Comprehensive energy-saving temperature-controlled water supply system for living buildings

Abstract

The present invention discloses a comprehensive energy-saving temperature-controlled water supply system for living buildings, comprising a building body and a fresh air system inside the building body, a photovoltaic power generation system, and a solar-air energy combined trigeneration system; exhaust gas discharged through a total heat exchanger is collected into a centralized pipeline through a ventilation duct and a photovoltaic power generation panel, so as to force heat dissipation for photovoltaic components and improve the life and efficiency of the photovoltaic power generation panel; indoor exhaust gas discharged along the photovoltaic power generation panel is collected into a centralized pipeline and sent to the first evaporator side of the air energy system at the roof after cooling the photovoltaic power generation panel, so as to increase the gas temperature at the evaporator inlet, effectively prevent the evaporator from frosting, and improve the efficiency of the air energy system; different condensers and evaporators are used in combination with a water circulation structure, so as to achieve stable temperature control and water supply in winter and summer respectively.

Description

Technical Field

[0001] The invention relates to the technical field of building energy conservation, and in particular to a comprehensive energy-saving temperature-controlled water supply system for living buildings. Background Art

[0002] As global warming intensifies the task of coping with climate change, "net zero energy buildings" are beginning to emerge around the world. In order to accelerate the improvement of building energy-saving standards, cities in key regions such as Beijing-Tianjin-Hebei, the Yangtze River Delta, and the Pearl River Delta have taken the lead in implementing local standards that are higher than national standards, actively carried out demonstrations of ultra-low energy buildings and near-zero energy buildings, refined common key technologies in planning, design, construction, operation and maintenance, led the process of improving energy-saving standards, and promoted the concentrated and contiguous construction of ultra-low energy buildings in parks and blocks with conditions. In recent years, the emergence of a large number of energy-utilizing equipment such as air-source water heaters, air-source heat pumps, and photovoltaic panels has provided a new combination for building energy conservation.

[0003] The relevant patents about low-energy buildings include: a low-energy house (patent number 201320760647.5), the photovoltaic power generation system of this invention needs to add additional heat dissipation equipment to extend the service life of the power generation system, and an ultra-low energy building system (patent number 201810070250.0), the solar power generation system of this invention has no heat dissipation equipment and has a short service life. The present invention uses the temperature difference between the exhaust gas discharged indoors and the photovoltaic power generation panel when it is working to cool the photovoltaic power generation panel, so that the solar photovoltaic panel can maintain high-efficiency operation. In this way, there is no need to add heat dissipation equipment, which avoids additional economic cost losses, and can also extend the service life of the photovoltaic panel and improve the operating efficiency of the system.

[0004] Based on the existing air source heat pump technology, it is necessary to invent a comprehensive energy-saving temperature-controlled water supply system for living buildings that introduces a fresh air system and a photovoltaic power generation system, and can achieve integrated home heating, cooling, domestic hot water and power supply and cascade utilization of energy. Summary of the invention

[0005] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides an integrated energy-saving temperature-controlled water supply system for living buildings that introduces a fresh air system and a photovoltaic power generation system and can realize the integration of household heating, cooling, domestic hot water and power supply and cascade utilization of energy.

[0006] Technical solution: To achieve the above-mentioned purpose, the comprehensive energy-saving temperature-controlled water supply system for living buildings of the present invention includes a building body and a fresh air system inside the building body, a photovoltaic power generation system, and a solar-air energy trigeneration system; the fresh air system includes a centralized pipeline, a total heat exchanger, and a ventilation duct; the photovoltaic power generation system includes a photovoltaic panel; one end of the ventilation duct is connected and extends to the inside of the building body, and the other end extends to the photovoltaic panel; the total heat exchanger drives the air inside the building body to flow through the ventilation duct to the surface of the photovoltaic panel; the centralized pipeline is connected and arranged on the side of the photovoltaic panel away from the ventilation duct;

[0007] The solar energy-air energy combined trigeneration system includes an air source heat pump, a first evaporator, a first condenser, a heating water tank, a circulating water tank and a floor heating coil; the power output end of the photovoltaic panel is electrically connected to the power input end of the air source heat pump and the battery; the first evaporator is correspondingly arranged at the air outlet of the centralized pipeline; the first evaporator is connected to the first condenser; the first condenser is correspondingly arranged in the heating water tank; a circulating pump is connected between the circulating water tank and the heating water tank; the circulating water tank is connected to the floor heating coil; the floor heating coil is correspondingly laid at the indoor bottom position of the building body.

[0008] Furthermore, the solar energy-air energy combined trigeneration system also includes a second evaporator and a second condenser; the second evaporator is correspondingly arranged inside the circulating water tank; and the second condenser is connected to the second evaporator.

[0009] Furthermore, the photovoltaic power generation system also includes a solar collector; the heat dissipation end of the solar collector is correspondingly extended and arranged inside the heating water tank.

[0010] Furthermore, the solar energy-air energy combined trigeneration system also includes a floor heating circulating water pump and a floor heating heat exchanger; the floor heating heat exchanger is cooperatively arranged between the circulating water tank and the floor heating coil; the floor heating circulating water pump is cyclically connected to the floor heating coil.

[0011] Furthermore, the solar-air energy combined trigeneration system also includes a domestic water tank and a mixing valve; a second temperature control valve is arranged between the domestic water tank and the heating water tank; the mixing valve is arranged between the water outlet end of the domestic water tank and the tap water outlet pipe.

[0012] Beneficial effects: The comprehensive energy-saving temperature-controlled water supply system for living buildings of the present invention includes a building body and a fresh air system inside the building body, a photovoltaic power generation system, and a solar-air energy trigeneration system; the exhaust gas discharged through the full heat exchanger passes through the ventilation duct and the photovoltaic power generation panel and is collected in the centralized pipe to force the heat dissipation of the photovoltaic components, thereby improving the life and efficiency of the photovoltaic power generation panel; the indoor exhaust gas discharged along the photovoltaic power generation panel is cooled by the photovoltaic power generation panel and then collected by the centralized pipe to the first evaporator side of the air energy system at the roof, thereby increasing the evaporator inlet gas temperature, effectively preventing the evaporator frosting problem, and improving the efficiency of the air energy system; using different condensers and evaporators in conjunction with the water circulation structure, stable temperature control and water supply can be achieved in winter and summer respectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attached Figure 1 This is the overall architecture diagram of the energy-saving system;

[0014] Attached Figure 2 Schematic diagram of preheating the first evaporator for the fresh air system;

[0015] Attached Figure 3 This is a schematic diagram of the working of each water tank, condenser and evaporator in winter;

[0016] Attached Figure 4 This is a schematic diagram of the operation of each water tank, condenser and evaporator in summer;

[0017] Attached Figure 5 Schematic diagram of the fresh air system cooling down the photovoltaic panels;

[0018] Attached Figure 6 This is a schematic diagram of the photovoltaic panel structure;

[0019] Among them, 1. centralized pipeline 2, full heat exchanger 3, ventilation duct 4, photovoltaic panel 5, battery pack 6, inverter 7, solar collector 8, heat exchange coil 9, circulating water tank 10, first evaporator 11, second evaporator 12, throttle valve 13, compressor 14, circulating pump 15, heating water tank 16, domestic water tank 17, floor heating coil 18, first condenser 19, balcony 20, solar collector circulating water pump 21, mixing valve 22, bracket 23, floor cooling and floor heating heat exchanger 24, second condenser 25, first temperature control valve 26, second temperature control valve 27, collector 28, water distributor 29, residential building. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Comprehensive energy-saving temperature-controlled water supply system for living buildings, such as the attached Figure 1As shown, it includes the building body and the fresh air system inside the building body, photovoltaic power generation system, solar energy-air energy combined trigeneration system; as shown in the figure, the comprehensive energy-saving temperature control water supply system for living buildings, the solar energy-air energy system is installed on the roof, and the solar collector is installed at different angles according to the lighting conditions of various places to maximize the energy utilization rate, combining solar energy with air energy; Figure 2-6 It is a local structural detail and architecture diagram of the energy-saving system; the fresh air system includes a centralized pipeline 1, a total heat exchanger 2 and a ventilation duct 3; the photovoltaic power generation system includes a photovoltaic panel 4; one end of the ventilation duct 3 is connected to extend to the inside of the building body, and the other end extends to the photovoltaic panel 4; the total heat exchanger 2 drives the air inside the building body to flow through the ventilation duct 3 to reach the surface of the photovoltaic panel 4; the centralized pipeline 1 is connected and arranged on the side of the photovoltaic panel 4 away from the ventilation duct 3; the photovoltaic power generation panel 4 is installed on the outer wall and connected by a bracket 22, and there is a space for air flow between the photovoltaic power generation panel 4 and the outer wall, and the photovoltaic power generation panel uses the low-temperature air discharged by the fresh air system to dissipate heat for the photovoltaic power generation panel 4;

[0022] The solar-air energy combined trigeneration system includes an air source heat pump, a first evaporator 10, a first condenser 18, a heating water tank 15, a circulating water tank 9 and a floor heating coil 17; the power output end of the photovoltaic panel 4 is electrically connected to the power input end of the air source heat pump and the battery 5; the first evaporator 10 is correspondingly arranged at the air outlet of the centralized pipeline 1; there is a ventilation duct 3 between the power generation panel and the outer wall, and the gas heated by the photovoltaic panel 4 is sent to the first evaporator 10 to preheat the first evaporator 10, which effectively prevents the first evaporator 10 from frosting in winter and improves the efficiency of the air source heat pump system;

[0023] The first evaporator 10 is connected to the first condenser 18; the first condenser 18 is correspondingly arranged in the heating water tank 15; a circulating pump 14 is connected between the circulating water tank 9 and the heating water tank 15; the circulating water tank 9 is connected to the floor heating coil 17; the floor heating coil 17 is correspondingly laid at the indoor bottom position of the building body to achieve temperature control inside the building body, and combined with the air circulation of the fresh air system, it can ensure uniform temperature distribution in various parts of the room.

[0024] The solar-air energy combined trigeneration system further includes a second evaporator 11 and a second condenser 24 ; the second evaporator 11 is correspondingly arranged inside the circulating water tank 9 ; the second condenser 24 is connected to the second evaporator 11 .

[0025] The photovoltaic power generation system further includes a solar collector 7; the heat dissipation end of the solar collector 7 is correspondingly extended and arranged inside the heating water tank 15; the solar collector 7 provides heat to the heating water tank 15 through the heat exchange coil 8. The photovoltaic power generation panel 4 is installed above the balcony, and the photovoltaic cell is a monocrystalline silicon cell.

[0026] The solar energy-air energy combined trigeneration system also includes a floor heating circulating water pump 19 and a floor heating heat exchanger 23; the floor heating heat exchanger 23 is cooperatively arranged between the circulating water tank 9 and the floor heating coil 17; the floor heating circulating water pump 19 is cyclically connected to the floor heating coil 17.

[0027] The solar-air energy combined trigeneration system also includes a domestic water tank 16 and a mixing valve 21; a second temperature control valve 26 is provided between the domestic water tank 16 and the heating water tank 15; the mixing valve 21 is provided between the water outlet of the domestic water tank 16 and the tap water outlet pipe.

[0028] The following describes the working principle of the temperature control water supply system according to the climate:

[0029] In winter, the second evaporator 11 in the air source heat pump system does not work, and the first evaporator works 10, and the first evaporator 10 absorbs waste heat from the exhaust port of fresh air. The second condenser 24 does not work, and the first condenser 18 works, which is regulated by the first temperature control valve 25. The first condenser 18 heats the heating water tank 15. The solar collector 7 in the solar thermal system exchanges heat with the heat exchanger coil 8, and the heat exchanger coil 8 supplements the heating water tank 15. The heating water tank 15 is connected to the circulating water tank 9 by the circulating pump 14, and the circulating pump 14 works continuously to maintain a stable flow of hot water between the circulating water tank 9 and the heating water tank 15, and continuously supplies heat to the circulating water tank 9. During winter heating, the circulating water tank 9 exchanges heat with the floor heating heat exchanger 23, and the floor heating heat exchanger 23 heats the floor heating coil 17. The floor heating circulation water pump 19 maintains the hot water flow in the floor heating coil 17. The hot water of each route is divided into the floor heating coil 17 at the water distributor 28 to provide indoor heating for residents, and then converges at the collector 27 to flow to the floor heating heat exchanger 23. When hot water is supplied in winter, the hot water in the heating water tank 15 is heated to a preset temperature and then sent to the domestic water tank 16 through the second temperature control valve 26. When the user needs warm water, the hot water in the domestic water tank 16 is mixed with tap water through the mixing valve 21 to obtain domestic water with a suitable temperature.

[0030] In summer, the first evaporator 10 in the air source heat pump system does not work, and the second evaporator 11 works. The second evaporator 11 absorbs heat from the circulating water tank 9 to reduce the water temperature in the circulating water tank 9. The circulating pump 14 between the circulating water tank 9 and the heating water tank 15 is not turned on, and the circulating water tank 9 and the heating water tank 15 are independent of each other. In summer cooling, the circulating water tank 9 exchanges heat with the floor cooling heat exchanger 23, and the floor cooling heat exchanger 23 cools the floor cooling coil 17. The floor cooling coil 17 exchanges heat with the indoor air to reduce the indoor temperature. When hot water is supplied on sunny days in summer, the first temperature control valve 25 is feedback-regulated, the second condenser 24 works, and the first condenser 18 does not work. The solar collector 7 heats the heating water tank 15 alone, and the hot water heated to the preset temperature is sent to the domestic water tank 16 through the temperature control electronic valve 12. The hot water in the domestic water tank 16 and the tap water are mixed in the mixing valve 21 to obtain domestic hot water with a suitable temperature.

[0031] When hot water is supplied on cloudy days in summer, the first temperature control valve 25 is used for feedback regulation, the second condenser 18 does not work, and the first condenser 24 works. The second condenser 24 and the solar collector 7 heat the heating water tank 15 together to provide domestic hot water at a suitable temperature. The solar collector 7 is arranged on the roof, and the collected heat is used to assist in heating the heating water tank 15 through the heat exchanger 8.

[0032] In addition, the fresh air system includes a total heat exchanger 2, a ventilation duct 3 and a centralized duct 1 arranged indoors. The total heat exchanger 2 operates to allow the indoor air to flow, so that the hot (cold) water supplied to the indoor floor cooling and floor heating coil 17 can fully convect with the indoor air to reach a suitable temperature. The indoor exhaust gas is discharged to the ventilation duct 3 between the photovoltaic power generation panel 4 and the outer wall. The discharged indoor exhaust gas cools the photovoltaic power generation panel 4, thereby increasing the service life of the photovoltaic panel 4 and the efficiency of the photovoltaic panel 4. The gas heated by the photovoltaic power generation panel 4 is sent to the first evaporator 10 for preheating.

[0033] The photovoltaic panel 4 absorbs solar energy to generate electricity, which is supplied to the air source heat pump. The excess electricity is stored in the battery 5 arranged on the roof and supplements the electricity for daily use after passing through the inverter 6. When the electricity generated by the photovoltaic panel 4 is not enough to maintain the air source heat pump, the electricity for daily use provides driving energy for it.

[0034] In summary, in winter, the first evaporator 10 of the system uses the waste heat of indoor exhaust gas to transfer the heat to the first condenser 18 for heating the heating water tank. The circulating pump 14 between the heating water tank 15 and the circulating water tank 9 works, and the hot water mixed flow achieves the common heating of the two water tanks. The circulating water tank 9 is connected to the coil 17 under the floor for indoor heating, meeting the common needs of heating and hot water. The fresh air system introduces outdoor fresh air into the room and discharges indoor exhaust gas to the ventilation channel 3 of the photovoltaic panel, so as to ensure fresh air indoors while maintaining the photovoltaic panel 4 at the optimal temperature, thereby improving the life and efficiency of the photovoltaic panel 4. The exhaust gas passing through the photovoltaic panel 4 is discharged to the first evaporator 10 to achieve circulation. The working conditions change greatly in summer. On cloudy days in summer, the system absorbs the heat of the circulating water tank 9 through the second evaporator 11 to heat the heating water tank 15, achieving the effect of water cooling of the circulating water tank 9 and water heating of the heating water tank 15. At this time, the circulating pump 14 does not work, and the two water tanks are independent of each other. The heated hot water is provided for use, and at the same time, the circulating water tank 9 is connected to the coil 17 under the floor to reduce the indoor temperature, meeting the common needs of hot water and refrigeration. The fresh air system introduces outdoor fresh air into the room and discharges the indoor exhaust gas to the ventilation channel 3 of the photovoltaic panel, thereby ensuring fresh air in the room while reducing the temperature of the photovoltaic panel 4, thereby improving the life and efficiency of the photovoltaic panel 4. The exhaust gas passing through the photovoltaic panel 4 is directly discharged to the outside without being used. On sunny days, the solar collector 7 heats the heating water tank, and the second evaporator 11 also absorbs heat from the circulating water tank 9, but will discharge the heat to the environment through the second condenser 24, and the other working conditions remain unchanged.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A comprehensive energy-saving temperature-controlled water supply system for living buildings, characterized by: The invention comprises a building body and a fresh air system, a photovoltaic power generation system, and a solar-air energy combined trigeneration system inside the building body; the fresh air system comprises a centralized pipeline (1), a total heat exchanger (2), and a ventilation pipeline (3); the photovoltaic power generation system comprises a photovoltaic panel (4); one end of the ventilation pipeline (3) is connected to extend to the inside of the building body, and the other end extends to the photovoltaic panel (4); the total heat exchanger (2) drives the air inside the building body to flow through the ventilation pipeline (3) to reach the surface of the photovoltaic panel (4); the centralized pipeline (1) is connected to and arranged on a side of the photovoltaic panel (4) away from the ventilation pipeline (3); the solar-air energy combined trigeneration system comprises an air source heat pump, a first evaporator (10), a first condenser (18 ), a heating water tank (15), a circulating water tank (9) and a floor heating coil (17); the power output end of the photovoltaic panel (4) is electrically connected to the power input end of the air source heat pump and the storage battery (5); the first evaporator (10) is correspondingly arranged at the air outlet of the centralized pipeline (1); the first evaporator (10) is connected to the first condenser (18); the first condenser (18) is correspondingly arranged in the heating water tank (15); a circulating pump (14) is connected between the circulating water tank (9) and the heating water tank (15); the circulating water tank (9) is connected to the floor heating coil (17); the floor heating coil (17) is correspondingly laid at the indoor bottom position of the building body; The solar energy-air energy combined trigeneration system further comprises a second evaporator (11) and a second condenser (24); the second evaporator (11) is correspondingly arranged inside the circulating water tank (9); the second condenser (24) is in communication with the second evaporator (11); The solar energy-air energy combined trigeneration system further comprises a floor heating circulating water pump (19) and a floor heating heat exchanger (23); the floor heating heat exchanger (23) is cooperatively arranged between the circulating water tank (9) and the floor heating coil (17); the floor heating circulating water pump (19) is connected to the floor heating coil (17) in a circulating manner; The solar-air energy combined trigeneration system further comprises a domestic water tank (16) and a water mixing valve (21); a second temperature control valve (26) is provided in communication between the domestic water tank (16) and the heating water tank (15); and the water mixing valve (21) is provided in communication between the water outlet end of the domestic water tank (16) and the tap water outlet pipe.

2. The comprehensive energy-saving temperature-controlled water supply system for living buildings according to claim 1 is characterized in that: The photovoltaic power generation system further comprises a solar thermal collector (7); a heat dissipation end of the solar thermal collector (7) is correspondingly extended and arranged inside the heating water tank (15).

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