JP4953436B2 - Thermal storage and heat dissipation system - Google Patents

Description

  The present invention is provided with a heat storage tank for storing the heat storage water, and a heat storage water circulation means for circulating the heat storage water taken out from the heat storage tank in the circulation path and returning it to the heat storage tank, and supplying heat to the circulation path Waste heat heat exchanger that heats the heat storage water flowing through the circulation path with the exhaust heat transfer fluid that transfers the exhaust heat of the apparatus, and heat dissipation that dissipates the heat storage water after passing through the exhaust heat heat exchanger The present invention relates to a heat storage and heat dissipation system provided with a heat exchanger for use.

  In the heat storage and heat dissipation system as described above, the heat storage water is heated by heat exchange between the heat storage water and the heat transfer fluid in the exhaust heat exchanger, and the heated heat storage water is radiated by the heat exchanger for heat dissipation. By using it for hot water supply, heating, etc., hot water supply, heating, etc. are performed using the heat stored in the heat storage tank and the exhaust heat of the heat supply device.

  In a conventional heat storage and heat dissipation system, a waste heat heat exchanger that superheats the heat storage water with cooling water as a waste heat carrier fluid in the circulation path, and a heating operation that heats the heat storage water after passing through the heat recovery heat exchanger A heat-dissipating heat exchanger that dissipates heat from the heat storage water after passing through the auxiliary heating means to the heat medium that is circulated between the heat consuming terminals is provided. The heat storage water is circulated in a form in which the entire amount of the heat storage water taken out from the lower part of the heat storage tank is passed through the exhaust heat exchanger (see, for example, Patent Document 1).

JP 2004-264011 A

  In the above conventional heat storage and heat dissipation system, the heat storage water taken out of the heat storage tank and the exhaust heat transport fluid are heat exchanged in the exhaust heat exchanger, so the temperature and flow rate of the heat storage water and the temperature of the exhaust heat transport fluid and Heat exchange is performed while the flow rate affects each other. For example, when the heat storage water and flow rate after passing through the exhaust heat exchanger are within a range suitable for exhaust heat recovery in the heat supply device, the exhaust water is discharged according to the temperature and flow rate of the exhaust heat transfer fluid. There is a possibility that the temperature or flow rate of the heat storage water to be passed through the heat heat exchanger must be limited, and there is a possibility that the heat storage water having the heat radiation amount required by the heat dissipation heat exchanger cannot be supplied. By the way, when heat storage water is supplied to the heat-dissipating heat exchanger, the temperature is given priority over the flow rate required by the heat-dissipating heat exchanger. The flow rate of the heat storage water to be passed through the heat exchanger is limited, and there is a possibility that the heat storage water having a flow rate required by the heat dissipation heat exchanger cannot be supplied.

  The amount of heat required by the heat-dissipating heat exchanger is for proper heat dissipation in the heat-dissipating heat exchanger, and the temperature of the heat storage water supplied to the heat-dissipating heat exchanger and the flow rate of the heat storage water. Is required. For example, if the heat dissipation target in the heat dissipation heat exchanger is water supply for hot water supply, the temperature of the heat storage water to be supplied to the heat dissipation heat exchanger and the heat storage water so that hot water at the hot water supply set temperature can be supplied at a sufficient flow rate. The flow rate is required. Therefore, if it becomes impossible to supply the heat storage water having the heat radiation amount required by the heat radiating heat exchanger, there is a possibility that the heat radiation by the heat radiating heat exchanger cannot be performed properly.

  The present invention has been made paying attention to such points, and its purpose is to provide a heat storage and heat dissipation system capable of supplying heat storage water having a heat release amount required for a heat dissipation heat exchanger to the heat dissipation heat exchanger. The point is to provide.

In order to achieve this object, the first characteristic configuration of the heat storage and radiating system according to the present invention includes a heat storage tank for storing the heat storage water, and the heat storage tank that circulates the heat storage water extracted from the heat storage tank in the circulation path. And a waste heat heat exchanger that heats the heat storage water flowing through the circulation path with an exhaust heat carrier fluid that conveys the exhaust heat of the heat supply device; and , A heat storage and heat dissipation system provided with a heat exchanger for heat dissipation to dissipate the heat storage water after passing through the exhaust heat exchanger,
An exhaust heat exchanger bypass path is provided for bypassing the exhaust heat exchanger and passing the heat storage water taken out from the heat storage tank to the circulation path to the heat dissipation heat exchanger, and the heat storage water circulation means is A total flow state in which the heat storage water is circulated in a form in which the entire amount of the heat storage water taken out from the heat storage tank is passed through the exhaust heat exchanger, and a part of the heat storage water taken out from the heat storage tank is the exhaust heat heat. It exists in the point comprised so that switching to the partial flow state which circulates thermal storage water with the form made to flow through an exchanger bypass is possible.

That is, when the heat storage water circulation means is switched to the full flow state, the entire amount of the heat storage water taken out from the heat storage tank can be heated by the exhaust heat exchanger and supplied to the heat dissipation heat exchanger. In this case, by limiting the flow rate of the heat storage water that is passed through the exhaust heat exchanger according to the temperature and flow rate of the exhaust heat transfer fluid, the amount of heat radiation required in the heat exchanger for heat dissipation can be reduced. When the stored heat storage water cannot be supplied to the heat-dissipating heat exchanger, the heat storage water circulation means can be partially switched to the flow-through state. When the heat storage water circulation means is switched to a partial flow state, the heat storage water taken out from the heat storage tank is not only passed through the exhaust heat exchanger but also passed through the exhaust heat exchanger bypass path, The shortage of the flow rate required by the heat-dissipating heat exchanger can be compensated by the heat storage water flowing through the heat-heat exchanger bypass path. Since the heat storage water heated by the exhaust heat exchanger and the heat storage water flowing through the exhaust heat exchanger bypass are mixed and supplied to the heat dissipation heat exchanger, It is possible to supply the heat storage water having the heat radiation amount required by the heat exchanger to the heat exchanger for heat radiation.
Therefore, even if it is necessary to limit the flow rate of the heat storage water that flows through the exhaust heat exchanger according to the temperature and flow rate of the exhaust heat transfer fluid, the amount of heat dissipation required by the heat exchanger for heat dissipation It has come to be able to provide a heat storage and heat dissipation system that can supply heat storage water having a heat dissipation heat exchanger.

  The 2nd characteristic structure of the thermal storage heat dissipation system which concerns on this invention exists in the point by which the auxiliary | assistant heating means which can perform the heating operation | movement which heats the thermal storage water to flow through is provided in the said exhaust heat exchanger bypass path. .

  That is, when the heat storage water circulation means is partially switched to the flow-through state, the auxiliary heating means executes the heating operation so that the heat storage water heated by the exhaust heat exchanger and the exhaust heat exchanger bypass are Heat storage water having a high temperature can be supplied to the heat-dissipating heat exchanger by mixing the heat storage water that has been passed through and heated by the auxiliary heating means. Therefore, even when the temperature of the heat storage water supplied to the heat-dissipating heat exchanger is required to be high, the heat storage water circulation means is partially switched to the flow-through state and the auxiliary heating means performs the heating operation. It can supply the required high-temperature heat storage water.

  3rd characteristic structure of the thermal storage thermal radiation system which concerns on this invention is comprised so that the said thermal storage water circulation means may take out thermal storage water from the upper part of the said thermal storage tank, and return thermal storage water to the lower part of the said thermal storage tank, The said thermal storage water circulation means Is switched to the full flow state to store the exhaust heat of the heat supply device in the heat storage tank, and the heat storage water circulation means is switched to the full flow state or the partial flow state and the auxiliary There exists an operation control means capable of performing a heat radiation operation for controlling whether or not to heat the heating means and radiating the heat storage water in the heat radiating heat exchanger.

That is, the operation control means switches the heat storage water circulation means to a full flow state or a partial flow state, and performs a heat radiation operation for controlling whether or not the auxiliary heating means is heated, thereby providing a heat exchanger for heat radiation. Heat storage water having the required temperature and flow rate can be supplied, and heat dissipation in the heat exchanger for heat dissipation can be performed appropriately.
When the operation control means performs the heat storage operation to switch the heat storage water circulation means to the full flow state, the entire amount of the heat storage water taken out from the upper part of the heat storage tank is heated by the exhaust heat exchanger, and the heated high-temperature heat storage Water can be returned to the bottom of the heat storage tank. Therefore, the temperature of the heat storage water stored in the heat storage tank can be entirely increased and stored by the high-temperature heat storage water returned to the lower part of the heat storage tank. In this way, the exhaust heat of the heat supply device can be stored in the heat storage tank by a simple structure that does not add a new structure but simply switches the heat storage water circulation means to the full flow state.
Therefore, in addition to being able to appropriately perform heat radiation in the heat exchanger for heat radiation, the exhaust heat of the heat supply device can be stored in the heat storage tank while simplifying the configuration.

  A fourth characteristic configuration of the heat storage and heat dissipation system according to the present invention includes a cooling water circulation means for circulating cooling water as the waste heat transfer fluid between the waste heat heat exchanger and the heat supply device, and a circulation path. Heat storage water flow rate adjusting means capable of adjusting the flow rate of the heat storage water flowing through the waste heat heat exchanger, and the operation control means is provided with the heat from the waste heat heat exchanger in the cooling water circulation means. Heat storage water flow rate adjustment control is performed to adjust the flow rate of the heat storage water flowing to the exhaust heat exchanger in the heat storage water flow rate adjusting means so that the temperature of the cooling water returned to the supply device is within a set temperature range. It is in the point comprised as follows.

  That is, since the exhaust heat transfer fluid is cooling water in a heat supply device such as an engine or a fuel cell, the temperature and flow rate of the cooling water returned from the exhaust heat exchanger to the heat supply device are suitable for cooling the heat supply device. Within the specified range. As for the amount of cooling water returned from the exhaust heat exchanger to the heat supply device, for example, the amount of cooling water circulated between the exhaust heat exchanger and the heat supply device by the cooling water circulation means is used to cool the heat supply device. The amount of cooling water returned from the exhaust heat exchanger to the heat supply device can be within a range suitable for cooling the heat supply device. Therefore, when the operation control means performs the heat storage operation or the heat radiation operation, the cooling water returned from the exhaust heat exchanger to the heat supply device while performing the heat storage operation or the heat radiation operation by performing the heat storage water flow rate adjustment control. By setting the temperature within the set temperature range, the temperature of the cooling water returned from the exhaust heat exchanger to the heat supply device can also be set within a range suitable for cooling the heat supply device. Thus, while making the temperature and flow rate conditions of the cooling water returned from the exhaust heat exchanger to the heat supply device suitable for cooling the heat supply device, the heat storage tank heat storage and heat dissipation heat exchanger Heat dissipation can be performed properly.

  The fifth characteristic configuration of the heat storage and heat dissipation system according to the present invention is the flow rate required for the heat exchanger for heat dissipation when the operation control means performs the heat storage water flow rate adjustment control in the heat dissipation operation. When the heat storage water can be supplied, the heat storage water circulation means is switched to the full flow state, and when the heat storage water at the required flow rate cannot be supplied to the heat radiating heat exchanger, the heat storage water circulation means is It is the point which is comprised so that it may switch to the said partial flow-through state.

That is, when the operation control means performs the heat storage water flow rate adjustment control in the heat radiation operation, the heat storage water having the required flow rate is reduced by restricting the flow rate of the heat storage water passed through the exhaust heat exchanger. It may become impossible to supply the exchanger. Therefore, when the heat storage water at the required flow rate can be supplied to the heat dissipation heat exchanger, the operation control means switches the heat storage water circulation means to the full flow state and exhausts the entire amount of the heat storage water taken out from the heat storage tank. The stored water can be supplied to the heat-dissipating heat exchanger while flowing through the heat-heat exchanger. When the heat storage water at the required flow rate cannot be supplied to the heat-dissipating heat exchanger, the operation control means switches the heat-storage water circulation means to a partial flow state and passes it through the exhaust heat exchanger bypass path. The heat storage water can be supplied to the heat exchanger for heat dissipation while compensating for the shortage of the flow rate required for water.
In this way, since the operation control means can perform the heat radiation operation while switching the heat storage water circulation means between the full flow state and the partial flow state, the flow rate required for the heat exchanger for heat radiation. The heat storage water can be reliably supplied.

  A sixth characteristic configuration of the heat storage and heat dissipation system according to the present invention is that, when the operation control unit switches the heat storage water circulation unit to the partial flow state in the heat dissipation operation, the heat dissipation heat exchanger is configured. When the heat storage water at the required temperature can be supplied, the auxiliary heating means is not heated and when the heat storage water at the required temperature cannot be supplied to the heat radiating heat exchanger, the auxiliary heating means is It is in the point comprised so that a heating operation may be carried out.

  That is, when the operation control means switches the heat storage water circulation means to a part of the flow state in the heat radiation operation, the heat storage water at the required temperature is used for heat dissipation simply by heating the heat storage water in the exhaust heat exchanger. Only when the heat storage water at the required temperature cannot be supplied to the heat exchanger for heat dissipation without heating the auxiliary heating means when it can be supplied to the heat exchanger. The auxiliary heating means is heated. Therefore, it is required for the heat exchanger for heat dissipation while effectively using the exhaust heat of the heat supply device to heat the heat storage water while heating the heat storage water by the auxiliary heating means to save energy. Heat storage water at the specified temperature can be supplied reliably.

  A seventh characteristic configuration of the heat storage and heat dissipation system according to the present invention is a heat storage tank bypass that connects a return portion that returns the heat storage water to the lower portion of the heat storage tank and a takeout portion that extracts the heat storage water from the upper portion of the heat storage tank in the circulation path. A heat storage tank bypass passage flow means capable of performing a flow operation for passing at least a part of the heat storage water after passing through the heat dissipation heat exchanger to the heat storage tank bypass passage, The operation control means is configured to control whether or not the heat storage tank bypass passage flow means is operated to flow in the heat radiation operation.

That is, when the temperature of the heat storage water taken out from the heat storage tank is low, the operation control means activates the heat storage tank bypass passage through means so that the heat storage water taken out from the heat storage tank is supplied from the heat storage tank bypass passage. The temperature of the heat storage water flowing through the exhaust heat exchanger can be increased by mixing the heat storage water. Therefore, while suppressing the consumption of heat stored in the heat storage tank, the temperature required for the heat exchanger for heat dissipation is effectively utilized by utilizing the heat of the heat storage water after passing through the heat exchanger for heat dissipation. Can be supplied.
In addition, when the temperature of the heat storage water taken out from the heat storage tank is high, the flow rate of the heat storage water is limited by limiting the flow rate of the heat storage water to be passed to the exhaust heat exchanger according to the temperature of the exhaust heat transfer fluid and the state of the fluid. If the means is switched to the full flow state, there is a possibility that the heat storage water having a flow rate required for the heat-dissipating heat exchanger cannot be supplied. Therefore, even in such a case, the operation control means operates the heat storage tank bypass passage passage means to mix the heat storage water extracted from the heat storage tank with the heat storage water from the heat storage tank bypass passage, thereby The temperature of the heat storage water flowing through the heat exchanger can be lowered. Due to the temperature drop of the heat storage water, it is possible to suppress the restriction of the flow rate of the heat storage water to be passed to the exhaust heat exchanger, and the heat storage water circulation means is switched to the all-flow state while the heat storage water circulation means is switched to the heat dissipation heat exchanger. On the other hand, the required amount of heat storage water can be supplied.

  The eighth characteristic configuration of the heat storage and heat dissipation system according to the present invention is a heat exchanger for hot water supply that uses hot water supplied to a hot water supply channel as a heat dissipation target as a heat exchanger for heat dissipation, and a bathtub. There is provided at least one of a heat exchanger for reheating that uses the bathtub water circulated in the heat storage water as a heat dissipation object and a heat radiator that heats the indoor air in the space to be heated as a heat dissipation object.

That is, in the hot water supply heat exchanger, the hot water supply water can be heated with the heat storage water, and the heated water supply can be supplied with hot water in the hot water supply path to supply hot water. In the reheating heat exchanger, the bathtub water can be heated with the heat storage water, and the reheating can be performed by supplying the heated bathtub water to the bathtub. In the radiator for heating, the indoor air in the space to be heated can be heated with the heat storage water, and the space to be heated can be heated.
Thus, hot water supply, reheating, and heating can be performed using the heat storage water heated by the exhaust heat of the heat supply device while effectively utilizing the exhaust heat of the heat supply device.

  A ninth characteristic configuration of the heat storage and heat dissipation system according to the present invention is that the stored water after the hot water supply heat exchanger and the reheating heat exchanger have passed through the reheating heat exchanger is the hot water supply heat. It is provided in series so as to flow through the exchanger, and one or both of the hot water supply heat exchanger and the reheating heat exchanger and the heating radiator are provided in parallel. It is in.

That is, since the heat storage water after passing through the reheating heat exchanger flows to the hot water supply heat exchanger, it is possible to supply hot storage water at a higher temperature to the reheating heat exchanger than to the hot water supply heat exchanger. it can. In the heat exchanger for reheating, heat storage water having a temperature higher than that of the heat exchanger for hot water supply is required, so that the heat storage water is supplied to each of the heat exchanger for reheating and the heat exchanger for hot water supply while responding to the request. Can supply.
In addition, since the heat radiator for heating is provided in parallel with the heat exchanger for hot water supply and the heat exchanger for heating, the heat storage water supplied to the heat radiator for heating is the heat exchanger for hot water supply and the heat exchanger for heating. Regardless of the heat dissipation in each of the heat exchangers, the heat storage water can be supplied to the heating radiator. Therefore, the heat storage water having the required temperature can be reliably supplied to the heating radiator, and the heating target space can be accurately heated.

  A tenth characteristic configuration of the heat storage and heat dissipation system according to the present invention is that the hot water supply heat exchanger and the reheating heat exchanger are provided in parallel.

  That is, when heat is dissipated from the heat storage water to the hot water supply water in the hot water supply heat exchanger, compared with the case where the hot water supply heat exchanger and the reheating heat exchanger are provided in series, the heat storage water is exchanged for hot water supply. All you need to do is pass through the vessel. Even when heat is radiated from the heat storage water to the bathtub water in the heat exchanger for reheating, it is only necessary to pass the heat storage water through the heat exchanger for reheating. Therefore, when the heat storage water is radiated in the hot water supply heat exchanger and the reheating heat exchanger, the pressure loss when circulating the heat storage water can be minimized.

An embodiment of a heat storage and heat dissipation system according to the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 8, this heat storage and heat dissipation system circulates in a heat storage tank 1 for storing water as the heat storage water A1 and the heat storage water A1 taken out from the heat storage tank 1 through a circulation path 2 to store heat. Heat storage water circulation means 3 for returning to the tank 1 is provided. In the circulation path 2, an exhaust heat exchanger 5 that heats the heat storage water A <b> 1 that flows through the circulation path 2 using an exhaust heat transport fluid that transports the exhaust heat of the heat supply device 4, and the exhaust heat exchanger thereof A heat-dissipating heat exchanger 6 that dissipates the heat storage water A <b> 1 after passing through 5 is provided.
In FIGS. 1-8, the part through which the fluid flows is shown by the thick line. 1 to 8 show the same configuration with respect to other configurations except that the portion through which the fluid flows is different.

The heat supply device 4 is, for example, a combined heat and power supply device including a gas engine that uses city gas as fuel and a fuel cell, and the cooling water A2 as the exhaust heat carrier fluid recovers exhaust heat from the gas engine and fuel cell. It is configured as follows. A cooling water circulation path 7 for circulating the cooling water A2 is provided between the exhaust heat exchanger 5 and the heat supply device 4, and a cooling water circulation pump 8 as a cooling water circulation means is provided in the cooling water circulation path 7.
In the cooling water circulation path 7, a cooling water going-out temperature sensor 9 that detects the temperature of the cooling water A 2 supplied from the heat supply device 4 to the exhaust heat exchanger 5, and supplied from the heat supply device 4 to the exhaust heat exchanger 6. A cooling water flow rate sensor 10 that detects the flow rate of the cooling water A2 and a cooling water return temperature sensor 11 that detects the temperature of the cooling water A2 returned from the exhaust heat exchanger 6 to the heat supply device 4 are provided.

  The heat storage tank 1 is configured as an open air type having an opening leading to the atmosphere at a position higher than the upper surface of the stored heat storage water A1. Although illustration is omitted, a replenishment path and a replenishment valve are provided for replenishing the heat storage water A1 to the heat storage tank 1, and replenishment is detected when the lower limit water level sensor detects that the water level of the heat storage water A1 is less than the lower limit water level. The valve is opened, and the heat storage water A1 is supplied to the heat storage tank 1 through the supply path. When the upper limit water level sensor detects that the water level of the heat storage water A1 has reached the upper limit water level, the replenishment valve is closed and the replenishment of the heat storage water A1 to the heat storage tank 1 is stopped in the replenishment path.

The circulation path 2 is connected to the upper part and the lower part of the heat storage tank 1, and the heat storage water circulation means 3 is configured to take out the heat storage water A1 from the upper part of the heat storage tank 1 and return the heat storage water A1 to the lower part of the heat storage tank 1. Has been.
An exhaust heat exchanger bypass path 13 is provided for allowing the heat storage water A1 taken out from the heat storage tank 1 to the circulation path 2 to bypass the exhaust heat exchanger 5 and to flow to the heat dissipation heat exchanger 6. This exhaust heat exchanger bypass passage 13 is provided with a bypass passage adjustment valve 18 capable of adjusting whether or not the heat storage water A1 is allowed to flow and its flow rate.

  The heat storage water circulation means 3 includes a heat storage water circulation pump 12 and a bypass passage adjustment valve 18. The heat storage water circulation means 3 has a whole flow state (for example, a thick line portion in FIG. 2) in which the heat storage water A1 is circulated in a form in which the entire amount of the heat storage water A1 taken out from the heat storage tank 1 is passed through the exhaust heat exchanger 5. The heat storage water A1 taken out from the heat storage tank 1 can be switched to a partially flowing state (for example, a thick line portion in FIG. 3) in which the heat storage water A1 is circulated in a form in which the heat storage water A1 is passed through the exhaust heat exchanger bypass passage 13. It is configured. That is, the heat storage water circulation means 3 switches to the full flow state by operating the heat storage water circulation pump 12 with the bypass passage adjustment valve 18 closed. Further, the heat storage water circulation means 3 is switched to a partially flowing state by operating the heat storage water circulation pump 12 with the bypass passage adjustment valve 18 opened.

  The exhaust heat exchanger bypass passage 13 is provided with auxiliary heating means 14 capable of performing a heating operation for heating the stored heat storage water A1. The auxiliary heating means 14 is configured to heat the heat storage water A1 by burning the gas burner 15. The fuel gas supply passage 16 for supplying a fuel gas such as city gas to the gas burner 15 is provided with a fuel gas regulating valve 17 capable of adjusting whether or not the fuel gas is supplied to the gas burner 15 and the fuel gas supply amount. Yes. The auxiliary heating means 14 is configured to be able to perform a heating operation by opening the fuel gas regulating valve 17 and burning the gas burner 15.

  The circulation path 2 is connected to the first heat storage water temperature sensor 25 for detecting the temperature of the heat storage water A1 taken out from the heat storage tank 1 and the exhaust heat exchanger bypass path 13 from the upstream side in the flow direction of the heat storage water A1. The second heat storage water temperature sensor 26 for detecting the temperature of the heat storage water A1 flowing to the location, the heat storage water circulation pump 12, and the heat storage water flow rate adjusting means capable of adjusting the flow rate of the heat storage water A1 flowing to the exhaust heat exchanger 5. Of the heat storage water A1 after passing through the first heat storage water flow rate adjusting valve 27, the exhaust heat exchanger 5, the reheating heat exchanger 23 as the heat dissipation heat exchanger 6, and the reheating heat exchanger 23. A third heat storage water temperature sensor 28 for detecting the temperature, a hot water supply heat exchanger 21 as the heat dissipation heat exchanger 6, a heat storage water flow rate sensor 29 for detecting the flow rate of the heat storage water A1 passing through the hot water supply heat exchanger 21, Adjust the flow rate of the heat storage water A1 passing through the hot water supply heat exchanger 21 The second heat storage water flow regulating valve 30 is provided such.

The hot water supply heat exchanger 21 is configured so that the hot water supply water A3 supplied from the water supply path 19 and supplied to the hot water supply path 20 is a heat dissipation target of the heat storage water A1. The water supply path 19 is provided with a water supply temperature sensor 31 that detects the temperature of the water supplied to the hot water supply heat exchanger 21. In the hot water supply path 20, from the upstream side in the flow direction of the hot water supply water A3, the flow rate of the hot water supply water A3 passing through the hot water supply heat exchanger 21 can be adjusted, the hot water supply flow rate adjustment valve 32, and the hot water supply heat exchange. An outlet temperature sensor 33 that detects the temperature of the hot water supply water A3 after passing through the water heater 21, a hot water supply sensor 34 that detects the amount of hot water supplied through the hot water supply channel 20, and a hot water supply temperature that supplies hot water through the hot water supply channel 20 A hot water supply temperature sensor 35 is provided.
Further, a hot water supply bypass path 36 for supplying hot water supply water A3 from the water supply path 19 to the hot water supply path 20 by bypassing the hot water supply heat exchanger 21 is provided, and the water supply A3 flowing through the hot water supply bypass path 36 is provided. A bypass flow rate adjustment valve 37 is provided which can adjust the flow rate.
In this way, the hot water supply water A3 heated by the hot water supply heat exchanger 21 and the hot water supply water A3 from the hot water supply bypass passage 26 are mixed to supply hot water in the hot water supply passage 20. ing.

The reheating heat exchanger 23 is provided in series with the hot water supply heat exchanger 21 so that the heat storage water A1 after passing through the reheating heat exchanger 23 flows to the hot water supply heat exchanger 21. Yes. The reheating heat exchanger 23 is configured so that the bathtub water A4 is a heat dissipation target of the heat storage water A1 between the bathtub 22 and the heat exchanger 23.
A bathtub water circulation path 38 that circulates the bathtub water A4 between the bathtub 22 and the reheating heat exchanger 23 is provided. The bathtub water circulation path 38 is provided with a bathtub water temperature sensor 39 for detecting the temperature of the bathtub water A4 supplied from the bathtub 22 to the reheating heat exchanger 23, and a bathtub water circulation pump 40.

In addition to the hot water supply heat exchanger 21 and the reheating heat exchanger 23, the heat dissipation heat exchanger 6 is provided with a heating radiator 24 that radiates the indoor air in the heating target space. The heating radiator 24 is, for example, a floor heating panel, and a bathroom heating device or the like is also applicable.
The heating radiator 24 is provided in parallel with the hot water supply heat exchanger 21 and the reheating heat exchanger 23. That is, the heating passage 41 is provided in parallel with the portion of the circulation path 2 where the hot water supply heat exchanger 21 and the reheating heat exchanger 23 are provided, and the heating passage 41 is connected to the heating passage 41. A radiator 24 is provided. The heating flow passage 41 is provided so as to branch from the middle portion of the exhaust heat exchanger bypass passage 13 and join the circulation passage 2, and also serves as a part of the exhaust heat exchanger bypass passage 13. .
In the heating flow path 41, the heating forward temperature sensor 42 that detects the temperature of the heat storage water A <b> 1 supplied to the heating radiator 24 from the upstream side in the flow direction of the heat storage water A <b> 1, and the heat storage in the heating radiator 24. There are provided a thermal valve 43 that can adjust whether or not to supply water A1, and a heating check valve 44 that prevents the backflow of the heat storage water A1.

  In the circulation path 2, a heat storage tank bypass path 45 is provided that connects a return portion 2 a that returns the heat storage water A <b> 1 to the lower portion of the heat storage tank 1 and an extraction portion 2 b that extracts the heat storage water A <b> 1 from the upper portion of the heat storage tank 1. The heat storage tank bypass passage 45 has a bypass temperature sensor 46 that detects the temperature of the heat storage water A1 that flows therethrough, and a heat storage tank bypass passage that is adjustable whether the heat storage water A1 flows through the heat storage tank bypass passage 45 or not. A heat storage water return adjustment valve 47 is provided as a flow means. Then, the heat storage tank bypass passage flow means opens the heat storage water return adjustment valve 47 to pass at least a part of the heat storage water A1 after passing through the heat dissipation heat exchanger 6 to the heat storage tank bypass passage 45. It is configured to be able to execute a flow-through operation.

An operation control device 48 is provided as an operation control means for controlling the operation of the heat storage and heat dissipation system. The operation control device 48 performs a heat storage operation in which the exhaust heat of the heat supply device 4 conveyed by the cooling water A2 is stored in the heat storage tank 1, and a heat radiation operation in which the heat storage water A1 is radiated by the heat dissipation heat exchanger 6. Configured to be executable. The operation control device 48 performs, as a heat radiation operation, a hot water supply operation in which the heat storage water A1 is radiated by the hot water supply heat exchanger 21, a reheating operation in which the heat storage water A1 is radiated by the reheating heat exchanger 23, and heating. Each of the heating operations in which the heat storage water A1 is radiated by the radiator 24 is configured to be executable.
Hereinafter, the operation in each operation will be described.

(Heat storage operation)
This heat storage operation may be performed when the exhaust heat of the heat supply device 4 is to be stored in the heat storage tank 1, and it is possible to appropriately change when it is executed.
For example, the operation control device 48 compares the required heat release amount required for the day and the current heat storage amount obtained based on past results, etc., and the required heat release amount is greater than the current heat storage amount. The heat storage operation is executed assuming that the exhaust heat of the heat supply device 4 is to be stored in the heat storage tank 1. About the present heat storage amount, it was radiated by the heat exchanger 6 for heat dissipation after the previous heat storage operation was finished by the detection information of each of the heat storage water temperature sensors 25, 29, 46 and the detection information of the heat storage water flow rate sensor 29, etc. It can be determined based on the amount of heat released and the amount of heat released in the heat storage tank 2 assumed from the outside air temperature, elapsed time, and the like.
Moreover, in this embodiment, since the heat supply device 4 is a combined heat and power supply device, in the winter season when there is a great demand for heating, when there is a demand for electric power, a constant heat storage operation can be executed.

As shown in FIG. 1, the operation control device 48 is configured to operate the heat supply device 4 and the cooling water circulation pump 8 so that the cooling water A2 flows through the exhaust heat exchanger 5. . The operation control device 48 activates the heat storage water circulation pump 8 with the first heat storage water flow rate adjustment valve 27 and the second heat storage water flow rate adjustment valve 30 opened and the bypass passage adjustment valve 18 closed. The water circulation means 3 is configured to be switched to the full flow state. The operation control device 48 adjusts the opening degree of the first heat storage water flow rate adjustment valve 27 so that the detected temperature of the cooling water return temperature sensor 11 falls within the set temperature range, and passes it to the exhaust heat exchanger 5. The heat storage water flow rate adjustment control for adjusting the flow rate of the heat storage water A1 is performed.
In this way, the entire amount of the heat storage water A1 taken out from the upper part of the heat storage tank 1 is heated by the exhaust heat exchanger 5 and returned to the lower part of the heat storage tank 1. With the heated heat storage water A1, the temperature of the heat storage water A1 stored in the heat storage tank 1 is entirely increased and stored in the heat storage tank 1.

The operation control device 48 ends the heat storage operation when the temperature detected by the first heat storage water temperature sensor 25 reaches the heat storage completion set temperature. The heat storage completion set temperature at this time can be appropriately changed. For example, it can be set to 55 ° C. when the required heat release amount is small, such as in summer, and can be set to 75 ° C., when the required heat release amount is high, such as in winter.
Then, once the heat supply device 4 is operated, the operation control device 48 is configured to continue the operation of the heat supply device 4 until the temperature detected by the first heat storage water temperature sensor 25 becomes equal to or higher than the heat storage completion set temperature. Has been.

(Hot water operation)
FIG. 2 shows a case where the hot water supply operation is performed without operating the heat supply device 4 when the temperature detected by the first heat storage water temperature sensor 25 is higher than the first set temperature (for example, 60 ° C.).
The operation control device 48 switches the heat storage water circulation means 3 to the full flow state, and the second heat storage based on the detection flow rate of the heat storage water flow rate sensor 29 so that the detection temperature of the outlet temperature sensor 33 becomes the hot water supply set temperature + α. The hot water storage temperature heat storage water flow rate control for adjusting the opening degree of the water flow rate adjustment valve 30 is performed. Further, the operation control device 48 includes the hot water supply flow rate adjustment valve 32 and the bypass flow rate adjustment valve so that the detected flow rate of the hot water supply amount sensor 34 becomes the required hot water supply amount and the detected temperature of the hot water supply temperature sensor 35 becomes the hot water supply set temperature. The hot water supply control for adjusting the opening degree of 37 is performed.

FIG. 3 shows a case where the hot water supply operation is performed by operating the heat supply device 4 when the temperature detected by the first heat storage water temperature sensor 25 is higher than the first set temperature.
The operation control device 48 is configured to operate the cooling water circulation pump 8 to flow the cooling water A2 through the exhaust heat exchanger 5 and to perform heat storage water flow rate adjustment control. Further, similarly to the case shown in FIG. 2, the operation control device 48 is configured to perform hot water storage temperature storage water flow rate control and hot water supply control.
And about the thermal storage water circulation means 3, when the detection flow volume of the thermal storage water flow sensor 29 satisfy | fills the flow volume requested | required in the hot water supply heat exchanger 21, the operation control apparatus 48 makes the thermal storage water circulation means 3 into a full flow state. When the flow rate detected by the heat storage water flow sensor 29 is less than the flow rate required by the hot water supply heat exchanger 21, the operation control device 48 opens the bypass passage adjustment valve 18 and turns on the heat storage water circulation means 3. It is configured to switch to a partial flow state. FIG. 3 shows a case where the heat storage water circulation means 3 is partially switched to the flow state.

In FIG. 4, when the temperature detected by the first heat storage water temperature sensor 25 is equal to or higher than a second set temperature (for example, 75 ° C.) higher than the first set temperature, the heat supply device 4 is operated to perform a hot water supply operation. Show.
The operation control device 48 switches the regenerative water circulation means 3 to the full flow state, operates the cooling water circulation pump 8 to flow the cooling water A2 through the exhaust heat exchanger 5, and performs the regenerative water flow rate adjustment control. It is configured. Further, similarly to the case shown in FIG. 2, the operation control device 48 is configured to perform hot water storage temperature storage water flow rate control and hot water supply control.
In this case, since the detected temperature of the first heat storage water temperature sensor 25 is equal to or higher than the second set temperature (for example, 75 ° C.), even if the heat storage water flow rate adjustment control is performed, the detection temperature of the cooling water return temperature sensor 11 May become higher than the set temperature range. Therefore, the operation control device 48 opens the heat storage water return adjustment valve 47 to operate the heat storage tank bypass passage flow means, and adds the heat storage tank bypass passage to the high-temperature heat storage water A1 taken out from the upper portion of the heat storage tank 1. The low-temperature heat storage water A1 from 45 is mixed and the temperature of the heat storage water A1 flowing through the exhaust heat exchanger 5 is lowered.

FIG. 5 shows a case where the hot water supply operation is performed by operating the heat supply device 4 when the temperature detected by the first heat storage water temperature sensor 25 is equal to or lower than a first set temperature (for example, 60 ° C.).
The operation control device 48 opens each of the first heat storage water flow rate adjustment valve 27, the second heat storage water flow rate adjustment valve 30, and the bypass passage adjustment valve 18 to switch the heat storage water circulation means 3 to a partially flowing state. The cooling water circulation pump 8 is operated to cause the exhaust heat exchanger 5 to flow the cooling water A2, and the heat storage water flow rate adjustment control is performed. Then, the operation control device 48 is configured to open the fuel gas adjustment valve 18 and heat the auxiliary heating means 14. Further, similarly to the case shown in FIG. 2, the operation control device 48 is configured to perform hot water storage temperature storage water flow rate control and hot water supply control.

When the hot water supply operation is performed by operating the heat supply device 4, switching of each state shown in FIGS. 3 to 5 will be described.
First, when the heat storage water A1 having a temperature equal to or higher than the second set temperature is stored in the heat storage tank 1, a hot water supply operation is performed in the state shown in FIG. When the detected temperature of the first heat storage water temperature sensor 25 is lowered by performing this hot water supply operation and the temperature detected by the first heat storage water temperature sensor 25 becomes lower than the second set temperature, the state shown in FIG. Switch to the state shown in, and perform hot water supply operation. When the detected temperature of the first heat storage water temperature sensor 25 is further lowered by performing this hot water supply operation and the temperature detected by the first heat storage water temperature sensor 25 becomes lower than the first set temperature, the state shown in FIG. 5 is switched to the state shown in FIG.
In this way, the respective states shown in FIGS. 3 to 5 are switched, but the auxiliary heating means 14 is not heated as in the states shown in FIGS. 3 and 4. While performing the hot water supply operation as much as possible only with the exhaust heat of the heat supply device 4, the auxiliary heating means 14 is heated only when the exhaust heat of the heat supply device 4 alone cannot cover the hot water supply load as shown in FIG. I try to let them. Therefore, it is possible to perform hot water supply while effectively utilizing the exhaust heat of the heat supply device 4 to save energy. Further, when the temperature of the heat storage water A1 is equal to or higher than the first set temperature (for example, 60 ° C.), the heat storage water A1 is not allowed to flow through the auxiliary heating unit 14, thereby preventing heat dissipation in the auxiliary heating unit 14.

(Driving operation)
In the chasing operation, the operation control device 48 operates the bath water circulation pump 40 to supply the bath water A4 from the bathtub 22 to the chasing heat exchanger 23, and the bath water is heated in the chasing heat exchanger 23. A4 is heated and the heated bathtub water A4 is returned to the bathtub 22. The reheating operation is different from the hot water supply operation only in the operation of dissipating the heat storage water A1 in the reheating heat exchanger 23.
That is, in each state of the hot water supply operation shown in FIGS. 2 to 5, instead of passing the hot water supply water A3 to the hot water supply heat exchanger 21, as shown in FIG. It is made to flow through the heat exchanger 23 for the burning. The state shown in FIG. 6 corresponds to the state shown in FIG. 5, and although not shown, there are states corresponding to the states shown in FIGS.

In the reheating operation, the first set temperature and the second set temperature in the hot water supply operation can be changed and set based on the reheating setting temperature.
The operation control device 48 continues the chasing operation until the temperature detected by the bathtub water temperature sensor 39 reaches the setting temperature for chasing, and when the temperature detected by the bath water temperature sensor 39 becomes equal to or higher than the chasing temperature, the chasing operation is performed. Is configured to exit.

  Also in this reheating operation, similarly to the hot water supply operation described above, only the exhaust heat of the heat supply device 4 is obtained while performing the reheating operation only by the exhaust heat of the heat supply device 4 without heating the auxiliary heating means 14. Then, since the auxiliary heating means 14 is heated only when the hot water supply load cannot be covered, the bath water A4 is replenished while effectively utilizing the exhaust heat of the heat supply device 4 to save energy. be able to.

(Simultaneous operation of hot water and reheating)
The operation control device 48 is configured to be able to execute a hot water supply / chasing simultaneous operation that simultaneously performs a hot water supply operation and a chasing operation.
In this hot water supply / chasing simultaneous operation, the operation control device 48 simultaneously performs the hot water supply operation and the chasing operation described above. For example, the hot water supply operation in the state shown in FIG. 5 and the chasing operation in the state shown in FIG. 6 are performed simultaneously.

(Heating operation)
FIG. 7 illustrates a case where the heating operation is performed by operating the heat supply device 4 when the temperature detected by the first heat storage water temperature sensor 25 is equal to or higher than the heat storage water set temperature for heating (for example, 60 ° C.).
The operation control device 48 opens the first heat storage water flow rate adjustment valve 27 and closes each of the second heat storage water flow rate adjustment valve 30 and the bypass path adjustment valve 18 to bring the heat storage water circulation means 3 into a full flow state. The cooling water circulation pump 8 is switched and the exhaust heat exchanger 5 is caused to flow the cooling water A2, and the heat storage water flow rate adjustment control is performed. At this time, since the second heat storage water flow rate adjustment valve 30 is closed, the heat storage water A1 after passing through the exhaust heat exchanger 5 is passed through the exhaust heat exchanger bypass 13 and then heated. It flows through the flow path 41 and flows to the heating radiator 24. In this case, since the temperature detected by the first heat storage water temperature sensor 25 is equal to or higher than the heat storage water set temperature for heating (for example, 60 ° C.), even if the heat storage water flow rate adjustment control is performed, the cooling water return temperature sensor 11 The detected temperature may be higher than the set temperature range. Therefore, the operation control device 48 opens the heat storage water return adjustment valve 47 to operate the heat storage tank bypass passage flow means, and adds the heat storage tank bypass passage to the high-temperature heat storage water A1 taken out from the upper portion of the heat storage tank 1. The low-temperature heat storage water A1 from 45 is mixed and the temperature of the heat storage water A1 flowing through the exhaust heat exchanger 5 is lowered.

  The operation control device 48 opens the thermal valve 43 and continues the flow state in which the heat storage water A1 flows through the heating radiator 24 for a set valve opening time (for example, 3 minutes), and then the thermal valve 43. Is closed for a set valve closing time (for example, 17 minutes) at a set cycle (for example, 20 minutes). It is configured to repeat. Then, when the operation control device 48 continues the flow stop state for a set valve closing time (for example, 17 minutes), as shown in FIG. The heat storage water A <b> 1 after passing through the exhaust heat exchanger 5 is returned to the lower part of the heat storage tank 1 to store heat in the heat storage tank 1. In this way, the heat storage operation can be intermittently performed while performing the heating operation by effectively utilizing the exhaust heat of the heat supply device 4, so that energy saving can be achieved.

  Thus, when the temperature detected by the first heat storage water temperature sensor 25 is equal to or higher than the heat storage water set temperature for heating (for example, 60 ° C.), the auxiliary heating means 14 is not heated and only the exhaust heat of the heat supply device 4 is used. Heating operation can be performed, and the space to be heated can be heated while effectively using the exhaust heat of the heat supply device 4 to save energy.

  Although not shown in FIG. 7, a heat exchanger is provided separately in the vicinity of the heating radiator 24 to allow the high-temperature heat storage water A1 taken out from the upper part of the heat storage tank 1 to flow directly without passing through another path. Therefore, a configuration may be added in which heat is radiated from the heat storage water A1 that flows through the heat exchanger and the heating radiator 24. By adding such a configuration, the heating operation is further controlled by controlling the flow rate of the heat storage water A1 to be passed through the heat exchanger and the heating radiator 24, whether or not to pass it. Can be made easier.

FIG. 8 shows a case where the heating operation is performed by operating the heat supply device 4 when the temperature detected by the first heat storage water temperature sensor 25 is lower than the heat storage water set temperature for heating (for example, 60 ° C.).
As described with reference to FIG. 7, the operation control device 48 opens the first heat storage water flow rate adjustment valve 27 and closes each of the second heat storage water flow rate adjustment valve 30 and the bypass passage adjustment valve 18. Then, the heat storage water circulation means 3 is switched to the full flow state, the cooling water circulation pump 8 is operated, the cooling water A2 is passed through the exhaust heat exchanger 5, and the heat storage water flow rate adjustment control is performed. . In this case, since the temperature detected by the first heat storage water temperature sensor 25 is lower than the heating heat storage water set temperature (for example, 60 ° C.), the temperature detected by the heating forward temperature sensor 42 is the heating set temperature (for example, 60 ° C.). ) May not be met. Therefore, the operation control device 48 opens the heat storage water return adjustment valve 47 to operate the heat storage tank bypass passage flow means, and supplies the heat storage tank bypass passage to the low-temperature heat storage water A1 taken out from the upper portion of the heat storage tank 1. The high-temperature heat storage water A1 from 45 is mixed and the temperature of the heat storage water A1 flowing through the exhaust heat exchanger 5 is increased. Further, the operation control device 48 opens the bypass adjustment valve 18 to store heat when the detected temperature of the heating forward temperature sensor 42 does not reach the heating set temperature (for example, 60 ° C.) even after performing this flow operation. The water circulation means 3 is partially switched to the flow state, and the fuel gas adjustment valve 18 is opened to heat the auxiliary heating means 14.

  In this case as well, as described with reference to FIG. 7, the operation control device 48 continues the flow state for a set valve opening time (for example, 3 minutes), and then sets the flow stop state for a set valve closing time (for example, , 17 minutes) is repeatedly performed at a set cycle (for example, 20 minutes). Then, when the operation control device 48 continues the flow stop state for a set valve closing time (for example, 17 minutes), as shown in FIG. The heat storage water A <b> 1 after passing through the exhaust heat exchanger 5 is returned to the lower part of the heat storage tank 1 to store heat in the heat storage tank 1.

[Another embodiment]
(1) In the above embodiment, the auxiliary heating means 14 is provided in the exhaust heat exchanger bypass passage 13, but the auxiliary heating means 14 may not be provided.

(2) In the said embodiment, although the 1st thermal storage water temperature sensor 25 is provided in the circulation path 2, it is also possible to install directly in the upper part of the thermal storage tank 1, for example.

(3) In the above embodiment, the hot water supply operation is performed by any of the operations illustrated in FIGS. 2 to 5, but it is possible to appropriately change the operation for performing the hot water operation. It is. Moreover, it can change suitably what kind of operation is performed also about each of a chasing operation and heating operation.

(4) In the above embodiment, simultaneous operation can be performed for the hot water supply operation and the follow-up operation, and only the heating operation can be performed alone, but the hot water supply operation and the follow-up operation are also performed for the heating operation. Simultaneous operation with either one or both may be possible.
For example, in FIG. 7, by opening the second heat storage water flow rate adjustment valve 30, a part of the heat storage water A <b> 1 after passing through the exhaust heat exchanger 5 is passed through the heating flow path 41. The remaining heat storage water A <b> 1 is passed through the reheating heat exchanger 23.

(5) In the above-described embodiment, the heat dissipation heat exchanger 6 includes the hot water supply heat exchanger 21, the reheating heat exchanger 23, and the heating radiator 24. The number of exchangers 6 can be changed as appropriate.

(6) In the said embodiment, although the example which provided the heat exchanger 21 for hot water supply and the heat exchanger 23 for reheating in series was shown, the heat exchanger 21 for hot water supply, the heat exchanger 23 for reheating, Can be provided in parallel.
For example, as shown in FIG. 9, a circulation passage 49 is provided in parallel with the portion of the circulation path 2 where the hot water supply heat exchanger 21 is provided. A soaking heat exchanger 23 is provided. In this way, each of the hot water supply heat exchanger 21, the reheating heat exchanger 23, and the heating radiator 24 can be provided in parallel. The additional flow passage 49 is provided so as to branch from the downstream side of the heating heat passage 41 in the exhaust heat exchanger bypass passage 13 to join the circulation passage 2, so that the exhaust heat exchange is performed. A part of the bypass unit 13 is also used. The reheating flow path 49 is provided with a reflow flow adjustment valve 50 for adjusting the flow rate of the heat storage water A1 passing through the reheating heat exchanger 23. FIG. 9 shows the state of the heat storage operation.

  The present invention is provided with heat storage water circulation means for circulating the heat storage water taken out from the heat storage tank and returning it to the heat storage tank, and circulating in the circulation path by the exhaust heat transfer fluid for transferring the exhaust heat of the heat supply device. An exhaust heat heat exchanger that heats the heat storage water flowing through the path, and a heat dissipation heat exchanger that dissipates the heat storage water after passing through the exhaust heat exchanger, are provided with the required temperature and flow rate. The present invention can be applied to various heat storage and heat dissipation systems that can supply heat storage water to the heat exchanger for heat dissipation.

The figure which shows the state of the thermal storage thermal radiation system in thermal storage operation The figure which shows the state of the thermal storage thermal radiation system in hot water supply operation The figure which shows the state of the thermal storage thermal radiation system in hot water supply operation The figure which shows the state of the thermal storage thermal radiation system in hot water supply operation The figure which shows the state of the thermal storage thermal radiation system in hot water supply operation The figure which shows the state of the thermal storage heat radiation system in the chasing operation The figure which shows the state of the thermal storage thermal radiation system in heating operation The figure which shows the state of the thermal storage thermal radiation system in heating operation The figure which shows the state of the thermal storage thermal radiation system in another embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat storage tank 2 Circulation path 3 Heat storage water circulation means 4 Heat supply device 5 Waste heat exchanger 6 Heat radiation heat exchanger 13 Waste heat exchanger bypass path 14 Auxiliary heating means 20 Hot water supply path 21 Hot water supply heat exchanger 22 Bathtub 23 Reheating heat exchanger 24 Heating radiator 27 Heat storage water flow rate adjustment means (first heat storage water flow rate adjustment valve)
45 Heat storage tank bypass passage 47 Heat storage tank bypass passage means (heat storage water return regulating valve)
A1 Thermal storage water A2 Cooling water as exhaust heat carrier fluid A3 Water supply for hot water supply A4 Bath water

Claims (10)

A heat storage tank for storing the heat storage water, and a heat storage water circulation means for circulating the heat storage water taken out from the heat storage tank in the circulation path and returning it to the heat storage tank,
The circulation path passes through the exhaust heat heat exchanger that heats the heat storage water flowing through the circulation path with the exhaust heat carrier fluid that conveys the exhaust heat of the heat supply device, and the exhaust heat heat exchanger. It is a heat storage and heat dissipation system provided with a heat exchanger for heat dissipation that dissipates the heat storage water after,
An exhaust heat exchanger bypass path is provided for bypassing the exhaust heat exchanger and passing the heat storage water taken out from the heat storage tank into the circulation path to the heat dissipation heat exchanger,
The heat storage water circulation means has a whole flow state in which the heat storage water is circulated in a form in which the entire amount of the heat storage water taken out from the heat storage tank is passed through the exhaust heat exchanger, and one of the heat storage water taken out from the heat storage tank. A heat storage and radiating system configured to be switchable to a partially flowing state in which the heat storage water is circulated in a form in which the section is passed through the exhaust heat exchanger bypass path.   The heat storage and heat dissipation system according to claim 1, wherein auxiliary heat means capable of performing a heating operation for heating the stored heat storage water is provided in the exhaust heat exchanger bypass path. The heat storage water circulation means is configured to take out the heat storage water from the upper part of the heat storage tank and return the heat storage water to the lower part of the heat storage tank,
The heat storage water circulating means is switched to the full flow state to store the exhaust heat of the heat supply device in the heat storage tank, and the heat storage water circulation means is set to the full flow state or the partial flow state. The operation control means which can perform the heat radiation operation which controls whether to switch and heat-activate the auxiliary heating means and to radiate the heat storage water in the heat radiating heat exchanger is provided. Heat storage and heat dissipation system. A cooling water circulation means for circulating cooling water as the waste heat transfer fluid between the waste heat heat exchanger and the heat supply device;
A heat storage water flow rate adjusting means capable of adjusting the flow rate of the heat storage water flowing through the exhaust heat exchanger in the circulation path;
The operation control means causes the heat storage water flow rate adjustment means to adjust the exhaust heat so that the temperature of the cooling water returned from the exhaust heat exchanger to the heat supply device is within a set temperature range. The heat storage and heat dissipation system according to claim 3, wherein the heat storage water flow rate adjustment control for adjusting a flow rate of the heat storage water flowing through the heat exchanger is performed.   When the operation control means performs the heat storage water flow rate adjustment control in the heat radiation operation, the heat storage water circulation means can be used when the heat storage water at the required flow rate can be supplied to the heat dissipation heat exchanger. The heat storage water circulating means is switched to the partial flow state when switching to the full flow state and when the heat storage water at the required flow rate cannot be supplied to the heat-dissipating heat exchanger. The heat storage and heat radiation system according to claim 4.   When the operation control means can supply the heat storage water at the required temperature to the heat dissipation heat exchanger when the heat storage water circulation means is switched to the partial flow state in the heat dissipation operation, the auxiliary 6. The auxiliary heating means is configured to be heated when the heating means is not heated and when the heat storage water at the temperature required for the heat radiating heat exchanger cannot be supplied. The heat storage and heat dissipation system according to any one of the above. A heat storage tank bypass for connecting a return part for returning the heat storage water to the lower part of the heat storage tank in the circulation path and an extraction part for taking out the heat storage water from the upper part of the heat storage tank;
A heat storage tank bypass passage flow means capable of performing a flow operation for flowing at least a portion of the heat storage water after passing through the heat dissipation heat exchanger to the heat storage tank bypass passage;
The heat storage according to any one of claims 3 to 6, wherein the operation control means is configured to control whether or not the heat storage tank bypass passage flow means is operated in the heat radiation operation. Heat dissipation system.   As the heat-dissipating heat exchanger, the hot-water supply heat exchanger that uses hot-water supply water supplied to the hot-water supply channel as the heat-dissipation target, and the bathtub water circulated between the bathtubs is the heat-dissipation target. The heat storage and heat radiation system according to any one of claims 1 to 7, wherein at least one of a heat exchanger for heating and a heat radiator for heat radiation whose indoor air is heated is provided. The hot water supply heat exchanger and the reheating heat exchanger are provided in series so that the heat storage water after passing through the reheating heat exchanger flows through the hot water supply heat exchanger,
The heat storage and heat radiation system according to claim 8, wherein one or both of the hot water supply heat exchanger and the reheating heat exchanger and the heating radiator are provided in parallel.   The heat storage and heat radiation system according to claim 8, wherein the hot water supply heat exchanger and the reheating heat exchanger are provided in parallel.

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