689results about How to "Improve heat collection efficiency" patented technology

It relates to a method and device of changing solar energy to chemical energy. It accumulates the solar energy and changing it to heat energy ranging from 150deg.C-300deg.C, providing reaction heat for the liquid fuels, allowing the middle and low level solar energy changing and stored into high level chemical energy, with the liquid being carbinol or dimethyl ether synthetic fuel, with the catabolite being hydrogen and monoxide formed gas. It can be used for multi purposes, providing fine synthetic fuel and material for customers.

The invention relates to a solar low-temperature thermal power generation and combined heat and cold supply system, which solves the problems that the lower-temperature solar thermal power generation has lower efficiency, is unsuitable for small-scale application and can not supply electric energy, cold energy, warm air and hot water simultaneously. The system consists of a composite paraboloid heat collector system, a phase-change heat storage system, an organic Rankine cyclic power generating system, an absorption and refrigeration system, a hot water supply system and a warm air supply system which are connected in parallel. An inlet of a steam turbine of the power generating system is communicated with an organic working substance outlet of an evaporator; an outlet of the steam turbine is communicated with a mixer through a heat regenerator; an air suction port of the middle part of the steam turbine is communicated with another end port of the mixer through a pipeline; the other side of the heat regenerator is connected in series with a condenser; a third port of the mixer is communicated with an organic working substance inlet of the evaporator through a pump; and the output end of the steam turbine is connected with a power generator. The system has high operating efficiency and three combined supplies of heat, power and cold, is suitable for small-scale application, is easy to build and low in cost, does not need to consume one-off energy and is favorable for environmental protection.

The invention discloses a phase change thermal storage type auxiliary solar hot-water device of an air source heat pump, comprising an indoor air cooled heat exchanger, an outdoor air cooled heat exchanger and a rotator compressor, wherein the outdoor air cooled heat exchanger is connected with the indoor air cooled heat exchanger respectively through a four-way reversing valve and an expansion valve; the rotator compressor is connected with the four-way reversing valve in parallel; the indoor air cooled heat exchanger is connected with a water cool tube heat exchanger; and the outdoor air cooled heat exchanger is connected with a phase change thermal accumulator in parallel. The device of the invention can carry out phase change energy storage when solar radiation is overmuch in summer, thereby avoiding over high water temperature to exceed use requirement, sever water tank heat dissipation and other drawbacks, and when the solar radiation is in short, heat supplement is carried out through phase change to release energy, and an air source heat pump is used to assist heating in necessity.

The invention provides an energy stepped system based on pipe network arrangement, flow and temperature potential control and a distribution controlling method, particular to a heat fluid circulating system based on solar heat collection and absorption and heat release by snow and ice melting which applies an energy stepped dual-flow pipe network arrangement mode and an all-weather real-time adjustment mode to roads and other similar building structure bodies. The system and the control method are applied to a linking system of two processes of solar heat collection of the road surface and snow and ice melting in winter, thereby strengthening the internal heat exchange of the road surface, not only ensuring effective collection of solar energy in summer and realizing higher outlet temperature of the circulating fluid, but also achieving rapid smelting of accumulated snow and ice at the middle section of the traffic road surface in winter, improving the condition of the traffic road surface and realizing the maximum utilization rate of energy of a dual-circulating fluid in the processes of heat collection in summer and the heat release in winter.

The invention discloses a solar heating system, which comprises a solar heat-collecting circulation loop (10), a heat pump (34), a heating circulation loop (20), a heat supply output circulation loop (30) and a controller (40), wherein the heating circulation loop comprises circulating water pumps (42, 43, 44, 45 and 46), a heat exchanger (32), a heating heat storage tank (23) and a heating heat supply water tank (24); a hot water tank (21) is connected with the heating heat storage tank through the circulating water pumps and the heat exchanger; the heating heat storage tank is connected with the heating heat supply water tank through a water source heat pump (33); and the solar heat-collecting circulation loop, the heat pump, the heating circulation loop and the heat supply output circulation loop are electrically connected with the controller respectively. The time-sharing work system is formed between the solar heat-collecting circulation loop and the heat pump in the heating system; the heating system has lower operation cost and can also provide clean domestic hot water under the condition of heating priority. The invention also relates to a method for heating and supplying hot water for the solar heating system.

The invention relates to a novel black substance application. The novel black substance application is characterized in that black substances are directly used as solar heat collection layers by the aid of excellent photo-thermal conversion characteristics of the black substances, and the black substances include vanadium extraction tailings, industrial black waste residues, natural black minerals, black compounds and black chemical products. A novel application method is characterized in that the black substances are directly used as the solar heat collection layers to construct a building-integrated solar air collector and a building-integrated solar water heater. Compared with the prior art, the novel black substance application and the novel application method have the advantages that construction cost is lowered greatly, service lives of the solar air collector and the solar water heater are prolonged greatly and can be as long as that of a building, the solar air collector and the solar water heater are high in heat collection efficiency, better in heat collection effect, less prone to attenuation after long-time use and quite simple to mount and maintain and can be integrated with the building, various potential safety hazards are eliminated, utilization rate of the solar water heater is increased, and the novel black substance application and the novel application method can be widely applied to the field of solar water heaters.

The invention provides a high-efficiency flat-plate heat collector, which includes a glass panel, a heat-absorbing plate, an insulation layer and a back plate. The cavity between the glass panel and the heat-absorbing plate is filled with inert gas, and the front and rear ends of the cavity are respectively An air injection port and an exhaust port are provided, the air injection port is provided with a sealing protection cap, and the exhaust port is provided with a sealing part. The inert gas injection adopts a one-way passage structure, and the gas can only be injected in one direction. The inert gas is injected between the sealed glass panel and the heat collecting plate, because the activity of the inert gas is reduced, thereby reducing the heat dissipation of the heat collector itself, increasing the temperature of the surface of the heat collecting plate and the heat collection efficiency of the solar heat collector.

The invention discloses a building flat plate shaped split typed wall-mounted vacuum solar energy superconductive heat collector, comprising a separating heat pipe formed by a flat plate collector with an automatic liquid separator, a circulating steam pipe, a circulating liquid pipe, a condenser and a heat accumulator. A plurality group of precise metering holes and capillaries are horizontally distributed between a liquid storage accumulator and a finned tube which are communicated with the circulating liquid pipe. The work condition of balanced film high temperature evaporation can be realized. The heat collector is characterized in that the heat collector has high temperature heat collection output, high efficiency and high energy heat transmission, long distance circulation without pump, low temperature and freeze proof, can be harmonized with buildings, is economical, has long service life and so on. The heat collector exploits the novel applied field of the solar energy with high temperature and separation structure, which can form devices of solar energy boiled water generator, radiant heater, air conditioner, additional water heater, etc. The heat collector is presented in a square and flat shape, which can be mounted and hung on the roof, the wall, the position above the window, the position below the window and the balcony of the buildings, is beautiful and harmonious. The heat collector is suitable for being used in high rise buildings with multiple floors, which is an ideal technology of solar energy for building integration.

The invention relates to a method for preparing nano fluid for a heat transfer medium of a solar heat exchange system, which comprises the following steps: selecting one of Al2O3, TiO2, ZnO, Ni and Cu nano grains with the grain diameter of 5 to 100 nanometers as additive, selecting water or water / ethylene glycol or water / propylene glycol mixture as base solution, adding surfactant into the solution, and strongly stirring and ultrasonically oscillating to form the nano fluid which is used for the heat transfer medium of the solar heat exchange system, wherein the Al2O3, TiO2, ZnO, Ni or Cu nano grains account for 0.1 to 3 volume percent of the volume of the nano fluid. The practical detection result for placing the solar heat exchange system on the roof shows that the nano fluid can remarkably improve the heat collecting efficiency of the solar heat exchange system, has the advantages of high heating speed, low cooling speed, low cost and simple preparation process and can remarkably improve the heat collection and heat utilization efficiencies of the existing solar heat collecting system.

This invention discloses a building method of solar energy funnel electricity-generating device. This solar energy funnel electricity-generating device consists of the heat-adding shed, solar funnel and the spiral generator unit. Building the heat-collecting shed on the bevel face of the slope is benefit to direct at the sun, to enlarge the effective surface that the heat-collecting shed can obtain the sun rays, to enhances the efficiency. Fixing the solar energy funnel on the top of slope, can improve the height of the funnel with no or little building cost, and improve the efficiency of the system and reduce the electricity generating cost of system. The top of the heat-collecting shed communicated with the bottom of the funnel, the floor of the heat-collecting shed paves stones evenly or insulating layer. Paving insulating layer can obtain large quantity of electricity generation and apply to merge and synchronize two or more power grids. Paving stones and part-dividing of heat-collecting shed can obtain the regular quantity of electricity generating. This device can be used as an independent electricity-supplying system.

The invention relates to a pressure-bearing type solar collector based on a groove-type parabolic mirror. The parabolic mirror is characterized by comprising an elliptical reflecting canister, a housing, a groove-type parabolic condenser and a pressure resistant metallic heat collection pipe group, wherein the reflecting canister adopts an elliptical stainless steel mirror reflecting canister or a glass reflecting canister; a light inlet is formed in the elliptical reflecting canister; the housing is arranged outside the reflecting canister; a gap between the housing and the reflecting canister is filled with heat insulating materials; the pressure resistant metallic heat collection pipe penetrates the reflecting canister; and the light condensation focus of the groove-type parabolic condenser is positioned at one focus near or around one side of the light entrance port. According to the solar collector provided by the invention, the heat absorbing medium is positioned in the pressure resistant metallic heat collection pipe groups in the black body cavity, so as to enable the whole heat-collector to manufacture the pressure-bear structure smoothly, the requirement of the process and material is decreased greatly, the manufacturing cost of the pressure-bearing type solar collector based on the groove-type parabolic mirror is decreased, the performance of the heat collector is more steady and reliable, and the safety coefficient is high.

The invention provides a solar heat absorber which comprises an inlet, a channel part and a collecting part. Heat-collecting media enter the solar heat absorber from the inlet. The channel part is arranged to be connected with inlet fluid so that the heat-collecting media can enter the channel part through the inlet. The collecting part is arranged to be connected with fluid of the channel part so that the heat-collecting media can enter the collecting part from the channel part. According to the solar heat absorber, ceramic particles are adopted to serve as the heat-collecting media. The solar heat absorber operates stably and is high in heat-collecting efficiency. In addition, the invention further provides a solar heat collecting system comprising the solar heat absorber, and a solar power generation system comprising the solar heat collecting system.

The invention discloses a double-stage heat storage trough type solar thermal power generation system. The system comprises a double-stage trough type solar heat collection field, a double-stage heat storage sub-system and a power generation sub-system. The double-stage trough type solar heat collection field comprises a high-temperature heat collection field and a low-temperature heat collection field and is used for receiving and collecting solar radiation energy. The high-temperature heat collection field is used for converting the collected solar radiation energy into heat of high-temperature heat conducting oil. The low-temperature heat collection field is used for converting the solar radiation energy into heat of low-temperature heat conducting oil. The double-stage heat storage sub-system comprises a high-temperature heat accumulator and a low-temperature heat accumulator. The high-temperature heat accumulator is used for storing the high-temperature heat conducting oil output by the high-temperature heat collection field. The low-temperature heat accumulator is used for storing the low-temperature heat conducting oil output by the low-temperature heat collection field. The power generation sub-system is used for converting the heat of the heat conducting oil into steam, converting the steam into electric energy and outputting the electric energy. By using the system disclosed by the invention, a problem of reduction of heat collecting efficiency resulted from high average heat absorption temperature of a mirror field is resolved; furthermore, problems of high high-temperature resistance performance of the mirror field to the conducting oil, high investment of the conducting oil and high power generation cost are resolved.

The invention discloses an active-passive cooperative heat storage wall heating system of a solar greenhouse, and belongs to the technical field of agricultural facilities. The active-passive cooperative heat storage wall heating system mainly comprises a phase-change heat storage wall, a concentration-type solar air heat collector system, an active heat storage heating system body and an equipment control unit. The phase-change heat storage wall is composed of a cement mortar layer, a phase-change heat storage layer, a bearing building block layer and a thermal insulation layer from the indoor side to the outdoor side, wherein the phase-change heat storage layer is formed by pouring phase-change materials packaged through steel drums, heat storage coil pipes, gravel and cement. The solar air heat collector system is formed by connecting multiple groups of condensation-type solar air heat collectors in series, and a sunshade device used in summer is arranged above the heat collectors. The active heat storage heating system body is composed of a heat collector, thermal insulation pipes, a heat storage coil pipe, a frequency conversion fan, air openings and air valves. The equipment control unit is composed of a controller, a temperature sensor and electric adjusting air valves. According to the active-passive cooperative heat storage wall heating system, active and passive heat collection, heat storage and heat supply of the wall of the solar greenhouse are combined, therefore, the heat storage and thermal insulation performance of the wall of the solar greenhouse can be obviously enhanced, the solar energy utilization rate of the greenhouse can be obviously increased, and the adjusting capacity of the heat storage wall of the solar greenhouse to the heat environment in the greenhouse is improved.

An electronic control unit inputs from temperature sensors a temperature of the heating side of a thermoelectric conversion section assembled to each of brake units provided for left and right rear wheels. When the temperature of the heating side is equal to or lower than a predetermined temperature, the electronic control unit drives and controls a brake hydraulic pressure control section so as to operate the brake units preferentially over brake units provided for left and right front wheels. With this operation, each of the brake units generates friction heat, and heats the heating side of the corresponding thermoelectric conversion section, whereby the thermoelectric conversion section efficiently collects thermal energy and generates electrical power. Meanwhile, when the heating side temperature is higher than the predetermined temperature, the electronic control unit drives and controls the brake hydraulic pressure control section so as to decrease the proportion of the braking forces applied by the brake units and increase the proportion of the braking forces applied by the brake units.

The invention discloses an automatic tracking solar heat collector pedestal, and belongs to the energy collection field; the automatic tracking solar heat collector pedestal comprises a H-shape support and a pedestal; a sensitization assembly can monitor the sun mobile conditions, and sends the mobile conditions to a motor control module, thus respectively controlling a rotary motor and a lifting motor, arranged in the solar heat collector pedestal, to operate; therefore, the solar heat collector carried by the solar heat collector pedestal can be directly irradiated by the sun in a long time, thus prolonging sun light irradiation reception time, and improving heat collector thermal-arrest efficiency.

The invention relates to a solar thermophotovoltaic (STPV) system. The STPV system comprises a photovoltaic module, a photothermal module and a mounting frame, wherein the photovoltaic module is arranged at the upper part; a heat collection part of the photothermal module is arranged at the lower part; the photovoltaic module and the photothermal module are fixed together through the mounting frame; and the front side and the rear side of the photovoltaic module are packaged with transparent material. The STPV system has the advantages of high photoelectric conversion efficiency, high heat collection efficiency, high convenience in installation and the like, and can be applied to a building in the way of being laid on a flat roof, a slope roof, a balcony, a rain shed and the like.

The present invention provides an air-solar dual-heat source synchronous composite type heat pump apparatus, which comprises a solar collecting and storage part, and an air-liquid dual-heat source synchronous composite type solar heat pump part. Wherein, the solar collecting and storage part comprises a solar collector (4), a solar storage water tank (5), a living water tank (6), a heat exchanging coil pipe (17), a first circulation water pump (7), a second circulation water pump (8), a connecting pipeline and a valve. The composite type solar heat pump part comprises a compressor (1), a fin sleeve casing composite type heat exchanger (2), a user side heat exchanger (3), a first capillary tube (13), a second capillary tube (14) and a check valve (15), a four-way reversing valve (16), and the connecting pipeline and the valve and so on. The heat exchanger (2) comprises an outer sleeve casing (22), an inner sleeve casing (23) through arranged inside the outer sleeve casing and a fin (21) combined with the outer wall of the outer sleeve casing. A ring type space existed between the outer wall of the inner sleeve casing and the inner wall of the outer sleeve casing is a medium channel (19), and another medium channel (18) is formed by a pipe cavity of the inner sleeve casing. A third kind of medium channel (20) is formed between the outer wall of the outer sleeve casing and the fin.

The invention is a solar-gas engine heat pump heating device, namely a heating device integrating the solar energy utilization technique with the gas engine heat pump technique, composed of solar heat collecting system, gas engine heat pump system and water circuit circulating system and comprising engine, compressor, heat preservation water tank, expansion valve, tee valve, intermediate heat exchanger, heat collector, air source evaporator, fume heat exchanger and flow regulating valve. And it has three different working modes: when external solar radiation intensity is enough high, the gas engine heat pump does not work and it can meet the requirements by directly utilizing solar energy; when the solar radiation intensity is so low that the water temperature in the water tank is very low, the heat pump is switched on and works with the air as heat source; and when the solar radiation intensity is intermediate, the gas engine heat pump works with the solar heated working medium as heat source. And it can in all weathers and continuously supply 80-90 deg.C hot water.

The invention relates to a straight through vacuum solar collecting pipe, comprising a glass pipe, wherein, two ends of the glass pipe respectively thermally seal a metal heat absorbing pipe; the outer surface of the metal heat absorbing pipe is coated with solar selective absorbing coating; and a vacuum vent is arranged on the wall of the glass pipe. The invention is characterized in that: a sylphon bellows is respectively arranged on two ends of a gap between the glass pipe and the metal heat absorbing pipe; an outer end of each sylphon bellows is welded with a metal end cover of the end into a whole through a transitional ring; an inner end of each sylphon bellows is connected with a transitional pipe which passes through the inside of the sylphon bellows and the metal end cover of the end to be welded to the outer end of the metal heat absorbing pipe; and a vent-pipe vacuumizes between the glass pipe and the metal heat absorbing pipe into high vacuum. The straight through vacuum solar collecting pipe effectively improves the heat-collecting efficiency and the service life of the integral collecting pipe, can be widely applied in the fields such as solar cooling, industrial heating, seawater desalination and solar thermal power generation.

The composite parabolic light focusing solar rice cooker includes pressure rice cooker and square heat collector array comprising composite parabolic light focusing units. The pressure rice cooker has housing, rice utensil frame, water tank, water pipeline and heat exchanger. The heat exchanger has its two ends extending beyond the housing and connected to the medium input pipe and output pipe of the square heat collector array to form the medium flow loop, in which there are medium storage and circulating pump. The present invention performs heat exchange between heat medium inside the loop and water around the heat exchanger to evaporate water and the heat medium may be scale-proof and cold-proof medium for convenient use. The composite parabolic light focusing units have antiageing light condensers and long period high heat collecting efficiency.

The invention discloses a heat supply and refrigeration system combining spatial energy with ground source energy, which comprises a heat collector, a heat storage water tank group, an air energy machine set, an expansion tank, a lithium bromide absorption type refrigerating unit, an auxiliary heating device, a climatic conditioning cabinet, a ground heating cooling system, a water pipe, a temperature control pump, a temperature control exhaust valve, a ground source hot water supply pipe and a water pump, wherein two hot water collection tanks A and B are arranged at the top part of the heat collector, and the ground source hot water is preferably used as water supply of the heat collector in winter. The water tank A is matched with air energy to provide circular hot water for ground heating radiation in winter and is matched with the auxiliary heating device to provide heat medium water to a solar refrigeration air conditioner in summer, the air energy machine set is matched with the ground source energy to refrigerate in summer, and the water tank B is used for providing domestic hot water for a long time. The heat supply and refrigeration system disclosed by the invention is smart in design, novel in conception, simple in structure and low in manufacturing cost, and solves the problem that a solar water heater and an air energy water heater cannot provide hot water if affected by weather, realizes the purposes of supplying heat in winter and refrigerating in summer and circularly utilizes the hot water with afterheat, so as to provide domestic hot water and high temperature hot water for 24 hours in the whole year of 365 days, so that the heat supply and refrigeration system achieves the social benefit of energy conservation and environment protection and the economic benefit of cost reduction.

The invention discloses a photovoltaic photo-thermal integrated device with a night radiation refrigeration function. The device comprises a body module and a transmission module; the body module is abox body with openings in the top surface and the bottom surface, a heat collecting plate and a radiation refrigerating plate are arranged in the box body, the heat collecting plate and the radiationrefrigerating plate form a closed cavity with four side walls of the box body, the closed cavity forms a fluid heat exchange cavity, and a water inlet and a water outlet are formed in the two side walls of the box body; photovoltaic cells are uniformly arranged on the outer surface of the heat collecting plate of the closed cavity, a glass cover plate covers the position, corresponding to the opening of the box body, of the heat collecting plate, and a full-wave-band high-transmittance material film covers the position, corresponding to the opening of the box body, of the radiation refrigerating plate; and the transmission module comprises a motor, two connecting rods, two cranks, two rotating shafts, two supporting shafts and a bracket, so that the top surface and the bottom surface of the box body can be freely switched by starting the motor. The device integrates photovoltaic power generation, solar heat collection and night radiation refrigeration functions, and has the advantagesof being high in heat collecting efficiency, adjustable in angle, good in practicability and the like.

The invention relates to a solar high-temperature thermochemical coupling phase-change reactor. The solar high-temperature thermochemical coupling phase-change reactor comprises a CPC (Card Programmed Calculator) secondary optical collector, a quartz glass window, a heat plate, a heat pipe and a cylinder body, wherein a main body is coupled by the heat plate and the heat pipe, the heat plate is positioned at a photothermal conversion side, the heat pipe extending out of the heat plate is positioned at a reaction side, and the heat plate and the heat pipe are communicated into an integer; a heat absorption cavity is formed by the quartz glass window, the heat plate positioned at a heat absorption side and the inner wall of the cylinder body; and a reaction cavity is formed by the heat plate positioned at the reaction side, the heat pipe and the cylinder body. Sunlight is converged and then shines on the heat absorption side of the heat plate, optical energy is converted into heat energy, the heat energy is transferred to an internal working medium through the heat absorption side of the heat plate, the internal working medium transfers heat to the heat plate positioned at the reaction side and the wall surface of the heat pipe through phase-change heat transfer, and a reactant absorbs the heat emitted from the wall surface for chemical reaction. The solar high-temperature thermochemical coupling phase-change reactor can be used for intermediate-high temperature thermal chemical reaction, i.e. the pyrolysis or the reduction of metallic oxides, and the like, prevents the sintering or the damage caused by local overheating of the surface of the heat absorption side, reduces the temperature gradient of the reaction cavity and increase the efficiency and the stability.

The invention relates to an internal-condensation capacity-reducing solar medium and high temperature heat collection pipe and a method for manufacturing the same. The heat collection pipe comprises a vacuum internal-condensation solar heat collector, wherein the vacuum internal-condensation solar heat collector consists of an outer cover tube which is made of a light-transmitting material, a heat absorption tube which is coaxial with the outer cover tube and a composite parabolic reflecting plate which is assembled between the outer cover tube and the heat absorption tube; a heat energy conductor is arranged in the vacuum internal-condensation solar heat collector; the heat energy conductor consists of a metal sleeve, a metal flow guide cavity tube which is assembled in the metal sleeve, and heat conduction media which are filled in the metal sleeve and the metal flow guide cavity tube; the metal sleeve is inserted into an internal cavity of the heat absorption tube and tightly contacted with the heat absorption tube; and a heat conduction heat medium transmission path is formed between the metal flow guide cavity tube and the metal sleeve. The preparation steps of the high temperature heat collection pipe are as following: manufacturing focus solar collector in vacuum, processing heat sensor, and then assembling and moulding. The internal-condensation capacity-reducing solar medium and high temperature heat collection pipe is high in heat collection efficiency, high in heat transfer speed and safe, and can convert solar energy into a medium and high temperature heat source for use.

Disclosed is a solar energy water heater of vacuum glass cover heat pipe plane type, comprising tank consisted of thermal insulating material and outer gimbal, vacuum plane glass above the tank, absorber plate consisted of heating pipe and fin, condensing zone of the heat pipe and recycling water tank are connected, the water tank and water storage are connected or the condensing zone of heat pipe is directly connected to water storage, and absorber plate is under the vacuum plane glass. The invention has no problems of icing, scale formation and atmospheric corrosion, fairly good red flared radiation can be emitting from heat collector inside because of high level of transparency of the vacuum plane glass to sun radiation but opaque to red flared radiation, decreasing radiation heat loss to absorber plate. Besides, heat pie has fast start-up, high sensitiveness, wide work range, fast heat transfer, only oneway heat exchange between heat collecting pie, and when the sun radiation is fairly low, heat elimination of heating working substance to environment can be reduced.

The invention discloses an integrated pressure-bearing heat pipe flat-plate solar water heater and belongs to the field of flat-plate solar water heaters. The solar water heater comprises main components, such as a water tank, a flat-plate heat collector, a bracket and the like, wherein a heat absorption plate core of the flat-plate heat collector is formed by welding a heat pipe and an aluminum plate or a copper plate on which a heat absorption coating is plated; and a condensation section of the heat pipe is positioned outside the heat collector and inserted into the water tank and directly exchanges heat with water in the water tank. Due to an integrated design, the flat-plate solar water heater has the characteristics of high heat collection efficiency and heat absorption speed, compression resistance, frost resistance, high impact resistance, long service life and the like.

The invention discloses a heat absorption core of a collector used for a solar heat pump water heating system, a naked plate type collector, a collector with a glass cover plate as well as a direct-expansion solar heat pump water heating system. The naked plate type collector and collector with the glass cover plate are connected through an electromagnetic valve and a refrigerant copper pipe and, a PLC (Programmable Logic Controller) controls the open and close of the electromagnetic valve according to different external conditions so as to realize the separated operation and series operation of the naked plate type collector and the collector with the glass cover plate. Refrigerant gas through evaporation and compression enters a plate-type heat exchanger so as to carry out countercurrent flow heat exchange with circulating water, hot water temperature is fed back to a controller through a temperature sensor, and the controller controls the open and stop of a compressor. With the structure, the system has the advantages of high energy efficiency ratio, good environmental adaptation, simple structure and the like and is environment-friendly and energy-saving.

The invention discloses a method and a device for a trough solar heat collector to automatically track solar trace. The method comprises the following steps of: arranging a fulcrum bushing on the trough solar heat collector, fixing the fulcrum bushing on a supporting shaft of a pedestal, arranging two crankshafts on the fulcrum bushing, controlling two hydraulic cylinders to push or pull the two crankshafts to rotate around the supporting shaft via a hydraulic control device through a solar trace sensor or a DPU controller, and adjusting postures of the trough solar heat collector. The invention adopts the solar trace sensor or the DPU controller to control a solar tracking system, so the trough solar heat collector can normally work in sunny days, can also normally work in cloudy days, and can automatically return to the initial state which begins to receive thermal energy of sunlight in the morning at night. The method and the device have the advantages of good universality, high tracking accuracy, good condensation, and high heat collection efficiency.