JP2008082688A - Heat storing and radiating device and heat supply system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat storing and radiating device and a heat supply system capable of leveling heat utilization in a plurality of heat consumers and reducing equipment cost by circulating heat source water of high temperature to the plurality of heat consumers, and effectively utilizing the heat of the heat source water. <P>SOLUTION: The heat storing and radiating device comprises a heat storage tank 40; a heat-storing heat exchanger 70 exchanging heat between the heat source water HW and heat storage water SW; heat-radiating heat exchangers 75, 87 radiating the heat storage water SW; a heat storage water circulating means X circulating the heat storage water SW taken out of the tank 40, sequentially to the heat exchangers 70, 75 and then returning the heat storage water SW to the tank 40; a heat source water circulating means Y circulating the heat source water HW taken out of a circulating line 2, to the heat exchanger 70 and then returning the heat source water HW to the circulating line 2; and a control means 80 capable of carrying out heat storing operation of operating the means X, Y to heat the heat storage water SW in the heat exchanger 70, and heat radiating operation of radiating the heat of the heat storage water SW in the heat exchangers 75, 87. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a heat storage / radiation device that stores and uses heat from heat source water taken from a heat source water circulation line that circulates heat source water heated by the heat source device, and heats a plurality of heat consumers with the heat source device. A heat source water circulation line that circulates the generated heat source water,
The present invention relates to a heat supply system including a heat storage and heat dissipation device that stores and uses heat of heat source water taken from a heat source water circulation line that circulates heat source water heated by a heat source device for each of the plurality of heat consumers.

  In this type of heat supply system, for example, when supplying hot water to each household that is a heat consumer, a common cogeneration facility for the area is provided to a plurality of households in a predetermined area. It is intended to establish a system that can be used to supply heat with a high total energy efficiency.

  For this purpose, this type of heat supply system is provided with a heat source water circulation line through which heat source water (hot water temperature 50 to 90 ° C.) that is relatively hot on the common facility circulates, and is drawn into each household. A water supply line for supplying each household with water having a temperature lower than that of the heat source water, such as clean water, is used or provided. As water supplied through this water supply line, for example, preheated water preheated by exhaust heat of exhaust gas discarded from the common cogeneration facility can be used. The temperature of this type of water supply is about 5 to 25 ° C.

As this kind of heat supply system, what is proposed as “a system and method for supplying energy to a local community” is known (see, for example, Patent Document 1).
A schematic configuration of this system is a system called “neighboring cogeneration” shown in FIG. In this system, a fuel cell (SOFC) or a micro gas turbine (MGT) is a cogeneration facility, and high temperature water (90 ° C) is discharged from the facility and returned to the facility as hot water of 50 ° C. Yes. That is, the heat source water circulation line is provided for 40 households in the area.

  On the other hand, FIG. 6 of Patent Document 1 shows the configuration of the heat storage and heat dissipation device provided in each home. In this heat storage and heat dissipation device, a part of heat source water is passed from a high temperature water circulation supply line (the heat source water circulation line referred to in the present application) into a heat storage tank filled with a phase change heat storage material, and the heat of the heat source water is phase change heat storage. The heat is stored in the material, and further, the feed water is passed through the heat storage tank, the water supply is heated by heat radiation of the phase change heat storage material, and the heated water supply is used for hot water supply.

JP 2003-28449 A

  In the heat supply system described in Patent Document 1, since the water supply for hot water supply is heated by heat radiation from the phase change heat storage material in the heat storage tank, the phase change heat storage material does not sufficiently store heat. In some situations, the water supply may not be heated sufficiently.

  In addition, the phase change heat storage material in the heat storage tank actively stores the heat of the heat source water using the latent heat accompanying the phase change regardless of the heat demand, so the heat storage located near the upstream side of the heat source water circulation line In the tank, heat of the heat source water is stored excessively, so in the heat storage tank of the heat consumer located near the downstream side, the temperature of the heat source water tends to be lower than the phase change temperature of the phase change heat storage material, which is sufficient There is a case where an imbalance of heat utilization occurs among a plurality of heat consumers, such as inability to perform proper heat storage.

  In addition, using a heat storage tank filled with a phase change heat storage material complicates the structure of the heat storage tank and causes the cost to increase because the phase change heat storage material is expensive. .

  The present invention has been made in view of the above-mentioned problems, and its purpose is to circulate high-temperature heat source water for a plurality of heat consumers, and effectively use the heat held by the heat source water. It is in the point which provides the thermal storage and heat dissipation apparatus and heat supply system which can equalize the heat use in a some heat consumer, and can make equipment cost low.

In order to achieve the above object, a heat storage and heat dissipation device according to the present invention is a heat storage and heat dissipation device that stores and uses the heat of heat source water taken from a heat source water circulation line that circulates heat source water heated by the heat source device, The first characteristic configuration is a heat storage tank for storing heat storage water,
A heat storage heat exchanger that exchanges heat between the heat source water and the heat storage water;
A heat-dissipating heat exchanger that dissipates the heat storage water; and
Thermal storage water circulation means capable of circulating the thermal storage water in a state where the thermal storage water taken out from the thermal storage tank is sequentially returned to the thermal storage tank after passing through the thermal storage heat exchanger and the heat radiation heat exchanger in order.
Heat source water circulation means capable of circulating the heat source water in a state where the heat source water taken out from the heat source water circulation line is passed through the heat storage heat exchanger and then returned to the heat source water circulation line;
At least the heat storage water circulation means and the heat source water circulation means, and heat storage operation for heating the heat storage water circulating between the heat storage tank by heat exchange with the heat source water in the heat storage heat exchanger, and The heat dissipating heat exchanger includes a control means capable of performing a heat dissipating operation for dissipating the heat storage water.

  According to the first characteristic configuration described above, when the temperature of the heat storage water taken out from the heat storage tank by the heat storage water circulation means is high when performing the heat radiation operation by the control means, the high-temperature heat storage water is used as heat for heat dissipation. It can be passed through the exchanger. On the other hand, when performing the heat radiation operation by the control means, even if the temperature of the heat storage water taken out from the heat storage tank by the heat storage water circulation means is low, the low-temperature heat storage water is passed through the heat storage heat exchanger to increase the temperature. After heating by heat exchange with the heat source water, the heated high-temperature heat storage water can be passed through the heat radiating heat exchanger. Therefore, by performing the heat radiation operation by the control means, in the heat exchanger for heat radiation, the heat held in the heat source water and the heat storage water can be used effectively.

Further, when the heat storage operation is executed by the control means, if the heat dissipation operation is not executed, the heat storage water heated by heat exchange with the high-temperature heat source water is returned to the heat storage tank in the heat storage heat exchanger. Thus, heat storage in the heat storage tank is performed well. On the other hand, when the heat storage operation is performed by the control means, while the heat dissipation operation is being performed, the heat storage water heated by heat exchange with the high-temperature heat source water in the heat storage heat exchanger is the heat for heat dissipation. After being cooled by the exchanger, it will be returned to the heat storage tank, and excessive heat storage to the heat storage tank will be suppressed. As a result, for heat consumers located near the downstream side of the heat source water circulation line However, relatively hot heat source water is circulated.
In addition, as such a heat storage tank, it is possible to use heat storage water such as inexpensive water and to use a simple configuration that only stores the heat storage water, so that the equipment cost can be kept low. .

  As described above, according to the present invention, the heat source water is circulated for a plurality of heat consumers, the heat possessed by the heat source water can be effectively used, and the heat use in the plurality of heat consumers can be leveled. It is possible to realize a heat storage / dissipation device and a heat supply system that can reduce equipment costs.

The second characteristic configuration of the heat storage and dissipation device according to the present invention includes, in addition to the first characteristic configuration described above, a hot water supply heat exchanger through which hot water supply water flows from a water supply line as the heat dissipation heat exchanger,
The control means is configured such that, as the heat dissipation operation, a hot water supply operation in which hot water that has heated the water supply by heat exchange with the heat storage water in the hot water supply heat exchanger is supplied to a hot water supply unit. is there.

  According to the second feature configuration, by performing the hot water supply operation as the heat dissipation operation as described above by the control means, the hot water supply heat exchanger as the heat dissipation heat exchanger as described above includes Regardless of the temperature of the heat storage water taken out from the heat storage tank, the high-temperature heat storage water is passed. Therefore, the hot water supplied to the hot water supply unit in the hot water heat exchanger can be heated by effectively using the heat held by the heat source water and the heat storage water.

In addition to the second feature configuration, the third feature configuration of the heat storage and heat dissipation device according to the present invention is that the heat storage water circulating means extracts the heat storage water taken out from the upper portion of the heat storage tank for the heat storage heat exchanger and the hot water supply. The heat storage water is configured to be circulated in a high-temperature heat storage water circulation state that is returned to the lower portion of the heat storage tank after passing through the heat exchanger in order,
In the hot water supply operation, the control means operates the heat storage water circulation means in the high temperature heat storage water circulation state, and adjusts the temperature of the hot water heated by the hot water heat exchanger to the target hot water supply temperature. It is in the point comprised so that the circulation flow rate of water may be controlled.

According to the third characteristic configuration, when the hot water supply operation is performed by the control means, the heat storage water taken out from the upper part of the heat storage tank by the heat storage water circulation means in the high temperature heat storage water circulation state is used as a heat storage heat exchanger. Subsequently, after passing through a hot water supply heat exchanger to dissipate heat and cool, it can be returned to the lower part of the heat storage tank. Therefore, in the heat storage tank, the temperature stratification in a state in which the high-temperature heat storage water is retained on the upper side and the low-temperature heat storage water is retained on the lower side is maintained.
Further, when the hot water supply operation is performed by the control means, the circulation flow rate of the heat storage water is controlled so that the temperature of the hot water heated by the hot water heat exchanger becomes a desired target hot water temperature. The temperature of the heat storage water that flows out of the hot water supply heat exchanger and returns to the heat storage tank can be lowered as much as possible while securing the amount of heat radiation for heating the water supply to the target hot water supply temperature in the heater. The thermal stratification of the heat storage tank can be maintained at a good level while making more effective use of the heat.

  According to a fourth characteristic configuration of the heat storage and heat dissipation device according to the present invention, in addition to the second to third characteristic configurations, the hot water supply unit extracts heat source water extracted from the downstream side of the heat storage heat exchanger in the heat source water circulation unit. It is in the point provided with the heat source water supply means which can be supplied to.

  According to the fourth characteristic configuration, even when the temperature of the hot water supplied by the hot water heat exchanger does not reach a desired target hot water temperature during the hot water supply operation by the control means, the heat source water supply means. A relatively high temperature heat source water can be supplied to the hot water supply section.

In addition to the fourth characteristic configuration, the fifth characteristic configuration of the heat storage and dissipation device according to the present invention is such that the heat source water supply means can mix the heat source water with the hot water, and the hot water supply The mixing ratio of heat source water is adjustable,
The control means is configured to adjust the temperature of hot water supplied to the hot water supply unit to a target hot water temperature by controlling the mixing ratio by the heat source water supply means during the hot water supply operation. It is in.

  According to the fifth characteristic configuration, even when the temperature of the hot water heated by the hot water heat exchanger does not reach a desired target hot water temperature during the hot water supply operation by the control means, the heat source water supply means. A relatively high temperature heat source water can be mixed with the water supply to raise the temperature, and the hot water can be supplied to the hot water supply section. Furthermore, the temperature of the hot water supplied to the hot water supply unit can be adjusted to the target hot water temperature by adjusting the mixing ratio.

In addition to the fourth or fifth characteristic configuration described above, the sixth characteristic configuration of the heat storage and heat dissipation device according to the present invention is a bathtub located on the downstream side of the hot water supply heat exchanger in the heat storage water circulating means as the heat dissipation heat exchanger. With a reheating heat exchanger through which the bathtub water circulating between
The control means can execute, as the heat dissipation operation, a reheating operation that heats the bath water circulated between the bath and the heat storage water in the reheating heat exchanger by heat exchange with the heat storage water. And when the temperature of the heat storage water taken out from the heat storage tank is equal to or lower than a preset temperature during the simultaneous execution of the hot water supply operation and the reheating operation, to the hot water supply heat exchanger The supply of water is stopped, and the heat source water supply means supplies the heat source water to the hot water supply unit.

According to the sixth characteristic configuration, the control means performs the reheating operation as the heat dissipation operation as described above, thereby providing a reheating heat exchanger as the heat dissipation heat exchanger as described above. Regardless of the temperature of the heat storage water taken out from the heat storage tank, high-temperature heat storage water is passed. Therefore, in the heat exchanger for reheating, the bathtub water that circulates between the bathtub and the heat source water or the heat storage water can be effectively utilized and heated.
Furthermore, even when the temperature of the heat storage water taken out from the heat storage tank is equal to or lower than a set temperature during the simultaneous execution of the hot water supply operation and the reheating operation by the control means, the water supply to the hot water supply heat exchanger is performed. By stopping the supply, the low-temperature heat storage water is passed through the heat storage heat exchanger and heated by heat exchange with the high-temperature heat source water. The heat can be passed through the heat exchanger for reheating as it is, and the heat stored in the heat storage water can be effectively used in the heat heat exchanger for reheating.
Further, when the temperature of the heat storage water taken out from the heat storage tank is equal to or lower than the set temperature during the simultaneous execution of the hot water supply operation and the follow-up operation by the control means, as described above, to the hot water supply heat exchanger. Even if the supply of this water supply is stopped, all the heat source water whose temperature has been reduced by the heat storage heat exchanger can be supplied to the hot water supply section as hot water supply to continue the hot water supply. Furthermore, it is possible to prevent the relatively low-temperature heat source water whose temperature has been lowered by the heat storage heat exchanger from being returned to the heat source water circulation line, and as a result, to a heat consumer located near the downstream side of the heat source water circulation line. It is possible to prevent water from being circulated.

  According to a seventh characteristic configuration of the heat storage and heat dissipation apparatus according to the present invention, in addition to any one of the first to sixth characteristic configurations, the control means includes the temperature of the heat source water, the temperature of the heat storage water, and the time. It is in the point comprised so that the execution timing of the said thermal storage operation may be controlled based on each.

  According to the seventh characteristic configuration, whether or not each temperature of the heat source water and the heat storage water is a temperature that can be received from the heat source water in the heat storage heat exchanger by the control unit, and further, the time is After determining whether the total heat demand in a plurality of heat consumers is relatively small and within the appropriate time for storing heat in the heat storage tank, the heat storage operation is executed at the appropriate timing. It is possible to automatically store heat in the heat storage tank.

According to an eighth characteristic configuration of the heat storage and heat dissipation device according to the present invention, in addition to any one of the first to seventh characteristic configurations, the heat storage water circulating means extracts the heat storage water extracted from the upper part of the heat storage tank. A high-temperature heat storage water circulating state that is passed through the heat exchanger and the heat-dissipation heat exchanger in order and then returned to the lower part of the heat storage tank, and the heat storage water taken out from the lower part of the heat storage tank to the heat storage heat exchanger The circulation state of the heat storage water is configured to be switchable between a low temperature heat storage water circulation state that is returned to the upper part of the heat storage tank after being passed through,
The control means is configured to operate the heat storage water circulation means in the low-temperature heat storage water circulation state during the heat storage operation, and to operate the heat storage water circulation means in the high-temperature heat storage water circulation state during the heat dissipation operation.

According to the eighth feature configuration, in the heat storage tank, a high-temperature heat storage water is retained on the upper side and a low-temperature heat storage water is retained on the lower side, and the temperature stratification is favorably maintained. Can do.
That is, when the heat storage operation is executed by the control means, the low-temperature heat storage water circulating means in the low-temperature heat storage water circulation state causes the low-temperature heat storage water taken out from the lower part of the heat storage tank to flow to the heat storage heat exchanger. After heating to high temperature by heat exchange with high temperature heat source water, it can be returned to the upper part of the heat storage tank without passing it through the heat dissipation heat exchanger, so that the temperature stratification of the heat storage tank can be maintained well it can.
Further, when performing the heat radiation operation by the control means, the heat storage water taken out from the upper part of the heat storage tank is transferred to the heat storage heat exchanger by the heat storage water circulation means in the high temperature heat storage water circulation state. Since it is possible to return to the lower part of the heat storage tank after flowing through the heat exchanger and dissipating heat and cooling, the temperature stratification in the heat storage tank is maintained well.

The ninth characteristic configuration of the heat storage and heat dissipation apparatus according to the present invention is that, in addition to any one of the first to eighth characteristic configurations, the tub water circulating between the bathtub and the heat radiating heat exchanger is passed. Equipped with a heat exchanger
The said control means is comprised so that execution of the reheating operation which heats the bath water circulated between the said bathtubs by the heat exchange with the said thermal storage water in the said reheating heat exchanger as the said heat radiation operation is possible. In the point.

  According to the ninth characteristic configuration, by performing the reheating operation as the heat dissipation operation as described above by the control means, the reheating heat exchanger as the heat dissipation heat exchanger as described above is obtained. Regardless of the temperature of the heat storage water taken out from the heat storage tank, high-temperature heat storage water is passed. Therefore, in the heat exchanger for reheating, the bathtub water that circulates between the bathtub and the heat source water or the heat storage water can be effectively utilized and heated.

A tenth characteristic configuration of the heat storage and heat dissipation apparatus according to the present invention includes, in addition to any one of the first to ninth characteristic configurations, a heating radiator through which room air flows as the heat dissipation heat exchanger. Prepared,
The control means is configured such that, as the heat radiation operation, a heating operation in which the room air is heated by heat exchange with the heat storage water in the heating radiator can be executed.

  According to the tenth feature configuration, the control means performs the heating operation as the heat dissipation operation as described above, so that the heating radiator as the heat dissipation heat exchanger as described above has no heat storage. Regardless of the temperature of the heat storage water taken out from the tank, high-temperature heat storage water will flow through. Therefore, in the radiator for heating, the indoor air can be heated by effectively using the heat held by the heat source water or the heat storage water.

The eleventh characteristic configuration of the heat storage and radiating device according to the present invention is such that, in addition to the tenth characteristic configuration, the thermal storage water circulation means can circulate at least a part of the thermal storage water in a thermal storage tank bypass state in which the thermal storage tank is not passed. Composed of
In the heating operation, the control means does not pass the heat storage tank in the heat storage tank bypass state so as to adjust the temperature of the heat storage water supplied to the heating radiator to a target heating water temperature. The point is to control the water flow rate.

  According to the eleventh characteristic configuration, when the heating operation as described above is performed by the control means, at least a part of the warm stored water that is still radiated by the radiator for heating is used as the heat storage tank bypass. The heat storage water circulation means can be passed through the heat storage heat exchanger without being returned to the heat storage tank and heated to a high temperature without being returned to the heat storage tank. The heat stored in the heat storage tank can be effectively used, and the outflow of the heat storage water from the heat storage tank can be suppressed to prevent waste of heat stored in the heat storage tank. Further, during the heating operation, the heat storage tank is passed through the heat storage tank in the bypass state so as to adjust the temperature of the heat storage water supplied from the heat storage heat exchanger to the heat radiator for heating to the target heating water temperature. If the flow rate of the heat storage water not to be controlled is controlled, the temperature of the heat storage water supplied from the heat storage heat exchanger to the heating radiator can be appropriately maintained at the target heating water temperature.

  According to a twelfth feature of the heat storage and heat dissipation apparatus according to the present invention, in addition to any one of the first to eleventh features, a plurality of the heat dissipation heat exchangers are provided in parallel with each other in the heat storage water circulation means. It is in the point.

  According to the twelfth feature, when a plurality of heat dissipation heat exchangers are installed, a plurality of the heat dissipation heat exchangers are arranged in parallel with each other in the flow path in which the heat storage water is circulated by the heat storage water circulation means. Can be provided. For example, as a heat exchanger for heat dissipation, in addition to a heat exchanger for hot water supply and a heat exchanger for reheating, even when a heat radiator for heating is installed in each room, the heat radiator for heating is used as a heat exchanger for hot water supply, etc. On the other hand, it can be provided in parallel, and high-temperature heat storage water can be distributed and passed to each heat dissipation heat exchanger.

A thirteenth characteristic configuration of the heat storage and heat dissipation apparatus according to the present invention is the heat storage tank bypass state in which the heat storage water circulation means does not pass the heat storage tank in addition to any one of the first to twelfth characteristic configurations. It is configured to circulate water,
The control means is configured to place the heat storage water circulation means in the heat storage tank bypass state when the temperature of the heat storage water taken out from the upper part of the heat storage tank is equal to or lower than a set temperature during the heat radiation operation. There is in point.

  According to the thirteenth characteristic configuration, when the temperature of the heat storage water in the upper part of the heat storage tank is equal to or lower than the set temperature when the control means performs the heat radiation operation such as the heating operation, the heat exchanger for heat radiation The heat storage water circulating means that is in the heat storage tank bypass state can pass at least a part of the heat storage water that is still warm even if heat is radiated to the heat storage heat exchanger without returning to the heat storage tank. Therefore, after heat storage water is heated as high as possible in the heat storage heat exchanger, it can be passed through the heat dissipation heat exchanger.

In addition to any one of the first to thirteenth feature configurations, the fourteenth feature configuration of the heat storage and heat dissipation device according to the present invention is an open-air tank.
It is the point provided with the water level maintenance means which maintains the water level of the said thermal storage water in the said thermal storage tank constant.

  According to the fourteenth characteristic configuration, an open-air tank having a simpler configuration such as an integrally molded product of synthetic resin can be used as the heat storage tank. Further, since the water level of the heat storage water in the heat storage tank is kept constant by the water level maintenance means, the heat storage water stored in the upper part of the heat storage tank can be taken out appropriately and well and circulated by the heat storage water circulation means. it can.

  According to a fifteenth characteristic configuration of the heat storage and heat dissipation apparatus according to the present invention, in addition to any one of the first to fourteenth characteristic configurations, the control means may dissipate the heat source water in the heat storage heat exchanger. The heat storage water circulation means controls the circulation flow rate of the heat storage water based on the above.

  According to the fifteenth characteristic configuration, the control means can control to limit the circulation flow rate of the heat storage water so that the heat radiation amount of the heat source water in the heat storage heat exchanger is within an allowable range. And the excessive temperature fall of the heat source water in the downstream of a heat source water circulation line can be suppressed.

In addition, the heat supply system according to the present invention for achieving the above object includes a heat source water circulation line for circulating the heat source water heated by the heat source device for a plurality of heat consumers,
A heat supply system including a heat storage and heat dissipation device that stores and uses heat of heat source water taken from a heat source water circulation line that circulates heat source water heated by a heat source device for each of the plurality of heat consumers. The characteristic configuration is that the heat storage and heat dissipation device is configured as the heat storage and heat dissipation device according to the present invention.

That is, according to the characteristic configuration of the above heat supply system, the same effect by each characteristic configuration of the above-described heat storage / dissipation device according to the present invention is exhibited, and high temperature heat source water is supplied to a plurality of heat consumers. It is possible to realize a heat supply system that can circulate and effectively use the heat held by the heat source water, level the heat use in the plurality of heat consumers, and reduce the equipment cost.
Further, in such a heat supply system, each of a plurality of heat consumers should be charged using, for example, a unit price for the amount of heat released, using each of the measured heat dissipation amounts in each of the plurality of heat consumers. A heat usage fee can also be calculated.

As embodiment of this invention, the heat supply system provided with the thermal storage / dissipation apparatus 10 with respect to each of the some residence 1 (an example of a heat consumer) is demonstrated based on drawing.
The heat supply system shown in FIG. 1 is configured as a system that supplies heat to each of a plurality of residences 1 in the apartment house 5.
That is, the heat supply system includes a combined heat and power supply device 6 (an example of a heat source device) that generates heat together with power EP such as a gas engine generator and a fuel cell, and a high temperature of about 80 ° C. due to the heat generated by the combined heat and power supply device 6. A heat source water circulation line 2 that circulates the heat source water HW heated to the residence 1 and a water supply line 3 that supplies water LW having a temperature lower than that of the heat source water HW.
Further, the heat storage / heat dissipation device that stores heat of the heat source water HW taken from the heat source water circulation line 2 in each shared portion 1b of the plurality of residences 1 and is used for heating the water supply LW taken from the water supply line 3, for example. 10 are distributed. That is, in the heat storage and heat dissipation device 10 of each residence 1, the heat of the heat source water HW circulating through the heat source water circulation line 2 is primarily stored, and the heat stored in the heat storage and heat dissipation device 10 in the living part 1a of each residence 1 is It is configured to be used for hot water supply, and further for heating and bathing.

Furthermore, this heat supply system is provided with a preheating device 7 that recovers the heat of the unused exhaust gas EG of the cogeneration device 6 and preheats the feed water LW supplied to each residence 1. The water supply LW preheated to about 18 ° C. by the apparatus 7 is appropriately stored in a storage tank (not shown), and then supplied to each residence 1 through the water supply line 3.
Note that, in the combined heat and power supply device 6 and the preheating device 7, as a configuration of the heat source device for heating the heat source water HW and the feed water LW, for example, a known configuration such as a heat source device using engine exhaust heat or a heat pump system is adopted. Has been.

  The heat source water circulation line 2 of the heat supply system is a single loop pipe (single pipe pipe), a forward pipe for supplying hot water from the cogeneration device 6 side to each residence 1 side, and a cogeneration device from each residence 1 side. Compared to the case of using a double pipe that separately provides a return pipe for returning hot water to the 6 side, there is a cost merit because half the pipe is sufficient. However, in this heat source water circulation line 2, since the heat retained in the heat source water HW is sequentially extracted from the upstream side for each residence 1 with heat demand, the temperature decreases as going to the downstream residence 1. Therefore, an imbalance of heat utilization in each residence 1 is likely to occur.

  Therefore, the heat storage / dissipation device 10 distributed on each residence 1 side circulates the heat source water HW, and the heat held by the heat source water HW is effective in each residence 1 even when the temperature of the heat source water HW is likely to fluctuate. It is configured so that the hot water can be used for heating, the heat use in each residence 1 can be leveled, and the equipment cost can be reduced, and the embodiment of the heat storage and dissipation device 10 will be described below. As follows, the first embodiment and the second embodiment will be described.

[First Embodiment]
Hereinafter, the heat storage and heat dissipation device 100 of the first embodiment will be described with reference to FIG.
2 includes a heat storage tank 40 that stores heat storage water SW, and a heat storage heat exchanger 70 that performs heat exchange between the heat source water HW and the heat storage water SW, and the heat storage water SW. As a heat-dissipating heat exchanger that dissipates heat, a hot-water supply heat exchanger 75 that exchanges heat between a water supply LW or bathtub water BW, which will be described later, and the heat storage water SW, and an indoor air RA and a heat storage water SW, which will be described later. And a heating radiator 87 for exchanging heat with each other.
Furthermore, although the heat storage and heat dissipation device 100 will be described in detail later, the heat storage water circulation means X capable of circulating the heat storage water SW, the heat source water circulation means Y capable of circulating the heat source water HW, the heat storage water circulation means X and the heat source A control device 80 (an example of a control unit) is provided that controls the operation of the water circulation means Y and the like, and can execute a heat storage operation, a hot water supply operation as a heat radiation operation, a reheating operation, and a heating operation.

The heat storage tank 40 is formed of a synthetic resin molded body having a rectangular cross section, specifically, a rectangular cross section, and is an open air tank whose upper end is open to the atmosphere. And the thermal storage water SW which consists of tap water is stored in the inside to the predetermined | prescribed water level.
Further, as a water level maintaining means F for maintaining the water level of the heat storage water SW in the heat storage tank 40 constant, a water level sensor 44 for detecting the water level of the heat storage tank 40, a water supply path 16 connected to the water supply pipe 3 to be described later, and the heat storage. A replenishment path 45 that connects the upper end of the tank 40, an open / close operation valve 46 disposed in the replenishment path 45, and an overflow path that overflows the heat storage water SW that exceeds the upper limit water level of the target water level range in the heat storage tank 40. 49 is provided.
That is, when the water level in the heat storage tank 40 falls below the target water level range, the water level maintaining means F causes the control device 80 to open the open / close operation valve 46 based on the detection result of the water level sensor 44. Supply water LW is replenished to the heat storage tank 40 through the replenishment path 46, and conversely, when the water level in the heat storage tank 40 exceeds the target water level range, the heat storage water in the heat storage tank 40 is discharged through the overflow path 49. Thus, the water level in the heat storage tank 40 is maintained within the target water level range.
Further, a plurality of temperature sensors 41, 42, 43 are arranged in the heat storage tank 40 from the upper side to the lower side. For example, the temperature sensors 41, 42, 43 allow the upper part of the heat storage tank 40. The temperature of the heat storage water SW on the side, middle side, and lower side can be detected separately.

  In the heat storage heat exchanger 70, the heat source water HW circulated by the heat source water circulation means Y described later and the heat storage water SW circulated by the heat storage water circulation means X described later flow opposite to each other, and the heat source water HW And the heat storage water SW are configured to perform heat exchange. For example, as the heat exchanger 70, a known heat exchanger for two fluids can be used.

In the hot water supply reheating heat exchanger 75, the heat storage water SW circulated by the heat storage water circulation means X, which will be described later, flows and is supplied to the hot water supply section 85 through the water supply passage 16 so as to face the heat storage water SW. Water supply LW for hot water supply and bathtub water BW circulated between the bathtub 86 through the bathtub water circulation path 65 flow and exchange heat between the water supply LW and the heat storage water SW, and the bathtub water BW. And the heat storage water SW are configured to perform heat exchange. For example, as the heat exchanger 75, a known heat exchanger for three fluids can be used.
The hot water supply reheating heat exchanger 75 heats between the hot water heat exchanger for exchanging heat between the water supply LW and the heat storage water SW, and between the bathtub water BW and the heat storage water SW. You may comprise with another heat exchanger with the heating heat exchanger for replacement | exchange.

The water supply path 16 is configured as a flow path connected to the hot water supply section 85 after passing through the hot water supply reheating heat exchanger 75 from the water supply intake section 16 i of the water supply line 3.
That is, when the opening / closing operation valve 18 provided in the water supply passage 16 is opened and the supply of the water supply LW to the hot water supply section 85 is started, the water supply LW taken in from the water supply intake section 16i of the water supply line 3 After flowing through the reheating heat exchanger 75, the hot water is supplied to the hot water supply unit 85 as hot water W.
The hot water supply section 85 can be a hot water tap that simply discharges the hot water W, but may be a bath valve that supplies the hot water W to the bathtub 87 through the bathtub water circulation path 65 described later.

  Further, the details thereof will be described later. On the downstream side of the hot water supply heat exchanger 75 in the water supply path 16, the temperature of the feed water LW that has flowed out of the hot water supply heat exchanger 75 in order from the upstream side. A temperature sensor 32 that can be detected, a flow rate adjustment valve 31 that can adjust the flow rate of the feed water LW, a mixing unit 30 that will be described in detail later, a temperature sensor 33 that can detect the temperature of the hot water W as the hot water temperature, and a hot water supply unit An opening / closing operation valve 18 capable of intermittently supplying the hot water W to the water 85 by a user's operation is sequentially arranged.

On the other hand, the bathtub water circulation path 65 is configured as a flow path that is connected again to the bathtub 86 after passing through the hot water supply heat exchanger 75 from the bathtub 86. On the upstream side of the heat exchanger 75 for hot water, a bathtub water circulation pump 66 capable of sending the bathtub water BW toward the hot water supply heat exchanger 75 is provided.
That is, when the bathtub water circulation pump 66 is operated by the control device 80, the bathtub water BW taken out from the bathtub 86 in the bathtub water circulation path 65 flows into the hot water supply heat exchanger 75, and then the bathtub 86. The bathtub water BW circulates in the state returned to.
Moreover, although mentioned later for details, the temperature sensor 67 which can detect the temperature of the bathtub water BW is arrange | positioned in this bathtub water circulation path 65. FIG.

  The heating radiator 87 radiates the heat held by the heat storage water SW circulated by the heat storage water circulation means X, which will be described later, to the room air RA, and performs heat exchange between the room air RA and the heat storage water SW. It is comprised, and it is comprised as well-known heating apparatuses, such as a bathroom heating dryer and a warm water floor heater.

The heat storage water circulation means X is connected to the lower part 48 of the heat storage tank 40 after passing through the heat storage heat exchanger 70 and the hot water supply heat exchanger 75 or the heating radiator 87 in order from the upper part 47 of the heat storage tank 40. The heat storage water circulation path 51, and the heat storage water circulation pump 51 installed between the upper 47 side of the heat storage water circulation path 50 and the heat storage heat exchanger 70 and capable of sending the heat storage water SW from the upper 47 side toward the lower 48 side. It consists of and.
That is, in the heat storage water circulation means X, the heat storage water circulation pump 51 is operated by the control device 80, whereby the heat storage water SW taken out from the upper portion 47 of the heat storage tank 40 in the heat storage water circulation path 50 is replaced with the heat storage heat exchanger 70. The heat storage water SW is circulated in a high-temperature heat storage water circulation state that is passed through the hot water supply reheating heat exchanger 75 or the heating radiator 87 in order and then returned to the lower portion 48 of the heat storage tank 40.
Moreover, although mentioned later for details, the temperature sensor 57 which takes out the temperature of the thermal storage water SW taken out from the thermal storage tank 40 and detects it as thermal storage water temperature in the upstream of the thermal storage heat exchanger 70 in this thermal storage water circulation path 50. Furthermore, a temperature sensor 58 is provided on the downstream side of the hot water reheating heat exchanger 75 in the heat storage water circulation path 50 to detect the temperature of the heat storage water SW returned to the heat storage tank 40 as a return heat storage water temperature. It has been.

The heat source water circulation means Y is connected to the heat source water return portion 13o downstream from the heat source water intake portion 13i of the line 2 after passing through the heat storage heat exchanger 70 from the heat source water intake portion 13i of the heat source water circulation line 2. The heat source water circulation path 13 and the flow rate adjustment valve 11 installed between the heat source water intake part 13i and the heat source water return part 13o in the heat source water circulation line 2 and capable of adjusting the flow rate of the heat source water HW.
That is, the heat source water circulation means Y is configured to reduce at least a part of the heat source water HW circulating through the heat source water circulation line 2 through the heat source water intake part 13i by reducing the opening of the flow rate adjustment valve 11 by the control device 80. In the heat source water circulation path 13, the heat source hot water HW taken from the heat source water intake section 13 i is passed through the heat storage heat exchanger 70 and then returned to the heat source water circulation line 2 through the heat source water return section 13 o. The heat source water HW is circulated.
Further, the heat source water circulation path 13 is provided with a flow rate sensor 12 for detecting the flow rate of the heat source water HW, and the control device 80 controls the opening degree of the flow rate adjustment valve 11 based on the detection result of the flow rate sensor 12. The flow rate of the heat source water HW circulating through the heat source water circulation path 13 is maintained at a substantially constant flow rate of, for example, about 8 to 13 L / min.
Although details will be described later, a temperature sensor 14 capable of detecting the temperature of the heat source water HW taken in from the heat source water take-in portion 13i as the heat source water temperature is provided on the heat source water take-up portion 13i side in the heat source water circulation path 13. Furthermore, a temperature sensor 15 capable of detecting the temperature of the heat source water HW returned from the heat source water return portion 13o as the return heat source water temperature is provided on the heat source water return path 13o side in the heat source water circulation path 13. ing.

Furthermore, heat source water HW taken out from the downstream side of the heat storage heat exchanger 70 in the heat source water circulation path 13 can be mixed with the hot water W supplied from the hot water supply heat exchanger 75 to the hot water supply section 85, and The heat source water supply means Z that can adjust the mixing ratio of the heat source water HW in the hot water W is provided.
That is, the heat source water supply means Z is mixed through the water supply path 16 and the heat source water supply path 34 that connects the downstream side of the heat storage heat exchanger 70 in the heat source water circulation path 13 and the mixing section 30 provided in the water supply path 16. The flow rate adjustment valve 31 can adjust the flow rate of the feed water LW supplied to the unit 30, and the flow rate adjustment valve 35 can adjust the flow rate of the heat source water HW supplied to the mixing unit 30 through the heat source water supply path 34. ing. Then, the heat source water supply means Z mixes the heat source water HW through the heat source water supply path 34 and raises the temperature of the water LW supplied to the mixing section 30 through the water supply path 16 in the mixing section 30. Warm water supply LW is supplied to hot water supply section 85 as hot water supply water W. Furthermore, by adjusting the opening degree of each of the flow rate adjusting valves 31 and 35 by the control device 80, the mixing ratio of the heat source water HW in the hot water supply water W can be adjusted, and by adjusting the mixing ratio, the hot water supply The temperature of the water W can be adjusted on the higher temperature side than the water supply LW supplied to the mixing unit 30 through the water supply path 16.
The heat source water supply means Z supplies the heat source water HW supplied to the mixing section 30 through the heat source water supply path 34 to the hot water supply section 85 as the entire hot water supply water W in a state where the water supply LW is stopped. You can also.

Further, the heat source water supply means Z takes out the hot water W supplied from the hot water supply heat exchanger 75 to the hot water supply section 85 from the upstream side of the hot water supply heat exchanger 75 in the water supply path 16. In addition, the relatively low temperature feed water LW can be mixed, and the mixing ratio of the feed water LW in the hot water W can be adjusted.
In other words, the heat source water supply means Z is supplied to the mixing unit 30 through the water supply supply channel 37 that connects the upstream side of the hot water supply heat exchanger 75 in the water supply channel 16 and the mixing unit 30, and the water supply supply channel 37. And a flow rate adjustment valve 38 capable of adjusting the flow rate of the feed water LW. Then, the heat source water supply means Z mixes and cools the low-temperature feed water LW through the feed water supply path 37 in the mixing section 30 with the feed water LW supplied to the mixing section 30 through the feed water path 16 and cools it. Water supply LW is supplied to hot water supply unit 85 as hot water supply water W. Furthermore, the opening degree of each of the flow rate adjusting valves 31 and 38 is adjusted by the control device 80, so that the mixing ratio of the feed water LW in the hot water supply water W can be adjusted, and the mixing ratio is adjusted so that the hot water supply water is adjusted. The temperature of W can be adjusted on the higher temperature side than the water supply LW supplied to the mixing unit 30 through the water supply path 16.

Further, the hot water supply heat exchanger 70 and the heating radiator 87, which are heat dissipation heat exchangers, are provided in parallel to each other.
That is, between the heat storage heat exchanger 70 of the heat storage water circuit 50 and the lower part of the heat storage tank 40, the hot water supply circuit 60 that passes through the hot water supply heat exchanger 75 connected in parallel with each other, and heating The heating circulation path 61 passing through the heat radiator 87 is connected in parallel to each other. Therefore, the heat storage water SW that has flowed out of the heat storage heat exchanger 70 is supplied to the lower 48 side of the heat storage tank 40 through the hot water supply circulation path 60 and the heating circulation path 61. It will be.

Furthermore, the hot water supply recirculation circuit 60 is provided with a flow rate adjusting valve 52 capable of adjusting the flow rate of the heat storage water SW, while the heating circuit 61 can adjust the flow rate of the heat storage water SW. A flow rate adjustment valve 62 is provided.
And by controlling the opening degree of the flow rate adjusting valves 52, 62 by the control device 80, the flow rate of the heat storage water SW flowing through the hot water supply circulation circuit 60 in the heat storage water circuit 50, and the heating circuit The flow rate of the heat storage water SW flowing to 61 can be adjusted separately.

A bypass passage 54 is provided to connect the upper portion 47 side of the heat storage water circulation passage 50 and the lower portion 48 side of the circulation passage 50, and the bypass passage 54 is provided with a flow control valve 55 and an opening / closing operation valve 56. Yes.
And the thermal storage water circulation means X returns the thermal storage water SW which flowed into the bypass path 54 from the heating circulation path 61 to the lower part 48 of the thermal storage tank 40 by the opening / closing operation valve 56 being closed by the control device 80. The heat storage water SW can be circulated in a state where the heat storage tank 40 is not allowed to pass through in a state where the heat storage tank 40 is allowed to pass through while being allowed to flow from the upper side of the bypass path 54 to the upper side of the heat storage water circulation path 50.

Further, contrary to the high-temperature heat storage water circulation state described above, the heat storage water circulation means X allows the heat storage water SW taken out from the lower part 48 of the heat storage tank 40 to flow through the heat storage heat exchanger 70 and then passes through the heat storage tank 40. The heat storage water SW can be circulated in the low-temperature heat storage water circulation state returned to the upper portion 47, and the circulation state of the heat storage water SW can be switched between the high-temperature heat storage water circulation state and the low-temperature heat storage water circulation state. Yes.
That is, an opening / closing operation valve 78 capable of intermittently circulating the heat storage water SW is provided on the heat storage water circulation path 50 on the upper portion 47 side of the heat storage tank, and further, on the downstream side of the heat storage heat exchanger 70 and the heat storage tank 40. A heat storage water return path 76 connecting the upper portion 47 and an opening / closing operation valve 77 capable of intermittently circulating the heat storage water SW in the heat storage water return path 78 are provided.
When the heat storage water circulation pump 51 is operated by the control device 80 with the opening / closing operation valve 78 in the open state and the opening / closing operation valve 77 in the closed state, as described above, The relatively high temperature heat storage water SW taken out from the upper portion 47 passes through the heat storage water exchanger 70 and the hot water supply heat exchanger 75 or the heating radiator 87 in this order in the heat storage water circulation path 50, and then the same heat storage. In the so-called high-temperature heat storage water circulating state returned to the lower part 48 of the tank 40, the heat storage water SW is circulated.
On the other hand, the controller 80 closes the open / close operation valve 78 and opens the open / close operation valve 77, and opens the open / close operation valve 56 and the flow control valve 55. When the heat storage water circulation pump 51 is operated in the state where the flow rate adjustment valve 52 is closed, the relatively low temperature heat storage water SW taken out from the lower portion 48 of the heat storage tank 40 is stored through the bypass 54. After the heat storage water SW sucked into the water circulation pump 51 side and sent out by the heat storage water circulation pump 50 flows into the heat storage heat exchanger 70 in the heat storage water circulation path 50, the heat storage tank 40 is passed through the heat storage water return path 76. The heat storage water SW is circulated in a so-called low-temperature heat storage water circulation state that is returned to the upper portion 47.

  Next, in the heat storage and heat dissipation device 100 of the first embodiment, the details of the heat storage operation executed by the control device 80, the hot water supply operation as the heat dissipation operation, the chasing operation, and the heating operation will be described.

[Heat storage operation]
The control device 80 operates at least the heat storage water circulation means X and the heat source water circulation means Y, and performs heat exchange with the heat source water HW circulating in the heat source water circulation path 13 in the heat storage heat exchanger 70, The heat storage operation for heating the heat storage water SW circulating through the heat storage water circulation path 50 is configured to be executable.

That is, the control device 80 determines that the temperature of the heat storage water SW in the upper part of the heat storage tank 40 detected by the temperature sensor 41 is equal to the temperature of the heat source water HW taken from the heat source water circulation line 2 detected by the temperature sensor 14. When the temperature is relatively low, the heat storage water circulating means X is operated to circulate the heat storage water SW, and the heat source water circulation means Y is operated to circulate the heat source water HW in the heat source water circulation path 13 in the above heat storage operation. Execute.
Then, in the heat storage heat exchanger 70, heat exchange is performed between the relatively low temperature heat storage water SW taken out from the heat storage tank 40 and the relatively high temperature heat source water HW taken in from the heat source water circulation line 2. Thus, the relatively high-temperature heat storage water SW heated by heat exchange with the heat source water HW flows through the downstream side of the heat storage heat exchanger 70.
The heat stored in the heat source water HW can be stored in the heat storage tank 40 in a form in which the high-temperature heat storage water SW is returned to the heat storage tank 40.

Further, in this heat storage operation, the heat storage water circulation means X may be operated so as to circulate the heat storage water SW in either the above-described high-temperature heat storage water circulation state or low-temperature heat storage water circulation state. By circulating the heat storage water SW in the heat storage water circulation state, the heat storage tank 40 is configured in a temperature stratification type in which the high temperature heat storage water SW is retained on the upper side and the low temperature heat storage water SW is retained on the lower side. Temperature stratification can be maintained well.
That is, when executing the heat storage operation, the control device 80 sets the heat storage water circulation means X to the low-temperature heat storage water circulation state, and passes the low-temperature heat storage water SW taken out from the lower portion 48 of the heat storage tank 40 to the heat storage heat exchanger 70. After being heated and heated to a high temperature by heat exchange with the high-temperature heat source water HW, the heat storage tank 40 is returned to the upper portion 47 of the heat storage tank 40 without passing through the hot water reheating heat exchanger 75 or the heating radiator 87. Maintain a good temperature stratification of 40.

The control device 80 is configured to control the execution timing of the heat storage operation based on the temperature of the heat source water HW and the temperature and time of the heat storage water SW.
That is, the control device 80 has a relatively high temperature of the intake heat source water temperature detected by the temperature sensor 14 such as 65 ° C. or higher, and the heat storage tank 40 detected by the temperature sensors 41, 42, 43. When the temperature of the heat storage water SW is relatively low, such as 50 ° C. or less, and the heat demand in each residence 1 is relatively large, it is a time other than the 19: 00-22: 00 time zone. The heat storage operation is automatically executed.

  Furthermore, the control device 80 performs the above heat storage operation so that the temperature of the extracted heat storage water detected by the temperature sensor 57 is relatively high, such as 65 ° C. or higher, and the temperature of the extracted heat storage water is When the temperature difference of the return heat storage water temperature detected by the temperature sensor 58 becomes equal to or less than a set value such as 0.5 ° C., the heat storage operation is terminated.

[Hot water operation]
The controller 80 operates at least the heat storage water circulation means X and the heat source water circulation means Y as a heat radiation operation, and performs heat exchange with the heat storage water SW in the hot water supply heat exchanger 75 as a heat radiation heat exchanger. A hot water supply operation for heating the water supply LW is configured to be executable.

That is, when the opening / closing operation valve 18 provided in the water supply passage 16 is opened and the supply of the water supply LW to the hot water supply unit 85 is started, the control device 80 sets the heat storage water circulation means X to the high-temperature heat storage water circulation state described above. The heat storage water SW taken out from the upper part 47 of the heat storage tank 40 is circulated in the heat storage circulation path 50, and the heat source water circulation means Y is operated to circulate the heat source water HW in the heat source water circulation path 13 in the above manner. Perform hot water operation.
Then, regardless of the temperature of the heat storage water SW taken out from the heat storage tank 40, heat exchange is performed between the heat storage water SW and the heat source water HW in the heat storage heat exchanger 70, as in the heat storage operation described above. Thus, a relatively high-temperature heat storage water SW substantially equal to the heat source water HW flows through the heat storage water circulation path 50 downstream of the heat storage heat exchanger 70.
Therefore, in the hot water supply reheating heat exchanger 75, heat exchange is performed between the high-temperature heat storage water SW and the water supply LW flowing through the water supply path 16. A relatively high-temperature LW heated by heat exchange with the heat storage water SW flows downstream of the soaking heat exchanger 75, and the supplied water LW is supplied to the hot water supply unit 85 as the hot water W. .

  Further, the control device 80 controls the mixing ratio of the heat source water HW or the water LW to the hot water W by the heat source water supply means Z during the hot water supply operation, and supplies it to the hot water supply section 85 detected by the temperature sensor 33. It is comprised so that the temperature of the hot-water supply water W to be adjusted may be adjusted to target hot-water supply temperature.

That is, when the temperature of the feed water LW detected by the temperature sensor 32 is lower than the target hot water supply temperature, the control device 80 causes the heat source water supply means Z to increase the temperature of the hot water W in the mixing unit 30. Heat source water HW is mixed and heated, and the heat source water in the hot water W is adjusted by adjusting the opening of the flow rate adjusting valves 31 and 35 so that the hot water temperature detected by the temperature sensor 33 becomes the target hot water temperature. The mixing ratio of HW is adjusted.
Furthermore, when the temperature of the feed water LW detected by the temperature sensor 32 is higher than the target hot water supply temperature, the control device 80 causes the heat source water supply means Z to lower the temperature of the hot water W in the mixing unit 30. Mixing of the feed water LW in the hot water W by adjusting the opening of the flow rate adjusting valves 31 and 38 so that the hot water temperature detected by the temperature sensor 33 becomes the target hot water temperature. Configured to adjust the proportions.

[Remembrance driving]
The controller 80 operates at least the heat storage water circulation means X and the heat source water circulation means Y as a heat radiation operation, and performs heat exchange with the heat storage water SW in the hot water supply heat exchanger 75 as a heat radiation heat exchanger. The reheating operation for heating the bathtub water BW is configured to be executable.

That is, when a follow-up operation start command is input by an operation of a remote controller or the like, the control device 80 operates the heat storage water circulation means X in the above-described high-temperature heat storage water circulation state to enter the heat storage circulation path 50 from the upper portion 47 of the heat storage tank 40. The extracted heat storage water SW is circulated, the heat source water circulation means Y is operated, the heat source water HW is circulated in the heat source water circulation path 13, and the bathtub water circulation pump 66 is operated to be stored in the bathtub water circulation path 65 in the bathtub 85. The chasing operation is executed in a form in which the bathtub water BW is circulated.
Then, as in the hot water supply operation described above, the relatively high-temperature heat storage water SW substantially equal to the heat source water HW flows through the heat storage water circulation path 50 downstream of the heat storage heat exchanger 70.
Therefore, in the hot water supply reheating heat exchanger 75, the bathtub water BW that circulates between the bathtub 85 and the bathtub water circulation path 65 is heated by heat exchange with the high-temperature heat storage water SW.
Further, the control device 80 is configured to end the chasing operation when the temperature of the bath water BW detected by the temperature sensor 67 reaches a preset chasing temperature.

[Heating operation]
The control device 80 operates at least the heat storage water circulation means X and the heat source water circulation means Y as the heat radiation operation, and heats the room air RA by heat exchange with the heat storage water SW in the heat radiator 87 as a heat radiation heat exchanger. It is comprised so that execution of the heating operation which heats is possible.

That is, when a heating operation start command is input by an operation of a remote controller or the like, the control device 80 operates the heat storage water circulation means X in the above-described high-temperature heat storage water circulation state and takes it out from the upper portion 47 of the heat storage tank 40 to the heat storage circulation path 50. The heat storage water SW is circulated, the heat source water circulation means Y is operated, the heat source water HW is circulated through the heat source water circulation path 13, and the opening of the flow rate adjustment valve 52 is reduced to pass through the hot water supply circulation path 60. The heating operation is performed in such a manner that the opening degree of the flow rate adjustment valve 62 is increased while the flow rate of the stored heat storage water SW is decreased and the stored heat water SW is caused to flow through the heating circulation path 61.
Then, similarly to the hot water supply operation and the reheating operation described above, a relatively high temperature heat storage water SW substantially equal to the heat source water HW flows to the downstream side of the heat storage heat exchanger 70 in the heat storage water circulation path 50. Thus, at least a part of the heat storage water SW passes through the heating radiator 87 through the heating circulation path 61.
Therefore, in the heat radiator 87 for heating, the heat stored in the heat storage water SW is radiated to the indoor air RA, and the room is heated.

  Further, the control device 80 sets the heat storage water circulation means X to the heat storage tank bypass state when the temperature of the extracted heat storage water detected by the temperature sensor 57 becomes lower than the set temperature during the heating operation. With the valve 56 closed, the heat storage water SW that has flowed from the heating circulation path 61 into the bypass path 54 is returned from the upper side of the bypass path 54 to the upper side of the heat storage water circulation path 50 without returning to the lower portion 48 of the heat storage tank 40. It is comprised so that it may flow in. Therefore, the warm heat storage water SW that has flowed out of the heat radiator 87 is not returned to the heat storage tank 40, but is passed through the heat storage heat exchanger 70 and heated to as high a temperature as possible. It will be circulated.

Further, the control device 80 multiplies the flow rate of the heat source water HW detected by the flow rate sensor 12 to the temperature difference between the intake heat source water temperature detected by the temperature sensor 14 and the return heat source water temperature detected by the temperature sensor 15. Thus, the heat radiation amount of the heat source water HW in the heat storage heat exchanger 70 is measured, and further, the circulation flow rate of the heat storage water SW by the heat storage water circulation means X is controlled based on the measured heat radiation amount. Is configured to do.
That is, the control device 80 sets the heat radiation amount within a preset allowable range, and suppresses an excessive temperature drop of the heat source water HW flowing out downstream of the heat source water circulation line 2, so that the output of the heat storage water circulation pump 51 is output. The circulation flow rate of the heat storage water SW is controlled by the adjustment and the opening degree adjustment of the flow rate adjustment valve 52 to limit the heat radiation amount of the heat source water HW in the heat storage heat exchanger 70.
Furthermore, in the system (not shown) installed in this apartment house 5, the operating cost of the combined heat and power supply device 6 is used for the amount of heat released by using the amount of heat released in each house 1 measured in each of the plurality of houses 1. The heat usage fee to be charged for each of the plurality of residences 1 is calculated in the form of applying the unit price determined based on the above.

  Further, when the heat storage water circulation means X and the heat source water circulation means Y are in operation, the heat source water HW taken into the heat source water circulation path 13 from the heat source water intake section 13 i of the heat source water circulation line 2 is transferred from the upper portion 47 of the heat storage tank 40 to the heat storage water circulation path 50. When the temperature is lower than the heat storage water SW taken out, the heat source water HW is heated by heat exchange with the heat storage water SW in the heat heat exchanger 70, and the heated heat source water HW is returned to the heat source water. It returns to the heat source water circulation line 2 from the part 13o. Therefore, for example, even when the temperature of the heat source water HW circulating through the heat source water circulation line 2 is lowered, the heat held by the high-temperature heat storage water SW stored in the heat storage tank 1 in a certain residence 1 is converted to the heat source water HW. It can utilize for heating and can be accommodated in the residence 1 located in the heat source water circulation line 2 downstream from the residence 1.

  Further, a heat source water bypass passage 5 for connecting the heat source water intake part 13i and the heat source water return part 13o of the heat source water circulation line 2 is provided. For example, during maintenance, a manual on-off valve 7 leading to the heat source water intake part 13i is provided. Is closed, and the manual on-off valve 6 provided in the heat source water bypass passage 5 is opened, so that the heat source water HW is circulated through the heat source water bypass passage 5 without being circulated in the residence 1. be able to. The manual open / close valve 7 is normally open, and the manual open / close valve 6 is normally closed.

[Second Embodiment]
Hereinafter, the heat storage and heat dissipation device 200 of the second embodiment will be described with reference to FIG. In addition, about the structure similar to the said 1st Embodiment (FIG. 2), while attaching | subjecting the same code | symbol in drawing, description is omitted.
A heat storage and heat dissipation device 200 shown in FIG. 3 is a heat dissipation heat exchanger that dissipates the heat storage water SW, instead of the hot water supply heat exchanger 75 in the first embodiment (see FIG. 2) described above, A heat exchanger 75A for hot water supply for exchanging heat with the heat storage water SW and a heat exchanger 75B for reheating for exchanging heat between the bath water BW and the heat storage water SW are also used as heat dissipation heat exchangers. It is provided in parallel with the heat radiator 87 for heating.

In the hot water supply heat exchanger 75A, the stored hot water SW circulated by the stored heat water circulating means X flows, and the hot water supply water supplied to the hot water supply section 85 through the water supply passage 16 is opposed to the stored hot water SW. The LW flows and is configured to exchange heat between the water supply LW and the heat storage water SW.
The water supply path 16 is configured as a flow path connected to the hot water supply section 85 after passing through the hot water supply heat exchanger 75A from the water supply intake section 16i of the water supply line 3.
That is, when the supply of the water supply LW to the hot water supply section 85 is started, the water supply LW taken in from the water supply intake section 16i of the water supply line 3 flows into the hot water supply heat exchanger 75A and then supplied as the hot water supply water W. 85 will be supplied.
Furthermore, since the hot water supply section 85 is provided with a hot water tap that is manually opened and closed, the first embodiment described above (see FIG. 2) is provided downstream of the hot water supply heat exchanger 75A in the water supply path 16. Compared with, the opening / closing operation valve 18 capable of intermittently supplying hot water W to the hot water supply section 87 is omitted.

The reheating heat exchanger 75B is provided on the downstream side of the hot water supply heat exchanger 75A in the regenerator water circulation path 50, and the regenerator water SW circulated by the regenerator water circulation means X flows therethrough. The bathtub water BW circulated between the bathtub 86 and the bathtub 86 through the bathtub water circulation path 65 flows therethrough, and heat exchange is performed between the bathtub water BW and the heat storage water SW.
The bathtub water circulation path 65 is configured as a flow path that is connected to the bathtub 86 again after passing through the heat exchanger 75B for chasing from the bathtub 86.
That is, when the bathtub water circulation pump 66 is operated by the control device 80, the bathtub water BW taken out from the bathtub 86 in the bathtub water circulation path 65 flows into the reheating heat exchanger 75 </ b> B and then flows into the bathtub 86. In the returned state, the bathtub water BW is circulated.

  Furthermore, a temperature sensor 83 capable of detecting the temperature of the heat storage water supplied to the heating radiator 87 as the heating water temperature is disposed in the heating circulation path 61.

  Further, the regenerator water circulation means X does not circulate the regenerator water SW in the low-temperature regenerator water circulation state in the first embodiment described above, and always in the high-temperature regenerator water circulation state, that is, in the regenerator water circulation path 50, The heat storage water SW taken out from the upper portion 47 is sequentially passed through the heat storage heat exchanger 70, the hot water supply heat exchanger 75A and the reheating heat exchanger 75B or the heating radiator 87, and then the same heat storage tank 40. It is comprised so that the thermal storage water SW may be circulated in the form returned to the lower part 48 of this. Therefore, compared with the first embodiment described above (see FIG. 2), the heat storage water return path 76 and the open / close operation valve 77 for the low-temperature heat storage water circulation state are omitted.

  In the heat storage and heat dissipation device 200 of the second embodiment as described above, compared to the first embodiment described above, the heat storage operation, the hot water supply operation, the hot water supply / reheating simultaneous operation, and the heating operation have features. Details will be described below.

[Heat storage operation]
The controller 80 is configured such that the temperature of the heat storage water SW in the upper part of the heat storage tank 40 detected by the temperature sensor 41 is relatively higher than the temperature of the heat source water HW taken from the heat source water circulation line 2 detected by the temperature sensor 14. When the temperature is low, the heat storage water circulation means X is operated in the above-described high-temperature heat storage water circulation state to circulate the heat storage water SW in the heat storage water circulation path 50, and further, the heat source water circulation means Y is operated to heat the heat source water circulation path 13 to the heat source water. The heat storage operation is performed in a form in which the HW is circulated.
Then, in the heat storage heat exchanger 70, heat exchange is performed between the heat storage water SW taken out from the upper portion 47 of the heat storage tank 40 and the relatively high-temperature heat source water HW taken in from the heat source water circulation line 2. Thus, the relatively high-temperature heat storage water SW heated by heat exchange with the heat source water HW flows through the downstream side of the heat storage heat exchanger 70.
The heat stored in the heat source water HW can be stored in the heat storage tank 40 in a form in which the high-temperature heat storage water SW is returned to the lower portion 48 of the heat storage tank 40.
Furthermore, the control device 80 performs the above heat storage operation, whereby the temperature of the extracted heat storage water detected by the temperature sensor 57 or the temperature of the heat storage water SW of the heat storage tank 40 detected by the temperature sensors 41, 42, 43 is detected. However, the heat storage operation is terminated when the temperature becomes relatively high, such as a desired set value or more.

[Hot water operation]
The control device 80 operates the heat storage water circulation means X in the hot water storage water circulation state during the hot water supply operation, and stores the heat storage water SW so as to adjust the temperature of the water supply LW heated by the hot water supply heat exchanger 75A to the target hot water supply temperature. It is comprised so that the circulation flow rate of may be controlled.
That is, the control device 80 monitors the temperature of the feed water LW heated by the hot water supply heat exchanger 75A detected by the temperature sensor 32 when executing the hot water supply operation as the heat radiation operation. Further, when the temperature of the feed water LW is higher than the target hot water supply temperature, the circulation flow rate of the heat storage water SW is decreased. Conversely, when the temperature of the feed water LW is lower than the target hot water supply temperature, the circulation of the heat storage water SW is performed. In a form in which the flow rate is increased, the circulation flow rate of the heat storage water SW is controlled by adjusting the output of the heat storage water circulation pump 51 and adjusting the opening of the flow rate adjustment valve 52.
Then, the temperature of the heat storage water SW that flows out of the hot water supply heat exchanger 75A and returns to the lower portion 48 of the heat storage tank 40 while securing a heat radiation amount for heating the supply water LW to the target hot water supply temperature in the hot water supply heat exchanger 75A. Therefore, the thermal stratification of the heat storage tank 40 is maintained at a good level while the heat stored in the heat storage tank 40 is more effectively used.

[Simultaneous hot water supply and chasing]
When the temperature of the heat storage water SW taken out from the heat storage tank 40 is equal to or lower than the set temperature during the simultaneous execution of the hot water supply operation and the reheating operation, the control device 80 supplies the water LW to the hot water supply heat exchanger 75A. The heat source water HW is supplied to the hot water supply unit 85 by the heat source water supply means Z.
That is, the control device 80 monitors the temperature of the heat storage water SW extracted from the heat storage tank 40 detected by the temperature sensor 57 when simultaneously performing the hot water supply operation and the reheating operation as the heat radiation operation. When the temperature of the heat storage water SW is lower than the set temperature such as 40 ° C., the flow rate adjustment valve 31 is fully closed to stop the supply of the feed water LW to the hot water supply heat exchanger 75A, and the heat source water The heat source water HW taken out from the downstream side of the heat storage heat exchanger 70 in the heat source water circulation path 13 by the supply means Z is supplied to the hot water supply section 85.
Then, the low-temperature heat storage water SW taken out from the heat storage tank 40 is passed through the heat storage heat exchanger 70 and heated by heat exchange with the high-temperature heat source water HW, and then supplied to the hot water supply heat exchanger 75A. The heat passes through the heat exchanger 75B for reheating without passing through the heat, and the heat stored in the heat storage water SW in the heat exchanger 75B for reheating is used for heating the bath water BW. It is used effectively.
Furthermore, since all of the heat source water HW whose temperature has decreased in the heat storage heat exchanger 70 is supplied as hot water supply W to the hot water supply unit 85 via the mixing unit 30, hot water supply in the hot water supply unit 85 is continued. Further, the relatively low-temperature heat source water HW whose temperature has been reduced by the heat storage heat exchanger 70 is consumed by the hot water supply unit 85 without being returned to the heat source water circulation line 2, and as a result, near the downstream side of the heat source water circulation line 2. It is prevented that the low-temperature heat source water HW is circulated with respect to the dwelling 1 located in the house 1, and the heat use in each dwelling 1 is leveled.

  When the temperature of the heat storage water SW taken out from the heat storage tank 40 is higher than the set temperature during the simultaneous execution of the hot water supply operation and the reheating operation, the controller 80 supplies the water LW to the hot water supply heat exchanger 75A. The hot water supply LW supplied as hot water W to the hot water supply unit 85 is heated by heat exchange with the heat storage water SW in the hot water supply heat exchanger 75A without stopping the supply of water, and the heat storage heat exchanger 75B stores heat. The bath water BW is heated by heat exchange with the water SW.

[Heating operation]
In the heating operation, the control device 80 does not allow the heat storage tank 40 in the heat storage tank bypass state to pass through so as to adjust the temperature of the heat storage water SW supplied to the heat radiator 87 to the target heating water temperature. , That is, the flow rate of the heat storage water SW in the bypass passage 54 (hereinafter referred to as “bypass flow rate”).
That is, the control device 80 puts the heat storage water circulation means X into the heat storage tank bypass state when performing the heating operation as the heat dissipation operation, and stores the heat storage water supplied to the heating radiator 87 detected by the temperature sensor 83. Monitor SW temperature. When the temperature of the heat storage water SW is higher than the target heating water temperature, the bypass flow rate is decreased. Conversely, when the temperature of the heat storage water SW is lower than the target heating water temperature, the bypass flow rate is increased. In the embodiment, the flow rate of the heat storage water SW flowing into the upper portion of the heat storage water circulation passage 50 through the bypass passage 54 without returning to the lower portion 48 of the heat storage tank 40 by adjusting the opening degree of the flow adjustment valve 55 provided in the bypass passage 54. Control as the bypass flow rate.
Then, at the time of the heating operation, at least a part of the still warm heat storage water returning from the heating radiator 87 does not return to the heat storage tank 40 by the heat storage water circulation means X in the heat storage tank bypass state, and the heat storage heat exchanger Since the heat is passed through the heater 70 and heated to a high temperature and then reflowed through the heating radiator 87, the heat of the heat storage water SW returning from the heating radiator 87 is effectively used. Further, the heat storage water from the heat storage tank 40 is used. The outflow of SW is suppressed and waste of heat storage in the heat storage tank 40 is prevented. Further, since the bypass flow rate is controlled, the temperature of the heat storage water SW supplied from the heat storage heat exchanger 70 to the heating radiator 87 is appropriately maintained at the target heating water temperature.

  The heat storage and heat dissipation apparatus according to the present invention circulates high-temperature heat source water to a plurality of heat consumers, can effectively use the heat held by the heat source water, and leveles the heat use in the plurality of heat consumers It can be used as a heat storage / dissipation device and heat supply system that can reduce the equipment cost. It is effectively used in a form in which heat dissipating devices are installed in a distributed manner.

Conceptual diagram of heat supply system using heat storage and heat dissipation device Schematic configuration diagram of the heat storage and heat dissipation device of the first embodiment Schematic configuration diagram of the heat storage and heat dissipation device of the second embodiment

Explanation of symbols

1: Housing (heat customers)
2: Heat source water circulation line 3: Water supply line 6: Combined heat and power supply device (heat source device)
10 (100, 200): heat storage / heat dissipation device 13i: heat source water intake unit 13: heat source water circulation path 13o: heat source water return unit 16i: water supply intake unit 16: water supply channel 30: mixing unit 34: heat source water supply channel 37: water supply supply Path 40: Thermal storage tank 47: Upper part 48: Lower part 50: Thermal storage water circulation path 54: Bypass path 60: Hot water supply circulation path 61: Heating circulation path 65: Bath water circulation path 70: Heat storage heat exchanger 75: Hot water supply supplement Heating exchanger 75A: hot water supply heat exchanger 75B: reheating heat exchanger 80: control device (control means)
85: Hot water supply section 86: Bathtub 87: Heating radiator X: Heat storage water circulation means Y: Heat source water circulation means Z: Heat source water supply means F: Water level maintenance means HW: Heat source water SW: Heat storage water LW: Hot water W: Hot water BW : Bath water RA: Indoor air

Claims (17)

A heat storage and heat dissipation device that stores and uses heat from heat source water taken from a heat source water circulation line that circulates heat source water heated by the heat source device,
A heat storage tank for storing heat storage water;
A heat storage heat exchanger that exchanges heat between the heat source water and the heat storage water;
A heat-dissipating heat exchanger that dissipates the heat storage water; and
Thermal storage water circulation means capable of circulating the thermal storage water in a state where the thermal storage water taken out from the thermal storage tank is sequentially returned to the thermal storage tank after passing through the thermal storage heat exchanger and the heat radiation heat exchanger in order.
Heat source water circulation means capable of circulating the heat source water in a state where the heat source water taken out from the heat source water circulation line is passed through the heat storage heat exchanger and then returned to the heat source water circulation line;
At least the heat storage water circulation means and the heat source water circulation means, and heat storage operation for heating the heat storage water circulating between the heat storage tank by heat exchange with the heat source water in the heat storage heat exchanger, and A heat storage and heat dissipation device comprising: a control means capable of performing a heat radiation operation for radiating heat of the heat storage water in a heat dissipation heat exchanger. As the heat dissipation heat exchanger, a hot water supply heat exchanger through which hot water supply water flows from a water supply line,
The said control means is comprised so that execution of the hot water supply operation which supplies the hot-water supply which heated the said hot-water supply by the heat exchange with the said thermal storage water in the said hot-water supply heat exchanger to the hot-water supply part as the said heat radiation operation is possible. 1. The heat storage and heat dissipation device according to 1. In the high-temperature heat storage water circulation state, the heat storage water circulation means returns the heat storage water taken out from the upper part of the heat storage tank to the lower part of the heat storage tank after sequentially passing the heat storage water through the heat storage heat exchanger and the hot water supply heat exchanger. The heat storage water is configured to be circulated,
In the hot water supply operation, the control means operates the heat storage water circulation means in the high temperature heat storage water circulation state, and adjusts the temperature of the hot water heated by the hot water heat exchanger to the target hot water supply temperature. The heat storage and heat dissipation device according to claim 2, which is configured to control a circulating flow rate of water.   The heat storage and heat dissipation device according to claim 2 or 3, further comprising heat source water supply means capable of supplying heat source water extracted from a downstream side of the heat storage heat exchanger in the heat source water circulation means to the hot water supply section. The heat source water supply means is configured to be able to mix the heat source water with the hot water, and to adjust the mixing ratio of the heat source water in the hot water.
The control means is configured to adjust the temperature of the hot water supplied to the hot water supply unit to a target hot water temperature by controlling the mixing ratio by the heat source water supply means during the hot water supply operation. Item 5. The heat storage and dissipation device according to Item 4. As the heat-dissipating heat exchanger, on the downstream side of the hot-water supply heat exchanger in the heat storage water circulation means, a reheating heat exchanger through which the bath water circulating between the bath flows is provided,
The control means can execute, as the heat dissipation operation, a reheating operation that heats the bath water circulated between the bath and the heat storage water in the reheating heat exchanger by heat exchange with the heat storage water. And when the temperature of the heat storage water taken out from the heat storage tank is equal to or lower than a preset temperature during the simultaneous execution of the hot water supply operation and the reheating operation, to the hot water supply heat exchanger The heat storage and heat dissipation device according to claim 4 or 5, wherein the supply of water is stopped and the heat source water supply means supplies the heat source water to the hot water supply unit.   The said control means is comprised so that the execution timing of the said thermal storage operation may be controlled based on each of the temperature of the said heat source water, the temperature of the said thermal storage water, and time. The heat storage and heat dissipation device described. The high-temperature heat storage water circulation state in which the heat storage water circulation means returns the heat storage water taken out from the upper part of the heat storage tank to the lower part of the heat storage tank after sequentially passing the heat storage water through the heat storage heat exchanger and the heat radiation heat exchanger. The circulation state of the heat storage water can be switched between the low temperature heat storage water circulation state in which the heat storage water taken out from the lower part of the heat storage tank is passed through the heat storage heat exchanger and then returned to the upper part of the heat storage tank. Configured,
The control means is configured to operate the heat storage water circulation means in the low-temperature heat storage water circulation state during the heat storage operation, and to operate the heat storage water circulation means in the high-temperature heat storage water circulation state during the heat dissipation operation. The heat storage / dissipation device according to claim 7. As the heat-dissipating heat exchanger, it comprises a reheating heat exchanger through which the bath water circulating between the baths flows,
The said control means is comprised so that execution of the reheating operation which heats the bath water circulated between the said bathtubs by the heat exchange with the said thermal storage water in the said reheating heat exchanger as the said heat radiation operation is possible. The heat storage and heat dissipation apparatus according to any one of claims 1 to 8. As the heat exchanger for heat dissipation, a heating radiator through which room air flows is provided,
The said control means is comprised so that execution of the heating operation which heats the said indoor air by heat exchange with the said thermal storage water in the said heat radiator as the said heat radiation operation is possible. The heat storage and heat dissipation device described in 1. The heat storage water circulation means is configured to be able to circulate at least a part of the heat storage water in a heat storage tank bypass state that does not allow the heat storage tank to pass through,
In the heating operation, the control means does not pass the heat storage tank in the heat storage tank bypass state so as to adjust the temperature of the heat storage water supplied to the heating radiator to a target heating water temperature. The heat storage and dissipation device according to claim 10, configured to control a flow rate of water.   The heat storage and heat dissipation device according to any one of claims 1 to 11, wherein a plurality of the heat exchangers for heat dissipation are provided in parallel with each other in the heat storage water circulation means. The heat storage water circulation means is configured to be able to circulate at least a part of the heat storage water in a heat storage tank bypass state that does not allow the heat storage tank to pass through,
The control means is configured to place the heat storage water circulation means in the heat storage tank bypass state when the temperature of the heat storage water taken out from the upper part of the heat storage tank is equal to or lower than a set temperature during the heat radiation operation. The heat storage / dissipation device according to any one of claims 1 to 12. The heat storage tank is an open-air tank,
The heat storage and heat dissipation device according to any one of claims 1 to 13, further comprising water level maintaining means for maintaining a constant water level of the heat storage water in the heat storage tank.   The said control means is comprised so that the circulation flow rate of the said thermal storage water by the said thermal storage water circulation means may be controlled based on the thermal radiation amount of the said heat source water in the said heat storage heat exchanger. The heat storage and heat dissipation device according to one item. A heat source water circulation line that circulates the heat source water heated by the heat source device for a plurality of heat consumers,
A heat supply system including a heat storage and heat dissipation device that stores and uses heat of heat source water taken from a heat source water circulation line that circulates heat source water heated by a heat source device for each of the plurality of heat consumers. And
The heat supply system with which the said thermal storage / radiation apparatus is comprised as a thermal storage / radiation apparatus as described in any one of Claims 1-15.   The heat usage fee charged to each of the plurality of heat consumers is calculated based on a heat radiation amount of the heat source water in the heat storage heat exchanger in each of the plurality of heat consumers. Heat supply system.

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