JPS586364A - Solar heat collector - Google Patents

Abstract

PURPOSE:To improve the rate of utilization of solar heat for heating and for the supply of hot water by a method wherein a hot water storage tank heated through a heat exchanger and a heat accumulation tank storing a heat medium from a heat collector are provided and the heat medium is circulated through the hot water storage tank and then through the heat accumulation tank for heating. CONSTITUTION:In a heat collecting circuit 1, the heat medium which has absorbed solar heat at the heat collector during its circulation through the circuit 1 is transferred to the upper part of the heat accumulation tank 6 for heating, by means of a circulation pump 5 through a heat exchanger provided in the hot water storage tank 3 and is returned to the heat collector 2 from the lower part of the tank 6. Further, in an auxiliary heating circuit 15, the heat medium is circulated between an auxiliary heat source machine 14 and an indoor radiator 13 through a circulation pump 16. In addition, in a hot water supply circuit 17 provided with a water supply port 18 and a hot water supply port 19, hot water in the hot water storage tank is supplied for service after it is reheated by the auxiliary heat source 14 where necessary. Consequently, it becomes possible to store high temperature heat in the storage tank 3 even in winter in which hot water heating is required and to maintain the rate of utilization of solar heat at a high level.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention C1 relates to a solar heat collection device that collects and stores solar heat and supplies heat to a heating device or a hot water supply device. Towards - ] - To stir.

It is already known that a heat medium heated by solar heat can be used to operate a heating device or to supply hot water. Hot water used for hot water supply is light if heated to about 40 to 50''C, and for space heating, relatively high temperature hot water is required.

For this reason, in the 2-tank 2 heating hot water storage heat storage system, heating uses the heat medium stored in the heating heat storage tank directly, and hot water is heated in the hot water storage tank in order to use clean hot water. Hot water heated through an exchanger is used, and the temperature of the hot water storage tank is lower than that of the heating storage tank, especially in winter.
When the amount of radiation per shot was relatively small, the temperature was significantly lower.

The present invention employs a two-tank heat storage system that has a hot water storage tank that heats the hot water via a heat exchanger and a heating heat storage tank that stores the heat medium. This invention provides a solar heat collecting device that aims to raise the temperature of a hot water storage tank, especially in winter, by circulating hot water in a hot water tank, and to improve the solar heat contribution rate for both heating and hot water supply. Examples will be explained together with drawings.

Reference numeral 1 denotes a heat collection circuit, in which solar heat is absorbed by a heat collector 2 by circulating a heat medium, and the heated heat medium passes through a heat exchanger 4 provided in a hot water supply tank 3, and then passes through a heat exchanger 4 installed in a hot water storage tank 3. In step 5, the heat is sent under pressure to a part of the heating heat storage tank 6, stored in the heating heat storage tank 6, returns to the heat collector 1 from the F part, and repeats the cycle.

7 is a distern that supplies a heat medium and absorbs thermal expansion of the heat medium. Each device is equipped with a single-sensitivity detection sensor, 8 is a thermometer installed in the collector, 9 is a thermometer installed at the bottom of the hot water supply tank 3, and 10 is a thermometer installed at the bottom of the heating heat storage tank 6. It is a thermometer, and each win is awarded to a control section (not shown). Reference numeral 11 denotes a solar heating circuit, which circulates the heat medium stored in the heating heat storage tank 6 between it and a guide radiator 13 by means of a circulation pump 12 . Reference numeral 14 is an auxiliary heat source device that assists in heating and hot water supply when solar heat is insufficient. 15
is an auxiliary heating circuit, which is connected to the auxiliary heat source unit 14 by the circulation pump 16.
and circulates through the indoor radiator 13. Id2 to indoor radiator 13
Two heat exchangers are installed independently, one for solar heating on the upstream side of the wind flow in the radiator, and one for auxiliary heat source heating on the downstream side of the air flow, and the hot water from each of the heat source machines is is circulated to perform solar heating, auxiliary heating, and combined heating in which both are operated. 17ij is a hot water supply circuit, 18 is a water supply IZI, 19 is a hot water supply 1-1, hot water heated by the heat exchanger 4 in the hot water supply tank 3 is sent to the auxiliary heat source device 1 as necessary.
4, the water is heated and hot water is supplied. 20 is an air bleed valve installed in the hot water supply circuit, and 21 is a safety valve. The present invention has the above configuration, and the operation will be described next.

First, the operation of the heat collecting circuit 1 will be described. During the winter heating and hot water supply season, the thermostat 8 of the heat collector 2 and the heating heat storage tank 6 (hereinafter referred to as B)
The heat collecting circuit is operated by the circulation pump 6 based on the difference in temperature between the thermostat 1o and the thermostat 1o (referred to as a tank). When sunlight comes out and heat is collected by the differential temperature thermometer, the heat medium heated in the heat collector 2 passes through the heat exchanger 4 of the hot water storage tank 3 (hereinafter referred to as A tank), The hot water in A is heated, then directly stored in tank B to raise the temperature of the heat medium in tank B, and returned to riverside heat collector 2 where it is heated and then circulated. At this time, if the amount of solar radiation is relatively large compared to the temperature of both tanks, tank A will be heated first, and tank B will be kept at a sufficient temperature because the temperature of the heat medium after heating is indirect heat exchange.
The temperature of both tanks also rises, and if sunlight continues and circulation continues, the temperature range will reach almost the same level regardless of the difference in temperature between the two tanks. Next, when the amount of 1" is relatively small, if the tank group is lower than tank B,
The tank group mainly increases. If both tanks are at a common temperature level, both tanks will rise slightly, and if the tank base is high, tank B will mainly rise. When the appearance of clouds is uneven and there is intermittent sunlight, the operation of the heat collection circuit becomes m1 condensation, and the heat medium with a relatively large temperature difference circulates in a FetH manner, but in this case as well. It will rise to the common taps of both tanks. That is, in winter, heat is collected based on the temperature difference between tank B and tank B, but since tank A is first warmed by indirect heat exchange, the temperature of not only tank B but also the human tank is sufficiently raised. Next, during the summer and intermediate hot water supply seasons, the heat collection circuit operates based on the difference in temperature between the thermostat 8 of the heat collector 2 and the thermostat 9 of the tank base by switching a control section (not shown). First, if the amount of solar radiation is relatively large compared to the temperature of both tanks, the temperature of both tanks is raised in the same way,
If there is continuous solar radiation, the temperature will reach around the same temperature level in the high temperature range.

When the amount of solar radiation is relatively low, if the temperature of tank B is at the same level or lower than that of the tank base, the temperature of both tanks will be raised at the same time because the tank bases are operated based on the temperature difference between the tank bases. When tank B is at a higher temperature, the temperature of the tank base will rise, but the temperature of tank B will not. Depending on the temperature, heat may transfer from tank B to the tank base, causing tank B to drop.
Tank B is not used directly during the hot water supply season, so it contributes to hot water supply through heat transfer to the tank base. In reality, regardless of the amount of solar radiation, if the heat collecting circuit is activated, heat will always be transferred from tank B to the person, and the hot water storage tank capacity will essentially increase to 2 tanks. .

Next, the heating circuit will be explained. If you use 21 (heat exchanger (preheater type)) as an indoor radiator, the shortfall in solar heating can be covered by auxiliary heating, so it is used to maintain the temperature at which solar hot water can contribute even slightly to heating, that is, for solar heating. Solar heating is performed using hot water at a temperature that provides more energy than the electricity bill for the circulation pump, usually around 30"C, and auxiliary heating is also operated to compensate for the lack of radiator capacity and hot air temperature. It becomes a combined heating.p
Control unit and indoor radiator 13 (not shown)
When the heating operation is started by operating the operation part of When the circulation pump 12 is operated, the heat medium is circulated to the indoor radiator 13, and the temperature of the heat medium is 7-j. The hot water heated by the auxiliary heat source device 14 is circulated to the indoor radiator by the operation of the circulation pump 16, and auxiliary heating is performed.1 When the heat medium temperature reaches around 60°C or higher, only solar heating is performed. is sufficient, so the auxiliary heating circuit 15 is stopped.On the other hand, when the heat medium temperature falls below 30°C, the solar heating zone 11 is stopped and only the auxiliary heating circuit 16 is operated. When an indoor radiator is used, the solar heating area is wide and the temperature of the heat medium in the heating heat storage tank 6 is low.

Next, the intrauterine circuit 17 is connected to a hot water storage tank 3 heated by solar heat.
Hot water is discharged from the hot water supply port 19, but if the hot water temperature is not sufficient for the desired hot water supply temperature, the temperature will be raised by the auxiliary heat source device 14 and hot water will be supplied.

In the summer and mid-season, the number of heat collectors is set to a certain level for the heating system, so the temperature of the hot water supply tank 3 is usually high, and most of the time hot water is supplied by solar heat. In the winter, the heating and hot water supply needs are less than in the middle of the summer, or as mentioned in the explanation of the heat collection circuit, the temperature of the VC1 heating storage tank 6 and the water supply tank 13 is also quite low. :W, t, Since the supply temperature is 40 to 50°C, which is normal light, the proportion of solar hot water supply is also abysmal.

When necessary, such as when there is little sunlight, the water is heated and heated using auxiliary heating.

As shown in [2], in the present invention U1.2/R TO-NET heating type, one tank uses a heat exchanger and the other tank uses a simple extraction heat storage method, resulting in a hot water storage capacity of I'j8 hinoki. By first circulating the heat medium from the heat collector to the tank that houses the heat exchanger, the hot water storage tank can be used to store high-temperature heat even during winter heating and hot water supply. , it is possible to maintain a high contribution rate of solar water heating even in winter, and by using a preheater-type indoor radiator for heating, solar heating can be achieved in a low-temperature trench.
This increases the iJ function, expands the temperature range in which the heating storage tank can be used for heating, and maintains a high contribution rate to solar heating. If there is a lot of heat collection in the history and the tank temperature becomes high, both tanks will often reach a similar high temperature, and if only the temperature becomes extremely high, the temperature from the comparison tank will increase. The present invention provides a system that improves the contribution rate of solar heat water heating and also increases the contribution rate of solar heat in a combined manner with a simple circuit that does not require a switching mechanism for the heat collection circuit, such as reducing heat radiation loss.

[Brief explanation of drawings]

Is the drawing an implementation of the solar heat collector of the present invention? It is a solar heating hot water supply/stem configuration diagram showing lJ. Q 1... Heat collection circuit, 2... Heat collector, 3... Hot water supply tank, 4... Heat exchanger, 5, 12.16...
・Circulation pump, 6...Heating heat storage tank, 8,9.10・
...Thermo, 13... Indoor radiator, 14...
...Auxiliary heat source machine.

Claims (2)

[Claims] (1) A heat collector that absorbs solar heat into a heat medium;
A hot water storage tank heated with this heat medium via a heat exchanger;
1. A heating heat storage tank which stores the heat medium (LLH) and supplies heat to an indoor radiator of a heating device which serves as an auxiliary heat source, etc.; A heat collecting circuit is configured in which these devices are connected by piping in a single row, and a heat medium transfer means is provided for circulating a heat medium to the heat collector, hot water storage tank, and heating heat storage tank (11111). solar heat collector. (2) The solar heat collector according to claim 1, wherein the heat medium of the heating heat storage tank is supplied to an indoor radiator in which solar heat and hot water from an auxiliary heat source can be independently circulated.