CN108800290A - A kind of solar energy massive plate heating system of the auxiliary energy of band - Google Patents

Abstract

A large flat-panel solar heating system with auxiliary energy, including a flat-plate heat collector, a gas wall-hung boiler, a heat exchanger, a heat storage tank, a return flow pool, multiple circulation pumps and control valves; the heat collector is controlled by a second The valve, the second circulation pump and the third circulation pump are connected to the water inlet of the heat exchanger, the second circulation pump and the third circulation pump are connected in parallel and then connected in series with the second control valve, and the water outlet of the heat exchanger is connected to the water outlet of the heat exchanger through the fourth valve. One end of the heat storage tank is connected to the other end of the heat storage tank through the third valve and the fifth valve, and the water outlet of the heat exchanger is connected through the third valve, the sixth valve and the fourth circulation pump in parallel, The circulation pump is connected to the heat user, and the gas wall-hung boiler is connected to the heat user through the seventh valve and the eighth valve in parallel, the fourth circulation pump and the fifth circulation pump in parallel. The invention has simple structure and convenient operation, adopts multi-mode combined control, fully utilizes clean energy on the premise of ensuring the quality of heat supply, and can adapt to various heating environments under complex working conditions.

Description

A large solar panel heating system with auxiliary energy

technical field

The invention relates to a solar heating system, in particular to a solar large flat panel heating system with auxiliary energy.

Background technique

As a recognized clean energy, solar energy has gradually become the focus of human development and utilization due to its clean, sustainable and inexhaustible sources. Strengthening the research on solar energy utilization technology has far-reaching significance for some areas of our country. At present, solar energy utilization technologies mainly include photothermal conversion utilization, solar power generation, and photochemical utilization. Photothermal conversion technology is one of the main utilization methods of solar energy, which gathers solar radiation energy and stores it for utilization through focusing, reflection and absorption.

Solar thermal conversion has many advantages, and the efficiency of solar thermal utilization is high. However, due to unstable factors such as the dispersion, intermittent and randomness of solar energy, when encountering seasonal changes or long periods of rainy weather, solar thermal utilization The operation of the system is also unstable, which limits the further development of solar thermal utilization. However, if the solar energy is integrated and coupled with the existing conventional heating technology, and the solar multi-source distributed heating system with auxiliary energy is studied, the multi-energy complementary The way together constitutes the heating heat source, which is the best choice in terms of economic and environmental benefits.

The existing solar heating systems with auxiliary energy mainly include the following two types:

One is that the solar heat collector adopts the CPC reflector U-shaped vacuum tube heat collector, through the combined heating of solar energy and gas, the use of solar radiation energy to preheat the cold water, and combined heating at the same time, to ensure the quality of heat supply, reduce energy consumption and harmful gas emissions. Although this type of design saves operating costs and protects the environment, there are certain disadvantages in the use of vacuum tube solar collectors. Vacuum tube collectors are fragile and easy to break, and the maintenance cost is high. It is not easy to transport and install, which is not conducive to urban high-rise buildings. Use; at the same time, there is no overheat protection function, poor frost resistance, and cannot be used normally below -20°C; the gap between the glass tubes is large, the effective heat collection area per unit is small, and the heat gain is low, which requires a larger building space.

The other is a solar energy and gas boiler composite heating device, which mainly uses solar energy for heating. When solar energy cannot meet the requirements, an additional gas boiler is used for heating. It meets the requirements of energy saving and consumption reduction while meeting the performance requirements. . This type of design is not very reasonable and cannot meet the more complicated operating conditions in winter.

Contents of the invention

Aiming at the deficiencies of the above-mentioned prior art, the present invention provides a large-panel solar heating system with auxiliary energy that can meet complex operating conditions.

In order to achieve the above purpose, the technical solution adopted by the present invention is: a solar large flat panel heating system with auxiliary energy, including a flat panel heat collector, a gas wall-hung boiler, a heat exchanger, a heat storage tank, a reflux pool, a first Circulation pump, second circulation pump, third circulation pump, fourth circulation pump, fifth circulation pump, sixth circulation pump, first control valve, second control valve, third control valve, fourth control valve, fifth The control valve, the sixth control valve, the seventh control valve, the eighth control valve and the ninth control valve; On the port, the second circulating pump and the third circulating pump are connected in series with the second control valve, the flat plate collector is also connected to the return pool through the first circulating pump and the first control valve, and the water outlet of the heat exchanger is connected through the fourth valve It is connected to one end of the heat storage tank, and connected to the other end of the heat storage tank through the third valve and the fifth valve. The heat storage tank is connected to the water supply pipe of tap water through the sixth circulation pump and the ninth control valve to exchange heat. The water outlet of the boiler is connected to the heat user through the third valve, the sixth valve, the fourth circulation pump in parallel, and the fifth circulation pump. The fifth circulation pump is connected with the heat user, the fifth valve is arranged between the third valve and the seventh valve, and the seventh valve is arranged between the fifth valve and the sixth valve. The sixth valve is located between the seventh valve and the eighth valve.

Preferably, the heat exchanger is a plate heat exchanger.

Preferably, the flat panel heat collector is a solar large flat panel heat collector.

The invention has simple structure and easy operation, adopts multi-mode combined control, fully utilizes clean energy on the premise of ensuring the quality of heat supply, optimizes its control and operation method, improves the economy of the heating device, and can adapt to various complex working conditions Heating environment.

Description of drawings

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

In the figure: 1-flat plate heat collector; 2-reflux pool; 3-plate heat exchanger; 4-heat storage tank; 5-gas wall-hung boiler; 6-first circulation pump; 7-second circulation pump; 8 -the third circulation pump; 9-the fourth circulation pump; 10-the fifth circulation pump; 11-the sixth circulation pump; 12-the first valve; 13-the second valve; 14-the third valve; 15-the fourth valve ; 16-fifth valve; 17-sixth valve; 18-seventh valve; 19-eighth valve; 20-ninth valve; 21-heat user.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in Figure 1, a solar large flat panel heating system with auxiliary energy includes a flat panel collector 1, a gas wall-hung boiler 5, a plate heat exchanger 3, a heat storage tank 4, a return pool 2, and a first cycle Pump 6, second circulation pump 7, third circulation pump 8, fourth circulation pump 9, fifth circulation pump 10, sixth circulation pump 11, first control valve 12, second control valve 13, third control valve 14 , the fourth control valve 15 , the fifth control valve 16 , the sixth control valve 17 , the seventh control valve 18 , the eighth control valve 19 and the ninth control valve 20 . The flat plate heat collector 1 is connected to the water inlet of the plate heat exchanger 3 through the second control valve 13 , the second circulation pump 7 and the third circulation pump 8 . The second circulation pump 7 and the third circulation pump 8 are connected in parallel and connected in series with the second control valve 13 . The flat plate heat collector 1 is also connected with the return pool through the first circulation pump 6 and the first control valve 12 . The water outlet of the plate heat exchanger 3 is connected to one end of the heat storage tank 4 through the fourth valve 15 , and connected to the other end of the heat storage tank 4 through the third valve 14 and the fifth valve 16 . The hot water storage tank 4 is connected to the water supply pipe of tap water through the sixth circulation pump 11 and the ninth control valve 20 . The water outlet of the plate heat exchanger 3 is connected to the heat user 21 through the third valve 14 , the sixth valve 17 and the fourth circulation pump 9 and the fifth circulation pump 10 connected in parallel. The gas wall-hung boiler 5 is connected to the heat user 21 through the seventh valve 18 and the eighth valve 19 connected in parallel, the fourth circulating pump 9 and the fifth circulating pump 10 connected in parallel. The fifth valve 16 is disposed between the third valve 14 and the seventh valve 18 . The seventh valve 18 is provided between the fifth valve 16 and the sixth valve 17 . The sixth valve 17 is located between the seventh valve 18 and the eighth valve 19 .

The heating device of the present invention can be controlled by a fully automatic heating mode and a manual heating mode, wherein the manual mode includes four operating modes:

1) Full solar heating mode. The temperature difference control method is adopted. When the solar energy is sufficient, the first circulation pump, the third circulation pump, the fourth circulation pump, the first control valve, the second control valve, the third control valve and the sixth control valve are turned on, and the collector collects The heat can be used as a heat source for direct heating; when the indoor temperature measurement point is higher than the upper limit, the collected heat is too high. At this time, on the basis of the above, continue to open the sixth circulation pump, the fourth control valve, the fifth control valve and The ninth control valve stores excess heat in the heat storage tank. The valve openings of the third control valve, the fourth control valve and the fifth control valve can be adjusted arbitrarily according to the heat collection conditions, so that the heat supply can meet the needs of users. At this time, the gas wall-hung boiler does not work and there is no energy consumption;

2) Dual energy coupled heating mode. When the solar energy decreases, the indoor temperature measurement point is lower than the set value, and the heat collected by the collector is not enough to meet the needs of residents, the third control valve is closed to extract heat from the heat storage tank to provide heat for residents. If it still cannot meet the demand, open the seventh control valve and the eighth control valve, and start the gas wall-hung boiler at this time, but only play the role of supplementary heat, and increase the temperature of the hot water supply to the set value;

3) Full wall-hung boiler heating mode. When the indoor temperature measurement point is lower than the minimum limit, only the third control valve, the sixth control valve, the seventh control valve, the eighth control valve and the fourth circulation pump are turned on, and other valves and circulation pumps are closed to stop the solar collector. The thermal system and the hot water storage tank are running, and the heat of the system is all provided by the gas wall-hung boiler.

4) Solar collector antifreeze mode. When heating is not needed at night or in low-temperature weather, in order to prevent the flat plate collector from freezing and cracking, the first circulation pump, the third circulation pump, the first control valve and the second control valve are turned on, and other valves and circulation pumps are closed. The heat transfer medium in the solar heat collection system is circulated to achieve the purpose of protecting the heat collection system.

The invention utilizes solar energy and gas to continuously provide domestic hot water and heating for residents. The core heat source for its work is solar energy, and gas is used as an auxiliary heat source. In the circulation pipeline of the system, two circulation pumps are installed in parallel, one of which is standby, and can be replaced in time when a failure occurs, so as not to affect the normal operation of the equipment.

Claims (3)

1. A solar large flat plate heating system with auxiliary energy, characterized in that it includes a flat plate heat collector, a gas wall-hung boiler, a heat exchanger, a heat storage tank, a reflux pool, a first circulation pump, and a second circulation pump , the third circulation pump, the fourth circulation pump, the fifth circulation pump, the sixth circulation pump, the first control valve, the second control valve, the third control valve, the fourth control valve, the fifth control valve, the sixth control valve , the seventh control valve, the eighth control valve and the ninth control valve; the flat plate collector is connected to the water inlet of the heat exchanger through the second control valve, the second circulation pump and the third circulation pump, the second circulation pump and the After the third circulation pump is connected in parallel, it is connected in series with the second control valve. The flat plate collector is also connected to the return pool through the first circulation pump and the first control valve. The water outlet of the heat exchanger is connected to one end of the heat storage tank through the fourth valve. connected to the other end of the heat storage tank through the third valve and the fifth valve, the heat storage tank is connected to the water supply pipe of tap water through the sixth circulation pump and the ninth control valve, and the water outlet of the heat exchanger passes through the third The valve, the sixth valve and the fourth and fifth circulation pumps in parallel are connected to heat users, and the gas wall-hung boiler is connected to the heat users through the seventh and eighth valves in parallel, the fourth and fifth circulation pumps in parallel connection, the fifth valve is located between the third valve and the seventh valve, the seventh valve is located between the fifth valve and the sixth valve, and the sixth valve is located between the seventh valve and the eighth valve. 2. A solar large flat plate heating system with auxiliary energy as claimed in claim 1, characterized in that: said heat exchanger is a plate heat exchanger. 3. A solar large flat panel heating system with auxiliary energy as claimed in claim 1, characterized in that: said flat panel heat collector is a solar large flat panel heat collector.