JP4642721B2 - Solar heat collection system - Google Patents

Description

  The present invention relates to a solar heat utilization method and a solar heat collection system, and more particularly to a solar heat utilization method and a solar heat collection system that can collect and effectively use solar heat.

For example, the roof watering is known as one of the thermal environment adjustment methods for mitigating the rise in the roof surface temperature. An example of roof watering is as follows. It has a water storage tank that stores rain that falls on the roof, and when it is clear, the stored rainwater is sprinkled on the roof and a part of the rainwater is evaporated on the roof surface to alleviate the rise in the roof surface temperature. The portion that has not evaporated is collected in the water storage tank and circulated again (for example, see Non-Patent Document 1). This is an analogy of a mechanism that stores rain that falls on natural soil and evaporates the stored rainwater when it is clear, thereby suppressing the rise in the surface temperature of the soil.
Masanori Onishi, 4 others, “Abstracts of the Annual Meeting of the Architectural Institute of Japan”, Architectural Institute of Japan, August 2002, p551-552

  In the method of mitigating the rise in the roof surface temperature by evaporating a part of the water sprayed on the roof on the roof surface, solar heat was treated as an obstacle and was thrown away into the atmosphere by water evapotranspiration.

  In view of the above-described problems, an object of the present invention is to provide a solar heat utilization method and a solar heat collection system that can collect solar heat and use it effectively.

For example, referring to FIG. 1 (FIGS. 5 and 6), the solar heat utilization method for achieving the above object supplies the first water w1 to the solar radiation receiving surface 18 (58, 68) that receives sunlight. Then, using the heat of the first water w1 whose temperature has increased and the energy supplied from the outside, the step of increasing the temperature of the first water w1 than the first water w1 whose temperature has increased Furthermore, the process of producing | generating the 2nd water w2 whose temperature rose; The process of storing the 2nd water w2 is provided.

  If comprised in this way, it will produce | generate the 2nd water whose temperature rose further rather than the 1st water whose temperature rose using the heat | fever of the 1st water whose temperature rose, and the energy supplied from the outside. Therefore, for example, water having a temperature that can be easily used for a hot water pool can be obtained, and solar heat can be collected and used effectively. Moreover, since the second water is stored, the heat energy converted into the second water can be used at an arbitrary time.

In order to achieve the above object, a solar heat collecting system according to the first aspect of the present invention is a roof scattering system that supplies first water w1 to a surface 18 of a roof that receives sunlight as shown in FIG. A water pipe 11; and a roof water collecting pipe 19 for collecting the first water w1 flowing along the surface 18 of the roof . Further, as described in claim 7, the solar heat collecting system includes a first water tank 21 for storing the first water w1 collected in the roof water collecting pipe 19 , for example, as shown in FIG. A temperature raising device 35 that generates the second water w2 having a temperature higher than that of the first water w1, using the heat of the first water w1 in the water tank 21 as a heat source; and a second water tank for storing the second water w2 22 may be provided.

  If comprised in this way, since it is equipped with the temperature rising apparatus which produces | generates 2nd water whose temperature is higher than 1st water using the heat | fever of 1st water in a 1st water tank as a heat source, it utilizes for a hot water pool, for example Solar heat can be collected and used effectively, for example, water at an easy temperature can be obtained. Moreover, since the 2nd water tank which stores the 2nd water is provided, the thermal energy converted into the 2nd water can be utilized for arbitrary time.

In addition, the solar heat collection system according to the invention described in claim 5 is, for example, as shown in FIG. 2, the solar heat collection system 10 according to any one of claims 1 to 4 (see, for example, FIG. 1). ), The water sprinkling pipe 11 is composed of a clear light whose edge 11s on the roof water collecting pipe 19 side is lower than the edge 11t on the opposite side.

  If comprised in this way, compared with the case where several small holes for discharge are formed in a pipe, for example, the 1st water can be supplied to the surface of a roof without a spot, the amount of solar heat collection, and the cooling effect of the surface of a roof Can be increased.

Moreover, solar Tonetsu system according to the first aspect of the present invention, for example, as shown in FIGS. 3 and 4, roof sprinkling pipe 11, virtually the surface 18 of the roof into a plurality of zones 18A~18F is configured to be capable of supplying the first water w1 divided into divided the ward min; first feeding zone change means 13a for switching the zone for supplying water w1, 13b, ··· (14a, 14b, ···) Is further provided.

  When configured in this way, it becomes possible to make the zone where the temperature of the surface of the roof has been heat-collected and the temperature decreased, receive sunlight and rise again until the next heat is collected, and be able to collect heat again. Solar heat can be continuously collected.

Further, the solar heat collecting system according to the invention described in claim 8 is the same as the solar heat collecting system 10 described in claim 6 or 7 , as shown in FIG. The heat exchanger 36 which performs heat exchange with the heat of the water w2 of 2 is provided.

  If comprised in this way, the heat | fever formed in 2nd water can be transmitted to to-be-heated water (for example, water of a warm water pool), without reducing the quality of to-be-heated water.

Moreover, the solar heat collection system which concerns on invention of Claim 9 is a temperature rising apparatus in the solar heat collection system 10 of any one of Claim 6 thru | or 8 , as shown, for example in FIG. 35 is constituted by a water heat source heat pump chiller that generates the third water w3 having a temperature lower than that of the first water w1 by using the heat of the first water w1 in the first water tank 21 as a heat source; A third water tank 23 for storing a large amount of water w3; a temperature detector 16 for detecting the temperature of the roof surface 18; and the temperature of the roof surface 18 being higher than the temperature of the first water w1 in the first water tank 21. And a controller 15 that operates the water source heat pump chiller 35 as a chiller when the temperature is low.

  If comprised in this way, when the temperature of the surface of a roof is lower than the temperature of the 1st water in a 1st water tank, since a water-source heat pump chiller is operated as a chiller, the facility of a solar heat collection system is utilized. Cold water can be produced efficiently. Here, the “cold water” is water cooled to a temperature suitable for use on the load side, which is a cooling medium used on the load side having a cooling load.

Further, as a solar heat collection system according to another aspect , for example, as shown in FIG. 5, a heat collection water supply for guiding the first water w1 to a snow melting pipe 53 disposed under a road surface 58 that receives sunlight. Tube 52; first water tank 21 for storing first water w1 flowing through snow melting pipe 53; and heat of first water w1 in first water tank 21 as a heat source than first water w1. It is good also as providing the temperature rising apparatus 55 which produces | generates the 2nd water w2 with high temperature; and the 2nd water tank 22 which stores the 2nd water w2.

  If comprised in this way, since the temperature rising apparatus which produces | generates 2nd water whose temperature is higher than 1st water using the heat | fever of the 1st water in a 1st water tank as a heat source is provided, there is no snow on a road surface, and it melts snow Even when it is not necessary, it can be used for collecting solar heat and the system can be used effectively.

Further, as a solar heat collection system according to still another aspect , for example, as shown in FIG. 6, a road surface sprinkling pipe 61 that supplies the first water w <b> 1 to the road surface 68 that receives sunlight; A road surface water collecting pipe 63 for collecting the first water w1; a first water tank 21 for storing the first water w1 collected in the road surface water collecting pipe 63; and a heat source for heat of the first water w1 in the first water tank 21 It is good also as providing the temperature rising apparatus 55 which produces | generates the 2nd water w2 whose temperature is higher than the 1st water w1, and the 2nd water tank 22 which stores the 2nd water w2.

  If comprised in this way, since the temperature rising apparatus which produces | generates 2nd water whose temperature is higher than 1st water using the heat | fever of the 1st water in a 1st water tank as a heat source is provided, there is no snow on a road surface, and it melts snow Even when it is not necessary, it can be used for collecting solar heat and the system can be used effectively.

Moreover, solar Tonetsu system according to the present invention is a solar Tonetsu system according to any one of claims 1 to 9, wherein the first water may I rainwater der.

  If comprised in this way, it will become a solar thermal heat collection system which uses rainwater which is a natural resource effectively, will contribute to global environment protection, and will become a low running cost system.

According to the present invention, it is possible to make the zone where the temperature of the surface of the roof is lowered and the temperature is lowered, receive sunlight and increase the temperature again until the next time the heat is collected, Solar heat can be continuously collected. In addition, when using the energy that the temperature is supplied from the heat and external first water rises, the first further temperature than the water temperature increases to generate a second water rises, Solar heat can be collected and used effectively regardless of the season. Moreover, when storing 2nd water, the thermal energy converted into 2nd water can be utilized for arbitrary time.

  Embodiments of the present invention will be described below with reference to the drawings. In each drawing, the same or corresponding members are denoted by the same or similar reference numerals, and redundant description is omitted. In FIG. 1, a broken line around the control device 15 represents a control signal.

  First, with reference to FIG. 1, the roof watering system 10 as a solar heat collection system which concerns on the 1st Embodiment of this invention is demonstrated. FIG. 1 is a schematic system diagram of a roof watering system 10. The roof watering system 10 includes a roof watering pipe 11, a roof water collecting pipe 19, a rainwater tank 21 as a first water tank, a thermal heat storage tank 22 as a second water tank, and a cold heat storage tank as a third water tank. 23, a middle water tank 24 as a fourth water tank, a heat pump chiller 35 as a temperature raising device, a roof temperature sensor 16 as a temperature detector for detecting the temperature of the roof surface 18, and a water temperature in the rainwater tank 21. A rainwater tank temperature sensor 17 to be detected and a control device 15 are provided.

  The roof watering system 10 flows the water w1 through the roof surface 18 whose temperature has increased due to solar radiation, thereby collecting solar heat with the water w1 to increase the temperature of the water w1 and cooling the roof surface 18 to reduce the cooling load. It is a system to reduce. And it becomes a system which can improve the efficiency of heat pump 35 by using water w1 whose temperature rose as heat source water of heat pump 35. Since the roof watering system 10 collects solar heat using the water w1 as a medium, it is preferable not to evaporate the water w1 on the roof surface 18 as much as possible. In this respect, the roof watering system 10 is a technology that has a different concept from the conventional roof watering technology that cools the roof by the latent heat of vaporization of water.

  The roof sprinkler pipe 11 is a member that supplies rain water w <b> 1 as the first water to the roof surface 18. The rainwater w <b> 1 supplied from the roof sprinkler pipe 11 is obtained by pumping the water stored in the rainwater tank 21 through the water pump 12 by the heat collecting pump 31. The roof sprinkler pipe 11 is typically provided so as to extend along a line connecting the tops of the roofs. On the other hand, on the downstream side of the roof, a roof water collecting pipe 19 that receives the rainwater w1 that has flowed through the roof surface 18 is provided so as to extend in the same direction as the roof watering pipe 11. The roof water collecting pipe 19 is a member that collects not only the rain water w <b> 1 supplied from the roof water spray pipe 11 to the roof surface 18, but also the rain water that has flowed down when the rain hits the roof surface 18.

  As shown in the cross-sectional view of FIG. 2, the roof water sprinkling pipe 11 typically constitutes a clear (water channel without a canopy). And the low edge 11s which is the edge (downstream side) in which the roof water collecting pipe 19 is arrange | positioned is lower than the high edge 11t which is the edge on the opposite side. In the roof sprinkling pipe 11 configured in this way, when the rainwater w1 is pumped by the heat collecting pump 31 (see FIG. 1) and the water level exceeds the low edge 11s, the water goes over the weir and goes to the roof surface 18. Run water. The roof sprinkler pipe 11 is preferably arranged so that the low edge 11s extending along a line connecting the tops of the roofs is as horizontal as possible. If the low edge 11s is disposed so as to be horizontal, the rainwater w1 can be supplied to the roof surface 18 without any spots. In this way, when the roof watering pipe 11 is made of clear, it is possible to supply rainwater w1 to the roof surface 18 without any spots compared to the case where a perforated pipe having a small hole formed in the pipe is used. .

  Further, as shown in FIG. 3, when the roof surface 18 is virtually divided into a plurality of zones 18A to 18F and the rainwater w1 is supplied to each of the zones 18A to 18F with a time difference, the rainwater w1 flows to generate heat. Since the roof surface 18 that has been deprived and has fallen in temperature receives solar radiation before the next rainwater w <b> 1 is supplied, the temperature rises again, so that the solar heat can be continuously collected. In the example shown in FIG. 3, the roof surface 18 is virtually divided into six equal parts so as to be orthogonal to the direction in which the roof sprinkler pipe 11 extends. For example, if the rainwater w1 is supplied to each of the six zones 18A to 18F every 10 minutes, the rainwater w1 is supplied to each of the zones 18A to 18F every hour, so that management becomes easy. When the roof surface 18 does not have a raised portion such as a goby which is a connection part of the metal roofing, the rainwater w1 overflowing from the low edge 11s of the roof sprinkler pipe 11 is usually the surface of the roof according to the virtual dividing line. It flows to the end without flowing. The temperature of the portion where the rainwater w1 flows in the end spread is lowered, and if the rainwater w1 is continuously supplied to the adjacent zone, the heat collection efficiency of the overlapping portion is lowered. In order to avoid a decrease in heat collection efficiency, when switching the zone through which the rainwater w1 flows, it is preferable that the rainwater w1 flows in a zone other than the adjacent zone (for example, when the rainwater w1 flows in the zone 18A). The zone to be flown next is set as a zone other than the zone 18B).

FIG. 4 shows a configuration around the roof sprinkler 11 for switching the zones 18A to 18F (see FIG. 3) through which the rainwater w1 flows.
Fig.4 (a) is a partial block diagram around the roof sprinkling pipe 11P which is one aspect | mode which has a rainwater supply zone switching structure among the roof sprinkling pipes 11. FIG. The roof sprinkler pipe 11P is divided by the partition plate 11b into the same number of sections 11PA, 11PB,... As the number of the roof surface 18 virtually divided (six divisions in the example shown in FIG. 3). Between the sections 11PA, 11PB,..., The rainwater w1 does not circulate beyond the partition plate 11b. Each of the sections 11PA, 11PB,... Is connected with a pumping pipe 12a, 12b,. Switching pumps 13a, 13b,... That can block the flow of rainwater w1 are disposed in the pumping pipes 12a, 12b,. The switching valves 13a, 13b,... Constitute supply zone changing means. Each of the switching valves 13a, 13b,... Is electrically connected to the control device 15 (see FIG. 1) via a signal cable (not shown), and a signal from the control device 15 (see FIG. 1). And the valve is configured to open and close. In the roof sprinkler pipe 11P, rainwater w1 is pumped to the sections 11PA, 11PB,... Connected to the pumped pipes 12a, 12b,. The rain water w1 in the sections 11PA, 11PB,... With the water level exceeding the low edge 11s is supplied to the roof surface 18.

  FIG.4 (b) is a partial block diagram around the roof water spray pipe 11Q which is another aspect of what has a rainwater supply zone switching structure among the roof water spray pipes 11. FIG. The roof sprinkler pipe 11Q is divided into the same number of sections 11QA, 11QB,... As the number of virtually divided roof surfaces 18 (in the example shown in FIG. 3), the roof water collecting pipe 19 (see FIG. 1). The side (downstream) side walls are movable plates 14a, 14b,... That are bent outwardly for each of the divided sections 11QA, 11QB,. When the movable plates 14a, 14b,... Are bent and the portion that is the upper side comes below the bent portion, the bent portion becomes the low edge 11s. The movable plates 14a, 14b,... Can be moved as described above, for example, with the following structure (not shown). A winch wire is attached to the upper ends of the movable plates 14a, 14b,. To maintain the movable plates 14a, 14b,... In an upright state, tension is applied to the wire. The lower edge 11s appears by releasing the tension of the movable plates 14a, 14b,... Of the sections 11QA, 11QB,... Corresponding to the zones 18A to 18F (see FIG. 3) to which the rainwater w1 is to be supplied. Rainwater w1 can be supplied to the roof surface 18. To return the movable plates 14a, 14b,... To the upright state, a wire may be wound with a winch or the like. The winch is controlled by the control device 15 (see FIG. 1). As the means for moving the movable plates 14a, 14b,..., Known means other than those described above may be used. The movable plates 14a, 14b,... Constitute supply zone changing means. Typically, the pumping pipe 12 is connected to the roof watering pipe 11Q at one place. In the roof sprinkler pipe 11Q, rainwater w1 is supplied to the roof surface 18 (see FIG. 1) from the sections 11QA, 11QB,... Where the low edges 11s appear due to the operation of the movable plates 14a, 14b,. It has become.

  Returning to FIG. 1 again, the description of the roof watering system 10 will be continued. The roof water collecting pipe 19 is typically clear and is a so-called rain gutter. A rainwater collecting pipe 20 is connected to the roof water collecting pipe 19. The rainwater collection pipe 20 is guided to the rainwater tank 21, and is configured such that the rainwater w <b> 1 collected by the roof water collection pipe 19 can be guided to the rainwater tank 21.

The rainwater tank 21 is a water tank that stores rainwater w1 that has flowed through the roof surface 18 and collected solar heat, or rainwater that has collected rain that hits the roof surface 18. It is preferable that the rainwater tank 21 is appropriately insulated from the viewpoint that the rainwater w1 obtained by collecting solar heat can be used at an arbitrary time. The rainwater tank 21 is a water tank surrounded by a frame (concrete) formed by using an underground pit in this embodiment, but is a portable tank made of FRP or steel plate installed on the ground or indoors. It may be a water tank. However, since the wall of the casing generally has a lower heat transmissivity (so-called K value) than the wall of FRP or steel plate, it is preferable to use the rainwater tank 21 as a casing water tank from the viewpoint of facilitating heat insulation construction. The unit of heat transmissivity is kJ / m ² h ° C.

  A heat collecting pump 31 is installed in the rainwater tank 21. As described above, the heat collection pump 31 is a pump that pumps the rainwater w1 in the rainwater tank 21 to the roof sprinkler pipe 11, and is typically a submersible pump. The pumping pipe 12 is connected to the heat collecting pump 31. A rainwater filtration sterilizer 39 that filters and sterilizes rainwater in the rainwater tank 21 is installed on the rainwater tank 21. The rainwater filtered and sterilized by the rainwater filtration sterilizer 39 is stored in the middle water tank 24 and is used as the middle water w4 for toilet cleaning water, planting water, fire prevention water tank water, and the like. The middle water tank 24 is typically a box-shaped water tank. The middle water tank 24 is provided with a middle water pump 34. The rainwater tank 21 is provided with a rainwater heat exchanger 38 that exchanges heat between the heat source water wm of the heat pump chiller 35 and the rainwater w1. The rainwater heat exchanger 38 is provided to cut off the edge between the rainwater w1 and the heat source water wm, thereby preventing the heat pump chiller 35 from being corroded. The rainwater tank 21 is provided with a rainwater tank temperature sensor 17 that detects the temperature of the rainwater w1 in the rainwater tank 21. The rainwater tank temperature sensor 17 is electrically connected to the control device 15 via a signal cable.

  The heat pump chiller 35 introduces, as a heat source, heat source water wm that has been heated and exchanged with rainwater w1 in the rainwater tank 21 and uses electric energy from the outside, and has a higher temperature than the rainwater w1. It is the apparatus which produces | generates the hot water w2 as water of water. Moreover, the heat pump chiller 35 can also generate cold / hot water w3 as third water having a temperature lower than that of the rainwater w1. The cold / hot water w3 is cold water. That is, the heat pump chiller 35 is a device that can be used as both a heat pump and a chiller. The heat pump chiller 35 uses the refrigerant refrigeration cycle to heat water (w2) with heat released when the refrigerant condenses and absorbs heat from the water (w3) when the refrigerant evaporates. This is a unit for cooling water (w3). The heat pump chiller 35 is typically a compression heat pump chiller, and includes a heat source introduction unit 35e that introduces heat source water wm and a water temperature adjustment unit 35c that introduces hot water w2 or cold water w3. The heat source introduction unit 35e functions as an evaporator when the hot water w2 is generated, and functions as a condenser when the cold water w3 is generated. The water temperature adjusting unit 35c functions as a condenser when the hot water w2 is generated, and functions as an evaporator when the cold water w3 is generated. The heat source introduction part 35e is connected to the rainwater heat exchanger 38 in the rainwater tank 21 through the heat source water pipe 41 provided with the heat source water pump 41P. The water temperature adjustment unit 35c has a common inlet pipe 45s connected to the inlet side and a common outlet pipe 45d connected to the outlet side.

  The hot water w <b> 2 heated by the heat pump chiller 35 is stored in the hot heat storage tank 22. It is preferable that the thermal heat storage tank 22 is appropriately insulated from the viewpoint of making it possible to use the hot water w2 whose temperature has been raised by the heat pump chiller 35 at an arbitrary time. In this embodiment, the thermal heat storage tank 22 is a water tank surrounded by a frame (concrete) formed by using an underground pit, like the rainwater tank 21, but is made of FRP installed on the ground or indoors. Or a portable water tank made of steel plate or the like.

  A hot water pump 32 is installed in the hot heat storage tank 22. A hot water inlet pipe 42 s is connected to the hot water pump 32. The other end of the hot water inlet pipe 42s is connected to the common inlet pipe 45s via the inlet switching valve 28. The hot heat storage tank 22 is provided with a hot water outlet pipe 42 d that guides the hot water w <b> 2 whose temperature has been raised by the heat pump chiller 35 to the hot heat storage tank 22. The other end of the hot water outlet pipe 42d is connected to the common outlet pipe 45d via the outlet switching valve 29. The hot water w2 heated by the heat pump chiller 35 and stored in the thermal heat storage tank 22 is guided to the pool heating heat exchanger 36 by, for example, a heat utilization pipe 46, and heated to the water w5 of the hot water pool as heated water. Can be used. Thus, the to-be-heated water is a means for utilizing the heat of the second water (hot water w2). The pool heating heat exchanger 36 is a device that performs heat exchange between the heat of the second water (w2) and the heat of the water to be heated (w5). As is apparent from the figure, the heat pump chiller 35 and rainwater It is different from the heat exchanger 38. If the collected solar heat is heated by the heat pump chiller 35 and used for heating the water w5 of the hot water pool, the collected solar heat can be effectively used throughout the year. In addition, when draining the water w5 of the hot water pool, the pool drain heat recovery heat exchanger 37 may recover the heat of the water w5.

  The cold / hot water w3 cooled by the heat pump chiller 35 is stored in the cold / heat storage tank 23. It is preferable that the cold heat storage tank 23 is appropriately insulated from the viewpoint that the cold water w <b> 3 whose temperature has dropped by the heat pump chiller 35 can be used at an arbitrary time. In the present embodiment, the cold heat storage tank 23 is a water tank surrounded by a skeleton (concrete) formed by using an underground pit, like the rainwater tank 21 and the thermal heat storage tank 22, but on the ground or indoors. It may be a portable water tank made of FRP or steel plate installed.

  A cold / hot water pump 33 is installed in the cold / heat storage tank 23. A cold / hot water inlet pipe 43 s is connected to the cold / hot water pump 33. The other end of the cold / hot water inlet pipe 43 s is connected to the common inlet pipe 45 s via the inlet switching valve 28. The inlet switching valve 28 is a three-way valve to which a common inlet pipe 45s, a cold / hot water inlet pipe 43s, and a hot / hot water inlet pipe 42s are connected. The cold heat storage tank 23 is provided with a cold water outlet pipe 43 d that guides the cold water w <b> 3 whose temperature has been lowered by the heat pump chiller 35 to the cold heat storage tank 23. The other end of the cold / hot water outlet pipe 43d is connected to the common outlet pipe 45d via the outlet switching valve 29. The outlet switching valve 29 is a three-way valve to which a common outlet pipe 45d, a cold / hot water outlet pipe 43d, and a hot / hot water outlet pipe 42d are connected. The chilled water w3 cooled by the heat pump chiller 35 and stored in the chilled heat storage tank 23 is guided to, for example, an air handling unit (not shown) and used for cooling the building or the like.

  The control device 15 controls the operation of the roof watering system 10. That is, the control device 15 controls the operation mode of the heat pump chiller 35 (separate generation of hot water w2 and cold water w3) and start / stop, and starts / stops and switches the inlets of the pumps 31, 32, 33, 34, 41P. The switching operation of the valve 28 and the outlet switching valve 29 is controlled. The control device 15 controls the operation of the switching valves 13a, 13b,... (See FIG. 4A) and the movable plates 14a, 14b,. Moreover, the control apparatus 15 receives the temperature of the rainwater w1 in the rainwater tank 21 from the rainwater tank temperature sensor 17 as a signal, and receives the temperature of the roof surface 18 from the roof temperature sensor 16 as a signal. The roof temperature sensor 16 is typically disposed on the roof surface 18.

  With continued reference to FIG. 1, the operation of the roof watering system 10 will be described. Rain that hits the roof surface 18 due to rainfall flows down the roof surface 18 and flows into the roof water collecting pipe 19. Rainwater that has flowed into the roof water collecting pipe 19 flows through the rainwater collecting pipe 20 and flows into the rainwater tank 21 to be stored. Rainwater stored in the rainwater tank 21 can be used as intermediate water regardless of the water temperature. In order to use as middle water, a part of the rainwater in the rainwater tank 21 is introduced into the rainwater filter sterilizer 39, sterilized and filtered, and then put into the middle water tank 24. The middle water w4 in the middle water tank 24 is pumped to the toilet, planting, fire prevention water tank, etc. by the middle water pump 34 as described above, and is used for toilet cleaning water, watering for planting, water in the fire prevention water tank, etc. The

  When there is solar radiation, the temperature of the roof surface 18 is higher than the ambient temperature, and in the case of a concrete roof, it can reach, for example, about 55 ° C. in summer and about 30 ° C. in winter. The control device 15 receives the signal of the temperature of the roof surface 18 from the roof temperature sensor 16 and the signal of the temperature of the rainwater w1 in the rainwater tank 21 from the rainwater tank temperature sensor 17 as needed. When the temperature is higher than the temperature of the rainwater w1 in the rainwater tank 21 by a first predetermined temperature or more, the heat collecting pump 31 is activated. Here, the “first predetermined temperature” is preferably a temperature at which solar heat is collected even when the power of the heat collecting pump 31 is subtracted, and can be set to 10 ° C., for example. From another point of view, the temperature of the rainwater w1 flowing through the roof surface 18 and returning to the rainwater tank 21 is 2 ° C or higher, preferably 5 ° C or higher than the temperature of the rainwater w1 in the rainwater tank 21 before heat collection. The temperature of the roof surface 18 that is more preferably 8 ° C. or higher is preferably set to the first predetermined temperature.

  When the heat collecting pump 31 is activated, the rainwater w1 flows through the pumping pipe 12 to the roof watering pipe 11, and flows over the low edge 11s (see FIGS. 2 and 4) and flows through the roof surface 18. The rainwater w1 flowing on the roof surface 18 receives heat from the roof surface 18 whose temperature has increased due to solar radiation, and the temperature rises. Conversely, the roof surface 18 is cooled by rainwater w1. Cooling the roof surface 18 reduces the cooling load on the building and extends the life of the roof material.

  The flow rate of the rainwater w1 pumped to the roof sprinkler pipe 11 by the heat collecting pump 31 may be set to an amount of water that prevents the rainwater w1 supplied to the roof surface 18 from evaporating as much as possible. By suppressing the amount of evaporation, more solar heat can be collected. Conversely, if the flow rate of the rainwater w1 pumped to the roof sprinkler 11 is too large, the temperature rise of the rainwater w1 after heat collection is reduced, so the power of the heat collection pump 31 is used to increase the temperature rise as much as possible. Even if this is subtracted, the amount of water should be such that there is a temperature rise that can effectively improve the coefficient of performance (COP) of the heat pump chiller 35. That is, the flow rate of the rainwater w1 pumped to the roof sprinkler pipe 11 is preferably set to a flow rate in which the temperature rise is as large as possible within the range of the flow rate that does not evaporate as much as possible on the roof surface 18. The rainwater w <b> 1 whose temperature has risen due to heat from the roof surface 18 is collected by the roof collecting pipe 19, flows into the rainwater collecting pipe 20, and returns to the rainwater tank 21. As described above, when the roof surface 18 is virtually divided into a plurality of zones 18A to 18F (see FIG. 3) and the rainwater w1 is supplied to each of the zones 18A to 18F with a time difference, solar heat is continuously taken. Can be heated. Thus, solar heat is collected, and the water temperature in the rainwater tank 21 can be set to about 40 ° C. in summer and about 15 ° C. in winter, for example.

  The heat of the rainwater w1 in the rainwater tank 21 whose temperature has risen is used as the heat source water wm of the heat pump chiller 35. When the control device 15 starts the heat pump chiller 35, the heat source water pump 41P, and the hot water pump 32, the heat of the rain water w1 in the rain water tank 21 is transmitted to the heat source water wm via the rain water heat exchanger 38, and the heat source water The heat source water wm is introduced into the heat source introduction part 35e of the heat pump chiller 35 by the pump 41P. On the other hand, when the hot water pump 32 is activated, the hot water w2 in the hot heat storage tank 22 is introduced into the water temperature adjusting unit 35c via the hot water inlet pipe 42s and the common inlet pipe 45s. The hot water w <b> 2 introduced into the water temperature adjustment unit 35 c rises in temperature and returns to the thermal heat storage tank 22. In this way, the temperature of the hot water w2 in the hot heat storage tank 22 is adjusted to a temperature suitable for use. In the present embodiment, the hot water w2 in the thermal heat storage tank 22 is raised to about 50 ° C., and the hot water w2 at about 50 ° C. is heated by, for example, the water w5 of the hot water pool in the pool heating heat exchanger 36. To use at any time.

  Thus, in the roof watering system 10, by supplying the heat source water wm whose temperature has been increased by the collected solar heat to the heat pump chiller 35, the performance of the heat pump chiller 35 compared to the case where the temperature of the heat source water wm is not increased. The coefficient (COP) can be improved. In addition, when the heat pump chiller 35 is operated at night, it contributes to leveling of electric power use, and the heat pump chiller 35 can be operated by using relatively inexpensive night electric power. There is also.

  The roof watering system 10 may be switched to a system that generates cold / hot water w3 when there is no demand for warm heat. When it is set as the system which produces | generates the cold / hot water w3, the one where the temperature of the rainwater w1 in the rainwater tank 21 is as low as possible is preferable. When the roof watering system 10 is switched to a system that generates the cold / hot water w3, the inlet switching valve 28 and the outlet switching valve 29 are switched from the thermal heat storage tank 22 side to the cold heat storage tank 23 side. For example, when the roof surface 18 is cooled by radiation cooling and the temperature of the roof surface 18 becomes lower than the temperature of the water w1 in the rainwater tank 21 by a second predetermined temperature or more, the control device 15 collects heat. The pump 31 is started. Here, the “second predetermined temperature” is preferably a temperature at which the rainwater w1 is cooled by the roof surface 18 even when the power of the heat collecting pump 31 is subtracted, and can be set to 10 ° C., for example. . In addition, also when switching to the system which produces | generates the cold / hot water w3, the control apparatus 15 has received the temperature signal from the roof temperature sensor 16 and the rainwater tank temperature sensor 17 at any time.

  When the heat collecting pump 31 is activated, the rainwater w1 flows through the pumping pipe 12 to the roof watering pipe 11, and flows over the low edge 11s (see FIGS. 2 and 4) and flows through the roof surface 18. The rainwater w1 flowing on the roof surface 18 is cooled by the roof surface 18 whose temperature has been lowered by radiation cooling or the like, and the temperature is lowered. The rainwater w1 cooled by the roof surface 18 is collected by the roof water collecting pipe 19, flows into the rainwater collecting pipe 20, and returns to the rainwater tank 21.

  The heat of the rainwater w <b> 1 in the rainwater tank 21 whose temperature has been lowered is used as heat source water for the heat pump chiller 35. When the control device 15 starts the heat pump chiller 35, the heat source water pump 41P, and the cold water pump 33, the cold heat of the rain water w1 in the rain water tank 21 is transmitted to the heat source water wm via the rain water heat exchanger 38, and the heat source water The heat source water wm is introduced into the heat source introduction part 35e of the heat pump chiller 35 by the pump 41P. On the other hand, when the chilled water pump 33 is activated, the chilled water w3 in the chilled heat storage tank 23 is introduced into the water temperature adjusting unit 35c through the chilled water inlet pipe 43s and the common inlet pipe 45s. The temperature of the chilled water w3 introduced into the water temperature adjusting unit 35c is lowered and returned to the chilled heat storage tank 23. In this way, the temperature of the cold / hot water w3 in the cold / heat storage tank 23 is adjusted to a temperature suitable for use. In the present embodiment, the chilled water w3 in the chilled heat storage tank 23 is lowered to about 7 ° C., and the chilled water w3 at about 7 ° C. is supplied to, for example, an air handling unit (not shown) at an arbitrary time zone. I will use it.

  Thus, in the roof watering system 10, the temperature of the heat source water wm is not lowered by supplying the heat source water wm whose temperature is lowered by using the cold heat of the rain water w1 cooled on the surface of the roof to the heat pump chiller 35. Compared with the case, the coefficient of performance (COP) of the heat pump chiller 35 can be improved. In addition, when the heat pump chiller 35 is operated at night, it contributes to leveling of electric power use, and the heat pump chiller 35 can be operated by using relatively inexpensive night electric power, so that it is economically advantageous. It is the same as the case where it is used as a system for generating hot water w2.

  In the above description of the first embodiment, it has been described that the temperature raising device is the heat pump chiller 35. However, when the roof watering system 10 is not used as a system for generating the cold / hot water w3, there is simply no function of the chiller. It is good also as a heat pump. In this case, the cold heat storage tank 23, the cold water pump 33 around it, and the pipes 43s and 43d can also be omitted. Also, the inlet switching valve 28 and the outlet switching valve 29 can be omitted, the hot water inlet pipe 42s and the common inlet pipe 45s can be directly connected, and the hot water outlet pipe 42d and the common outlet pipe 45d can be directly connected. . Moreover, it replaces with the roof temperature sensor 16 and the rainwater tank temperature sensor 17, and the solar radiation sensor which detects solar radiation is provided, and rain water w1 may be supplied to the roof surface 18 when there is solar radiation. Furthermore, when not using the middle water w4, the middle water tank 24 and the devices 34 and 39 around it can be omitted. Furthermore, when operating each apparatus manually, the control apparatus 15 does not need to be provided.

  In the above description of the first embodiment, it has been described that the heat collecting pump 31 is a submersible pump. However, a self-priming centrifugal pump provided at a higher position than the water source in the rainwater tank 21 may be used. Moreover, when the rainwater tank 21 is a portable water tank and the heat collection pump 31 is installed in a lower place than the water source, a non-self-priming spiral pump may be used.

  In the above description of the first embodiment, the heat pump chiller 35 is described as being a compression type, but may be an absorption type. In the case of the compression type, there is an advantage that the response is quick (the time from the start-up until the water temperature is adjusted is short) and it can be operated by night electricity. On the other hand, in the case of the absorption type, it is possible to use energy that is generally cheaper than electric energy. The energy supplied from the outside is electricity in the case of the compression type, and is any of oil, gas, steam, etc. in the case of the absorption type.

  In the above description of the first embodiment, it has been described that the inlet switching valve 28 and the outlet switching valve 29 are three-way valves. However, two two-way valves are used to introduce the water temperature adjusting unit 35c of the heat pump chiller 35. You may comprise so that the water to perform may be switched between warm water w2 and cold water w3.

  In the above description of the first embodiment, rainwater w1 is supplied when the roof watering system 10 is used as a system for generating hot water w2 and when it is used as a system for generating cold water w3. Although there is no mention of changing the roof surface 18, in Japan located in the northern hemisphere, when using as a system for generating hot water w2, rainwater w1 is supplied to the roof surface 18 facing the south side, and cold water w3 is used. Rainwater w1 may be supplied to the roof surface 18 facing the north side. In addition, a rainwater tank 21 is provided separately for generating hot water w2 and for generating cold water w3, and a system for generating hot water w2 and a system for generating cold water w3 as needed depending on the temperature change of the roof surface 18. (For example, switching between day and night instead of switching every season).

  Next, with reference to FIG. 5, the non-sprinkling snow melting system 50 as a solar heat collection system which concerns on the 2nd Embodiment of this invention is demonstrated. FIG. 5 is a schematic system diagram of the non-sprinkling snow melting system 50. A non-sprinkling snow melting system 50 includes a heat collecting forward pipe 52 as a heat collecting water supply pipe, a rainwater tank 21 as a first water tank, a thermal heat storage tank 22 as a second water tank, and a heat pump as a temperature raising device. 55.

  The heat collection outlet pipe 52 is connected to a snow melting pipe 53 as a snow melting pipe installed under the road surface 58 via a switching valve 56A. The other end of the snow melting tube 53 is connected to the heat collection return tube 54 via a switching valve 56B. The snow melting tube 53 is a pipe for warm water load heating buried under the road surface 58, and is attached so that a cross-linked polyethylene tube meanders on a panel of a predetermined size. The end of the heat collection outlet pipe 52 and the end of the heat collection return pipe 54 on the side opposite to the ends connected to the switching valves 56 </ b> A and 56 </ b> B are present in the rainwater tank 21.

  The rainwater tank 21 is typically a water tank that stores rain that has fallen on the road surface 58. The rain that has fallen on the road surface 58 flows into a rainwater tank 21 through a rainwater pipe (not shown). The rainwater tank 21 is preferably insulated from the viewpoint that the rainwater w1 obtained by collecting solar heat can be used at an arbitrary time. The rain water tank 21 is a water tank surrounded by a frame (concrete) formed under the road surface 58 in this embodiment, but is a portable water tank made of FRP or steel plate installed on the ground or indoors. May be. In the rainwater tank 21, a heat collecting pump 31 similar to that of the roof watering system 10 (see FIG. 1) is installed, and a heat collecting pipe 52 is connected to the heat collecting pump 31. The rainwater tank 21 is provided with a rainwater heat exchanger 38 similar to that of the roof watering system 10 (see FIG. 1). A heat source water pipe 41 provided with a heat source water pump 41P is connected to the rainwater heat exchanger 38. The heat source water pipe 41 is connected to the heat pump 55.

  The heat pump 55 introduces, as a heat source, the heat source water wm that has been heated and exchanged with the rainwater w1 in the rainwater tank 21, and uses the external electric energy to have a temperature higher than that of the rainwater w1. It is an apparatus which produces | generates the warm water w2 as water. The heat pump 55 is a unit that uses the refrigerant refrigeration cycle to heat water (w2) with heat released when the refrigerant condenses. The heat pump 55 is typically a compression heat pump, and includes an evaporator 55e that introduces heat source water wm and a condenser 55c that introduces hot water w2. The heat source water pipe 41 is connected to the evaporator 55e. The condenser 55c has a hot water inlet pipe 42s connected to the inlet side and a hot water outlet pipe 42d connected to the outlet side.

  The hot water w <b> 2 heated by the heat pump 55 is stored in the hot heat storage tank 22. It is preferable that the thermal heat storage tank 22 is appropriately insulated from the viewpoint that the hot water w <b> 2 whose temperature has been raised by the heat pump 55 can be used at an arbitrary time. In this embodiment, the thermal heat storage tank 22 is a water tank surrounded by a frame (concrete) formed by using an underground pit, like the rainwater tank 21, but is made of FRP installed on the ground or indoors. Or a portable water tank made of steel plate or the like. A hot water pump 32 is installed in the hot heat storage tank 22. A hot water inlet pipe 42 s is connected to the hot water pump 32. In addition, a snow melting pump 59 that pumps the hot water w2 to the snow melting tube 53 in the winter is installed in the thermal heat storage tank 22. A snow melting forward pipe 57A is connected to the snow melting pump 59. The other end of the snow melting forward tube 57A is connected to the switching valve 56A. A snow melting return pipe 57B is connected to the other switching valve 56B, and the other end of the snow melting return pipe 57B is led to the thermal heat storage tank 22. The switching valve 56A is a three-way valve to which the snow melting pipe 53, the heat collecting forward pipe 52, and the snow melting forward pipe 57A are connected. The switching valve 56B is a three-way valve to which the snow melting pipe 53, the heat collecting return pipe 54, and the snow melting return pipe 57B are connected.

  With continued reference to FIG. 5, the operation of the non-watering snow melting system 50 will be described. During winter snowfall, hot water w2 as hot water for melting snow on the road surface 58 is generated by the heat pump 55 and stored in the thermal heat storage tank 22. Then, the switching valve 56B is switched so that the snow melting tube 53 and the snow melting return pipe 57B communicate with each other so that the switching valve 56A communicates with the snow melting tube 53 and the snow melting outward tube 57A. At the time of snowfall, the snow melting pump 59 is activated, and the hot water w2 is supplied to the snow melting tube 53 via the snow melting forward tube 57A. When the hot water w2 flows through the snow melting tube 53, the road surface 58 is warmed and the snow on the road surface 58 is melted. The hot water w <b> 2 whose temperature has decreased due to melting snow flows through the snow melting return pipe 57 </ b> B and returns to the thermal heat storage tank 22. In addition, although a general snow melting system is not used except during snowfall, the non-sprinkling snow melting system 50 can be used effectively other than during snowfall.

  Except during snowfall, the heat collecting pump 31 is activated when the temperature of the road surface 58 is higher than the temperature of the rainwater w1 in the rainwater tank 21 by a third predetermined temperature or more. Here, the “third predetermined temperature” is preferably a temperature at which solar heat is merited even when the power of the heat collecting pump 31 is subtracted, and can be set to 10 ° C., for example. From another point of view, the temperature of the rainwater w1 flowing through the snow melting tube 53 and returning to the rainwater tank 21 is 2 ° C. or more, preferably 5 ° C. or more than the temperature of the rainwater w1 in the rainwater tank 21 before heat collection. More preferably, the temperature of the road surface 58 that becomes higher by 8 ° C. or more is set as the third predetermined temperature. When the heat collecting pump 31 is started, the switching valve 56A is switched so that the snow melting tube 53 and the heat collecting forward tube 52 communicate with each other, and the switching valve 56B is communicated with the snow melting tube 53 and the heat collecting return tube 54. Switch.

  When the heat collecting pump 31 is activated, the rainwater w1 flows through the snow melting pipe 53 after flowing through the heat collecting outgoing pipe 52. The rainwater w1 flowing through the snow melting tube 53 receives heat from the surface of the road surface 58 where the temperature has increased due to solar radiation, and the temperature rises. Conversely, the road surface 58 is cooled by heat exchange with the rainwater w1. When the road surface 58 is cooled, the heat island phenomenon is suppressed. The rainwater w <b> 1 whose temperature has risen returns to the rainwater tank 21 through the heat recovery return pipe 54.

  The heat of the rainwater w <b> 1 in the rainwater tank 21 whose temperature has risen is used as heat source water for the heat pump 55. When the heat pump 55, the heat source water pump 41P, and the hot water pump 32 are activated, the heat of the rain water w1 in the rain water tank 21 is transmitted to the heat source water wm through the rain water heat exchanger 38, and the heat source water 41P is used as the heat source water. wm is introduced into the evaporator 55e of the heat pump 55. On the other hand, when the hot water pump 32 is activated, the hot water w2 in the hot heat storage tank 22 is introduced into the condenser 55c via the hot water inlet pipe 42s. The hot water w <b> 2 introduced into the condenser 55 c rises in temperature and returns to the hot heat storage tank 22. In this way, the temperature of the hot water w2 in the hot heat storage tank 22 is adjusted to a temperature suitable for use. The hot water w2 in the thermal heat storage tank 22 adjusted to a temperature suitable for use is raised to about 50 ° C., for example, in the same manner as the roof watering system 10 (see FIG. 1). It can be used during the time period.

  Thus, in the non-sprinkling snow melting system 50, the coefficient of performance of the heat pump 55 is compared with the case where the temperature of the heat source water wm is not increased by supplying the heat source water wm whose temperature has been increased by the collected solar heat to the heat pump 55. (COP) can be improved. In addition, when the heat pump 55 is operated at night, it contributes to leveling of electric power use, and there is also an economic advantage because the heat pump 55 can be operated using relatively inexpensive night electric power. . In addition, the non-sprinkling snow melting system 50 can effectively use a system whose use period is normally limited to a season with snowfall, even in summer. That is, when the road surface 58 as the solar radiation receiving surface is at a temperature that can raise the temperature of the rainwater w1, it can be used for purposes other than melting snow.

  A series of operation | movement of the non-sprinkling snow melting system 50 demonstrated above may be performed manually, and may be performed automatically by a control apparatus.

  Next, with reference to FIG. 6, the water spraying snow extinguishing system 60 as a solar heat collection system which concerns on the 3rd Embodiment of this invention is demonstrated. FIG. 6 is a schematic system diagram of the watering and snow removal system 60. The water sprinkling / snow-removing system 60 is a system that sprinkles snow directly on the road surface 68 from the road surface sprinkling pipe 61 to clear the snow. Compared with the non-sprinkling snow melting system 50 (see FIG. 5), the water spraying and snow-melting system 60 is replaced with the heat collecting forward pipe 52 and the heat collecting return pipe 54 connected to the snow melting pipe 53 (see FIG. 5). The difference is that the heat collection outgoing pipe 52 is connected to the supply pipe 62 and the heat collection return pipe 54 is connected to the recovery pipe 64. Further, a drain pipe 67 is disposed toward a sewage main pipe (not shown) instead of the snow melting return pipe 57B (see FIG. 5) disposed from the switching valve 56B to the thermal heat storage tank 22. ing. The structure of the water tank side from the switching valves 56A and 56B other than this is the same as that of the non-sprinkling snow melting system 50 (refer FIG. 5).

  The supply pipe 62 is connected to the road surface water spray pipe 61. The road surface sprinkling pipes 61 are typically arranged at appropriate intervals on the center line of the road surface 68, and are configured to be able to spray water radially except on the center line. On both sides of the road surface 68, water collecting grooves 63 are formed as road surface water collecting pipes for collecting water sprayed from the road surface water pipe 61 and rainwater. A collection pipe 64 is connected to the water collecting groove 63.

  With continued reference to FIG. 6, the operation of the watering and snow removal system 60 will be described. Rain that hits the road surface 68 due to rain flows into the water collecting groove 63. Rainwater that has flowed into the water collecting groove 63 flows through the collection pipe 64 and flows into the rainwater tank 21 and is stored. At the time of snowfall in winter, as in the non-sprinkling snow melting system 50 (see FIG. 5), hot water w2 as hot water for removing snow on the road surface 68 is generated by the heat pump 55 and stored in the thermal heat storage tank 21. Keep it. Then, the switching valve 56B is switched so that the recovery pipe 64 and the drain pipe 67 communicate with each other so that the switching pipe 56A communicates with the supply pipe 62 and the snow melting forward pipe 57A. At the time of snowfall, the snow melting pump 59 is activated, and hot water w2 is pumped to the road surface sprinkling pipe 61 through the snow melting forward pipe 57A and the supply pipe 62 and sprinkled on the road surface 68. The snow on the road surface 68 is melted by the hot water w <b> 2 and flows into the water collecting groove 63. The snowmelt flowing into the water collecting groove 63 flows through the recovery pipe 64 and the drain pipe 67 and reaches the sewage main pipe (not shown). The amount of water that flows out of the system so as to be led to the sewage main pipe (not shown) is supplied from the city water (not shown) to the thermal heat storage tank 22. In addition, although it is not used except during snowfall in a general snow removal system, the sprinkling snow removal system 60 can be used effectively other than during snowfall.

  Except during snowfall, the heat collecting pump 31 is turned on when the temperature of the road surface 68 is higher than the temperature of the rainwater w1 in the rainwater tank 21 by a third predetermined temperature or more, similarly to the non-sprinkling snow melting system 50 (see FIG. 5). Start. The “third predetermined temperature” is preferably a temperature at which it is more advantageous to extract solar heat even when the power of the heat collecting pump 31 is subtracted, and can be set to 10 ° C., for example. From another point of view, the temperature of the rainwater w1 flowing through the road surface 68 and returning to the rainwater tank 21 is 2 ° C or higher, preferably 5 ° C or higher, than the temperature of the rainwater w1 in the rainwater tank 21 before heat collection. More preferably, the temperature of the road surface 68 that is higher by 8 ° C. or more is set as the third predetermined temperature. When starting the heat collecting pump 31, the switching valve 56A is switched so that the supply pipe 62 and the heat collecting forward pipe 52 communicate with each other, and the switching valve 56B is communicated with the recovery pipe 64 and the heat collecting return pipe 54. Switch.

  When the heat collecting pump 31 is activated, the rainwater w1 flows through the heat collecting forward pipe 52 and the supply pipe 62 to reach the road surface sprinkling pipe 61 and is sprinkled on the road surface 68. The rainwater w1 sprinkled on the road surface 68 flows toward the water collecting groove 63, and the temperature rises by receiving heat from the surface of the road surface 68 whose temperature has been increased by solar radiation. Conversely, the road surface 68 is cooled by the rainwater w1. When the road surface 68 is cooled, the heat island phenomenon is suppressed. The rainwater w <b> 1 whose temperature has risen returns to the rainwater tank 21 through the recovery pipe 64 and the heat recovery return pipe 54.

  The heat of the rainwater w <b> 1 in the rainwater tank 21 whose temperature has risen is used as heat source water for the heat pump 55. When the heat pump 55, the heat source water pump 41P, and the hot water pump 32 are activated, the heat of the rain water w1 in the rain water tank 21 is transmitted to the heat source water wm through the rain water heat exchanger 38, and the heat source water 41P is used as the heat source water. wm is introduced into the evaporator 55e of the heat pump 55. On the other hand, when the hot water pump 32 is activated, the hot water w2 in the hot heat storage tank 22 is introduced into the condenser 55c via the hot water inlet pipe 42s. The hot water w <b> 2 introduced into the condenser 55 c rises in temperature and returns to the hot heat storage tank 22. In this way, the temperature of the hot water w2 in the hot heat storage tank 22 is adjusted to a temperature suitable for use. The hot water w2 in the thermal heat storage tank 22 adjusted to a temperature suitable for use rises to about 50 ° C., for example, similarly to the roof watering system 10 (see FIG. 1) and the non-watering snow melting system 50 (see FIG. 5). It can be used at any time to warm the water in the heated pool.

  As described above, in the water spray snow removal system 60, the coefficient of performance of the heat pump 55 is compared with the case where the temperature of the heat source water wm is not increased by supplying the heat source water wm whose temperature has been increased by the collected solar heat to the heat pump 55. (COP) can be improved. In addition, when the heat pump 55 is operated at night, it contributes to leveling of electric power use, and there is also an economic advantage because the heat pump 55 can be operated using relatively inexpensive night electric power. . In addition, the water spray snow removal system 60 can effectively use a system whose use period is normally limited to a season with snowfall even in summer. That is, when the road surface 68 as the solar radiation receiving surface is at a temperature that can raise the temperature of the rainwater w1, it can be used for purposes other than snow melting (snow removal).

  The series of operations of the water spray snow removal system 60 described above may be performed manually as in the non-water sprinkling snow melting system 50 (see FIG. 5), or may be performed automatically by the control device.

  In the above description of the second and third embodiments, the switching valves 56A and 56B are three-way valves, but two two-way valves may be substituted.

  In the above description of the first to third embodiments, the first water tank has been described as being the rainwater tank 21, but it may be a water tank that stores tap water. That is, the first water may be tap water instead of rain water w1. Moreover, the water which rain water and tap water mixed may be sufficient.

  In the above description of the first to third embodiments, the rainwater heat exchanger 38 is provided in the rainwater tank 21, but the rainwater w1 is directly supplied to the heat pump chiller 35 (heat pump 55) as a heat source. Also good. In this case, it is preferable to perform an appropriate anticorrosion treatment. When the rainwater w1 is directly supplied to the heat pump chiller 35 (heat pump 55) as a heat source, the heat exchange loss is eliminated and the COP can be improved.

1 is a schematic system diagram of a roof watering system according to a first embodiment of the present invention. It is a fragmentary sectional view around the roof. It is a perspective view which shows each zone when a roof is divided | segmented virtually. It is a fragmentary perspective view which shows the water supply zone switching structure around a roof watering pipe. (A) is a figure which shows one aspect, (b) is a figure which shows another aspect. It is a typical systematic diagram of the non-watering snow melting system which concerns on the 2nd Embodiment of this invention. It is a typical systematic diagram of the watering snow extinguishing system which concerns on the 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Roof watering system 11 Roof watering pipe 11s Low edge 11t High edge 13a, 13b, ... Switching valve 14a, 14b, ... Movable plate 15 Control apparatus 16 Roof temperature sensor 18 Roof surface 18A-18F Zone 19 Roof water collecting pipe DESCRIPTION OF SYMBOLS 21 Rainwater tank 22 Thermal storage tank 23 Cold thermal storage tank 35 Heat pump chiller 36 Pool heating heat exchanger 50 Non-sprinkling snow-melting system 52 Heat extraction pipe 53 Snow-melting pipe 55 Heat pump 58 Road surface 60 Water spraying snow-discharging system 61 Road surface water-sprinking pipe 63 Water collecting groove 68 Road surface w1 Rain water w2 Hot water w3 Cold water w5 Heated water

Claims (9)

A roof sprinkler for supplying first water to a surface of a roof that receives sunlight, wherein the first water can be supplied by dividing the surface of the roof virtually into a plurality of zones. A constructed roof sprinkler;
A roof water collecting pipe for collecting first water flowing along the surface of the roof;
Supply zone change that supplies the first water to a part of the plurality of zones in which the surface of the roof is virtually divided and switches the zone to which the first water is supplied at a time difference Means;
Solar heat collection system.   The roof sprinkler pipe has a partition plate that divides the roof sprinkler pipe into the same number of sections as the number of sections of the roof virtually divided into a plurality of zones;
  A plurality of pumping pipes for guiding the first water to each section of the roof sprinkler pipe partitioned by the partition plate;
  The supply zone changing means is constituted by a switching valve capable of blocking the flow of the first water provided in each of the plurality of pumping pipes;
  The solar heat collection system according to claim 1.   The roof water spray pipe is configured by dividing the roof water collecting pipe side wall into the same number of sections as the number of sections of the roof virtually divided into a plurality of zones, and the side wall is divided into the divided sections. A movable plate that lowers the water level at which the first water flows from the roof sprinkler pipe to the surface of the roof by bending;
  The supply zone changing means comprises the movable plate;
  The solar heat collection system according to claim 1.   A controller that controls the supply zone changing means so that the first water flows to a zone other than an adjacent zone when the zone to which the first water is supplied is switched;
  The solar heat collection system of any one of Claims 1 thru | or 3. The roof sprinkler pipe was constructed with a clear light whose edge on the roof water collecting pipe side is lower than the edge on the opposite side;
The solar heat collection system of any one of Claims 1 thru | or 4 .   A first water tank for storing first water collected in the roof water collecting pipe;
  A temperature raising device that generates second water having a temperature higher than that of the first water using heat of the first water in the first water tank as a heat source;
  The solar heat collection system of any one of Claims 1 thru | or 5.   A second water tank for storing the second water generated by the temperature raising device;
  The solar heat collection system according to claim 6. A heat exchanger for exchanging heat between the heat of the heated water different from the second water and the heat of the second water;
The solar heat collection system of Claim 6 or Claim 7 . The temperature raising device is constituted by a water heat source heat pump chiller that generates third water having a temperature lower than that of the first water by using heat of the first water in the first water tank as a heat source;
And a third water tank for storing the third water;
A temperature detector for detecting the temperature of the surface of the roof;
A controller for operating the water heat source heat pump chiller as a chiller when the temperature of the surface of the roof is lower than the temperature of the first water in the first water tank;
The solar heat collection system according to any one of claims 6 to 8 .

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