CN101984296A - Solar floor heating and hot water supply system - Google Patents

Abstract

The invention relates to a solar floor heating and hot water supply system, belonging to the field of photo-thermal application of solar energy. The system provided by the invention is composed of a solar collector array, a domestic hot water tank, a heat accumulation working medium tank, a floor heating coiled tube, a solar circulating pump and a floor heating circulating pump. The invention is characterized in that the solar domestic hot water tank and the heat accumulation working medium tank are relatively independent water tanks the working media of which are separated but maintain thermal connection. The system ensures domestic hot water supply on a priority basis and the quality of the domestic hot water is not polluted by the floor heating cycle working medium; and in addition, uniform working medium is applied to the solar circulation and floor heating circulation, so that scale formation of a solar thermal collector is avoided and the service life of the solar thermal collector is lengthened.

Description

A solar floor heating and hot water supply system

technical field

The invention relates to a solar energy utilization device, which belongs to the field of light and heat utilization of solar energy.

Background technique

With the development of social economy, energy and environmental issues are becoming more and more prominent. It has become a social consensus to develop and utilize a large number of renewable energy sources to achieve a low-carbon economy. So far, solar thermal utilization is still the most cost-effective utilization method in the utilization of new energy. At present, solar thermal utilization is mainly used in the heating of domestic hot water in buildings to meet people's domestic hot water needs. In recent years, some solar thermal utilization systems that take into account hot water supply and building heating have also been developed. A single water tank is used, that is, the heating cycle and domestic hot water share a water tank. Domestic hot water and heating hot water are mixed. In terms of heat consumption and water quality Causes the impact of heating on domestic hot water; there are also heating and solar energy recycling working fluid, but there is no way to use the heat in the heat storage working medium box or the heat storage working medium box can be used by domestic hot water, and the system is poor in practicability.

Floor heating is to store heat in the floor and transfer the heat to the indoor space through floor radiation and air convection. The combination of floor heating and solar thermal system can greatly reduce the capacity of solar water storage tanks, so floor heating is a good terminal form of solar heating.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art, and to invent an ideal solar floor heating and hot water supply system that takes into account both hot water supply and building floor heating, and gives priority to domestic hot water supply.

The present invention is realized in this way: the solar floor heating and hot water supply system consists of a solar collector array (1), a domestic hot water tank (5), a heat storage working medium box (13), a floor heating coil (7), a solar Circulation pipe (17), solar circulation pump (18), solar circulation connecting pipe (9), heat exchanger (6), floor heating circulation pipe (8) and floor heating circulation pump (9), solar circulation pipe (17) and The solar circulation pump (18) is connected in series, one end of the solar circulation pipe (17) is connected to the lower part of the heat storage working medium box (13), and the other end of the solar circulation pipe (17) is connected to the inlet (1.1) of the heat collector array (1). Connection, one end of the solar circulation pipe (2) is connected to the outlet (1.2) of the collector array (1), and the other end of the solar circulation pipe (2) is connected to the inlet of the heat exchanger (6) in the domestic hot water tank (5) (6.1), one end of the solar circulation communication pipe (9) is connected to the outlet (6.2) of the heat exchanger (6) in the domestic hot water tank (5), and the other end of the solar circulation communication pipe (9) is connected to the heat storage working medium tank The top of (13); the floor heating circulation pipe (8) is connected in series with the floor heating circulation pump (9), and one end of the floor heating circulation pipe (8) is connected to the top of the self-storage heat working medium box (13), and the floor heating circulation pipe (8) is connected in another One end is connected with the floor heating coil (7), and the floor heating return pipe (10) is connected from the floor heating coil (7) to the lower part of the heat storage working medium box (13); At the inlet (15.1) of the heater (15), one end of the domestic hot water communication pipe (12) is connected to the outlet (15.2) of the preheater (13), and the other end of the domestic hot water communication pipe (12) is connected to the domestic hot water tank ( 5), the hot water pipe (3) is connected with the top of the domestic hot water tank (5).

The domestic hot water tank (5) is a pressurized water tank, and the thermal storage medium tank (13) is a non-pressurized water tank.

The solar cycle of the present invention adopts the forced circulation method, and the circulating power is provided by the solar circulating pump. The circulating working medium comes out from the lower part of the thermal storage working medium box, enters the solar heat collector array to be heated by the solar circulation pipe, and comes out from the solar heat collector array through The solar circulation pipe enters the heat exchanger in the domestic hot water tank, heats the hot water in the domestic hot water tank through the heat exchanger, and then enters the upper part of the heating water tank through the solar circulation connecting pipe. The floor heating cycle provides circulation power through the floor heating circulation pump. The circulating working fluid comes out from the upper part of the heat storage medium tank, passes the heat to the floor through the floor heating coil, and then returns to the lower part of the heating water tank; the hot water supply is: tap water passes through the heat storage The preheater in the working medium tank is heated, and then enters the lower part of the domestic hot water tank through the domestic hot water connecting pipe, and the hot water comes out from the upper part of the domestic hot water tank.

The function of the heat storage working medium box of the present invention is to store working medium, store heat and stabilize the temperature of the working medium for use in floor heating and domestic hot water. A preheater is arranged in the heat storage working medium tank, and its direct effect is to preheat tap water and increase the temperature of cold water entering the domestic hot water tank. Its fundamental purpose is to give priority to ensuring the supply of domestic hot water in the heating season, and to provide a method for utilizing the heat in the heat storage working medium box in the non-heating season.

Both the solar circulation system and the floor heating circulation system of the present invention are normal pressure systems, and the heat storage medium tank is a non-pressurized water tank, which can improve the reliability of the system and reduce the cost of the system; the supply of domestic hot water is a pressure system, and the life The hot water tank is a pressurized water tank, so that the pressure of tap water can be used to ensure the pressure of hot water supply, and the pressure of cold and hot water is basically equal, which is beneficial to the simplification of the system and improves the convenience and comfort of water use.

The feature/advantage of the present invention is that the solar domestic hot water tank and the heat storage working fluid tank are relatively independent water tanks, and the respective working fluids are separated, but they are thermally connected to each other, and the system gives priority to ensuring the supply of domestic hot water. The water quality of domestic hot water is not polluted by the working medium of the floor heating cycle. In addition, the solar cycle and the floor heating cycle use the same working medium, which can avoid scaling and corrosion of the solar collector and prolong its service life.

Description of drawings

The present invention will be described in further detail below in conjunction with the embodiments shown in the accompanying drawings.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

In the figure: solar collector array 1, collector array inlet 1.1, collector array outlet 1.2, solar circulation pipe 2, hot water pipe 3, expansion tank 4, domestic hot water tank 5, heat exchanger 6, exchange Heater inlet 6.1, heat exchanger outlet 6.2, floor heating coil 7, floor heating circulation pipe 8, floor heating circulation pump 9, floor heating return pipe 10, solar circulation connecting pipe 11, domestic hot water connecting pipe 12, heat storage medium tank 13 , Exhaust port 14, preheater 15, ball float valve 16, solar circulation pipe 17, solar circulation pump 18, tap water pipe 19.

Detailed ways

The solar floor heating and hot water supply system consists of solar collector array 1, domestic hot water tank 5, heat storage medium tank 13, floor heating coil 7, solar circulation pipe 17, solar circulation pump 18, solar circulation connecting pipe 9, The heat exchanger 6, the floor heating circulation pipe 8 and the floor heating circulation pump 9 are composed.

The solar energy circulates through the solar circulation pump 18, exits from the lower part of the heat storage working medium tank 13, is heated by the solar collector array 1, passes through the heat exchanger 6 in the domestic hot water tank 5, and then enters the heat storage working medium tank 13. The upper part; the floor heating cycle passes through the floor heating circulation pump 9, comes out from the upper part of the thermal storage working medium tank 13, passes through the floor heating coil 7, and returns to the lower part of the thermal storage working medium tank 18; the supply of hot water is: tap water passes through the thermal storage working medium tank The preheater 15 in 13 enters the bottom of domestic hot water tank 5, and hot water goes out from the top of domestic hot water tank 5.

The solar cycle adopts the forced circulation method, using ordinary tap water as the circulating working medium, and the circulating power is provided by the solar circulation pump 18, and the circulating working medium comes out from the lower part of the heat storage working medium tank 13, and enters the flat-plate solar collector through the solar circulation pipe 17 The array 1 is heated, and comes out of the solar collector array through the solar circulation pipe 2 and enters the heat exchanger 6 in the domestic hot water tank 5. Through the heat exchanger 6, the heat of the circulating working fluid is transferred to the hot water in the domestic hot water tank , the temperature of the domestic hot water is increased, and the circulating working medium enters the upper part of the thermal storage working medium tank 13 through the solar circulation connecting pipe 11 . In order to make up for the loss of working medium, a built-in float valve 16 is used and the tap water pipe 19 is connected to ensure the liquid level in the heat storage working medium tank 13 . The solar cycle control adopts known temperature difference cycle control methods and devices.

The floor heating adopts the forced circulation method, and the circulation power is provided by the floor heating circulating pump 9. The circulating working fluid comes out from the upper part of the heat storage medium tank 13, passes the heat to the floor through the floor heating coil 7, and then returns to the heat storage medium tank 13 water tank the lower part. The floor heating cycle control adopts known cycle control methods and devices.

The hot water supply is: tap water is connected to the preheater 15 in the heat storage medium tank 13 through the tap water pipe 19 for preheating, and then enters the lower part of the domestic hot water tank 5 through the domestic hot water connecting pipe 12, and the hot water flows from the domestic hot water The top hot water pipe 3 of case 5 goes out. Connecting the expansion tank 4 to the hot water pipe 3 can slow down the fluctuation range of the hot water pressure caused by the temperature change and the tap water pressure fluctuation.

In this embodiment, tap water is used as the circulating working medium, and the tap water has the advantages of large heat capacity, high thermal conductivity, and low price. However, water as a working medium does not have the antifreeze function, and the antifreeze problem of the system needs to be considered separately. In this embodiment, a known circulation method is used for antifreeze.

The heat storage working fluid tank 13 is a normal pressure water tank, and an exhaust port 14 is provided to ensure its normal pressure operation and ensure its safety.

The structure of the present invention is not limited to the structure shown in the drawings (embodiments). For example, the system can add auxiliary heat sources such as electric heating, heat pump heating or gas heating to form an all-weather heating and heating system; in addition to water for solar heating and heating, other working fluids with antifreeze functions can also be used; float valves can be built-in, or It can be installed externally, or can be replaced by a liquid level sensor-controller; in addition to the flat plate type, the heat collector can also be used in the vacuum tube type and heat pipe type; in addition to the circulation method, the system antifreeze can also use the emptying method. With different implementation methods, the system structure will be changed accordingly, but still belongs to the protection scope of the present invention.

Claims (2)

1. solar energy floor heating and hot-water supply system, it is characterized in that system is by solar thermal collector array (1), domestic hot-water's case (5), heat accumulation working medium case (13), floor heating coil pipe (7), solar energy circulation pipe (17), solar energy circulating pump (18), solar energy circulation communicating pipe (9), heat exchanger (6), floor heating circulation pipe (8) and floor heating circulating pump (9) are formed, solar energy circulation pipe (17) is connected in series with solar energy circulating pump (18), solar energy circulation pipe (17) one ends connect the bottom from heat accumulation working medium case (13), solar energy circulation pipe (17) other end is connected with the inlet (1.1) of collector array (1), solar energy circulation pipe (2) one ends connect the outlet (1.2) from collector array (1), solar energy circulation pipe (2) other end connects the inlet (6.1) of the heat exchanger (6) in domestic hot-water's case (5), solar energy circulation communicating pipes (9) one end connects the outlet (6.2) of the heat exchanger (6) in life boiler (5), and solar energy circulation communicating pipe (9) other end connects the top of heat accumulation working medium case (13); Floor heating circulation pipe (8) is connected in series with floor heating circulating pump (9), floor heating circulation pipe (8) one terminates at the top from heat accumulation working medium case (13), floor heating circulation pipe (8) other end is connected with floor heating coil pipe (7), and floor heating return pipe (10) connects from floor heating coil pipe (7) to heat accumulation working medium case (13) bottom; Preheater (15) inlet (15.1) that running water pipe is connected in the heat accumulation working medium case (13) is located, domestic hot-water's communicating pipes (12) one, termination was from the outlet (15.2) of preheater (13), domestic hot-water's communicating pipe (12) other end bottom of boiler alive (5) of delivering a child, hot-water line (3) is connected with the top of domestic hot-water's case (5).

2. a kind of solar energy floor heating according to claim 1 and hot-water supply system is characterized in that domestic hot-water's case (5) is a bearing type water tank, and heat accumulation working medium case (13) is non-press-bearing water tank.

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