472results about How to "Improve heat absorption efficiency" patented technology

This invention provides buildings with a modular air conditioning system that utilizes solar energy for heating air. This invention contains a solar collector assembly, an inlet assembly and an outlet assembly. The solar collector assembly further comprises a transparent panel, a heat-absorbing set and a support base, and forms paths for heating the air, wherein the heat-absorbing set is made of several simple, light-weight modular heat-absorbing units to form several heat-absorbing channels. Such a design not only can fully utilize the heat-absorbing space on the roof and save the cost for being displayed in marketing channels, but also can be constructed by the users in accordance with their own needs, so as to save cost in modularization. The inlet and outlet assemblies communicate to the heat-absorbing channels in the solar collector assembly and are respectively connected to the pipes and paths leading into and out of the buildings. By switching and adjusting the openings of these pipes and paths, in winter, the preheated air will be introduced into buildings; and in summer, the hot indoor air will be expelled out of the buildings and fresh air will be guided into the buildings. As a result, a more economical air conditioning system is formed.

The invention discloses a novel phase-change material composition. The novel phase-change material composition mainly comprises carbon nanotubes, graphene, fumed silica, metal or metal oxide particles and a phase-change material. The carbon nanotubes, graphene and metal or metal oxide particles can further accelerate heat transmission. The phase-change material is used for improving a hot end initial temperature absorption rate. The fumed silica has effects of precipitation prevention and thickening and can prevent graphene and particle aggregation settlement after heat absorption liquefaction of the phase-change material. The carbon nanotubes, graphene and metal or metal oxides can finally form a full 3D network comprising particles (metal or metal oxides), wires (carbon nanotubes) and planes (graphene) in the fluid (of phase-change material subjected to heat absorption melting). The novel phase-change material composition has high heat conductivity and low thermal resistance value, has high specific heat capacity, greatly improves phase-change material heat absorption, heat storage and heat radiation efficiency and has a high practical value.

A silicon carbide ceramic foam solar energy air heat absorber uses silicon carbide ceramic foam materials as solar energy absorber. The silicon carbide ceramic foam absorber is wrapped with an insulating layer (2). A radiant heat flux (3) projects onto the surface of the silicon carbide ceramic foam absorber (1) or into an artificial blackbody cavity (9) and is received by the silicon carbide ceramic foam absorber (1). Cold air (4) flows in from the side of the silicon carbide ceramic foam absorber (1) positive to the radiant heat flux (3). Hot air (5) is obtained through heat exchange of thecold air and the radiant heat flux. Or the cold air (4) flows in from the side of the silicon carbide ceramic foam absorber (1) positive to the radiant heat flux (3) or back to the radiant heat flux (3). The hot air (5) of 700 to 1300 DEG C is obtained through the heat exchange of the cold air and the radiant heat flux through a quartz window (10). The silicon carbide ceramic foam absorber (1) buries an air diversion channel (8) beforehand. The invention can effectively receive radiant heat and emit heat to the air and take advantage of self-sensible heat to store heat at the same time.

This invention provides an air-conditioner that continues a heating operation while performing a defrosting operation. A first bypass circuit 6 is provided for connecting the portion of a heat-pump-type refrigerating cycle between an indoor heat exchanger 3 and a decompressor 4 to the suction side of a compressor 1. The first bypass valve 6 is provided with a two-way valve 7 and a refrigerant heater 8. Further, a second bypass circuit 9 is provided for connecting the portion between a four-way valve 2 and the indoor heat exchanger 3 to the portion between the decompressor 4 and an outdoor heat exchanger 5. The second bypass circuit 9 is provided with a defrosting two-way valve 10. To defrost the outdoor heat exchanger 5, the decompressor 4 and the defrosting two-way valve 10 are closed according to outside air temperature and a fan 19 is rotated to perform a first defrosting operation. When the temperature detected by the temperature means of the outdoor heat exchanger is less than a predetermined value while the first defrosting operation is within a preset period of time, the two-way valve of the second bypass circuit is opened and an outdoor fan is stopped to perform a second defrosting operation.

A cooling device with a thermoelectric conversion element having a heat absorbing surface and a heat releasing surface includes: a heat-absorbing-side heat conductive member connected with the heat absorbing surface in a heat-conductive manner; a heat-releasing-side heat conductive member connected with the heat releasing surface in a heat-conductive manner; a plurality of heat-absorbing-side fin members that is disposed to the heat-absorbing-side heat conductive member, protrudes in an out-of-plane direction from an end surface remote from the heat absorbing surface and extends in a predetermined direction; and a plurality of heat-releasing-side fin members that is disposed to the heat-releasing-side heat conductive member, protrudes in an out-of-plane direction from an end surface remote from the heat releasing surface and extends in a predetermined direction intersecting with the plurality of heat-absorbing-side fin members in plan view.

The invention relates to a flow-bending double-effect heating solar-energy air heat collecting device, comprising an insulation soleplate and a heat collecting device core. The heat collecting device core comprises a heat absorbing board arranged on the insulation soleplate, and a sealed heating air channel is arranged between the heat absorbing board and the insulation soleplate. A horizontal first air-feeding pipeline and a horizontal air-venting pipeline are arranged on the upper part of the heat absorbing board. A horizontal bottom bracket is arranged on the lower part of the heat absorbing board, and a sealed second air-feeding pipeline is arranged in the bottom bracket. Sealed heat collecting tubes are vertically arranged by intervals between the bottom bracket and the air-venting pipeline, and the heat collecting tubes are arranged on the upper part of the face of the heat absorbing board. The upper end and the lower end of the heating air channel are communicated with the corresponding first and second air-feeding pipelines. The upper end and the lower end of the heat collecting tube are communicated with the corresponding air-venting pipeline and the second air-feeding pipeline. A glass cover used for covering the heat collecting device core is arranged on the insulation soleplate. Through two-time heating, the heating distance of the structure is approximately raised by one time. And the heat absorbing efficiency is enhanced and the heating effect is reinforced. One-time circulation temperature rises more quickly.

This invention relates to electroconductive liquid alloy, the design and method for preparing the room temperature liquid and electroconductive alloy GalnSn and GalnSnAg. A metal with its purity being greater than 99.99% is selected and thein is smelted to produce the main alloy Galn. And then, Sn(or Sn and Ag) is (are) added into above mentioned Galn to produce GalnSn or GalnSnAg alloy. The product can be used in fields such as: oral surgery, electronics material and refrigeration system.

The invention provides a pressure type vacuum panel solar thermal collector. A glass cover plate (1) is constituted by an upper glass cover plate (8), a lower glass cover plate (9) and a surrounding sealing strip (5); two opposite end baffle plates (2), two opposite side baffle plates (4), the glass cover plate (1) and a base plate (13) which are arranged at the upper and lower sides of the end baffle plates (2) and the side baffle plates (4) together form a whole; a perfusion fan (3) is arranged on the end baffle plate (2); a non-return air valve (6) is arranged at the inner side of the side baffle plate (4); a bottom insulating layer (12) is arranged on the base plate (13); a side insulating layer (14) is arranged at the inner side of the side baffle plate (4); a heat collecting board (15) is arranged on the bottom insulating layer (12); a heat transferring tube (11) is arranged on the upper surface of the heat collecting board (15); a heating transferring fin (16) is arranged on the lower surface of the heat collecting board (15); an aluminium duct tape (10) is arranged below the heat collecting board (15); and the aluminium duct tape (10) is provided with a plurality of heat pump working medium channels (17).

The invention provides a solar heat collector and a seawater desalination system comprising the same. The solar heat collector comprises heat collection tubes, wherein every two adjacent heat collection tubes are connected by the aid of a heat collection plate, so that the multiple heat collection tubes and the adjacent heat collection plates form a tube-and-plate structure. A solar heat collector system comprises two tube-and-plate structures, a certain included angle is formed by the two tube-and-plate structures, the heat collection tubes have rectangular cross sections, and the heat collection plates are connected with corners of the rectangles. The novel solar heat collector and the seawater desalination system can improve the solar heat absorptivity, so that the desalination efficiency of the seawater desalination system can be improved.

The invention relates to a heat-pipe type panel solar air collector and a heating method thereof. The collector comprises a solar panel heat collection and heat transmission section and an air ventilation heat exchange section. The solar panel heat collection and heat transmission section comprises tempered glass, an efficient heat absorption coating, a heat insulation air layer and a panel heat pipe evaporation section. The back of the efficient heat absorption coating and the obverse side of the panel heat pipe evaporation section are combined organically. The tempered glass covers the outer surface of the panel heat pipe evaporation section organically combined with the efficient heat absorption coating. The heat insulation air layer is arranged between the efficient heat absorption coating and the tempered glass, and the distance from the front of the efficient heat absorption coating to the inner surface of the tempered glass ranges from 20 mm to 50 mm. The air ventilation heat exchange section comprises an air duct, a fan and a panel heat pipe condensation section. The panel heat pipe condensation section is arranged in the air duct, and the fan is arranged on one side of the air duct. The collector has the advantages of being high in heat exchange efficiency, high in reliability, simple in structure, convenient to mount, free of maintenance and long in service life.

The invention relates to an air conditioning system combined by a closed heat source heat pump and evaporative cooling, which comprises a closed heat source tower, a cold accumulation water tank, an air conditioning tail end device and a heat pump set which are connected by a water pipe network, wherein the closed heat source tower is communicated with an air conditioning room through an air duct group. The air conditioning system combined by the closed heat source heat pump and evaporative cooling provided by the invention solves the problems that an evaporative cooling air conditioning set stands idle in winter and the cooling amplitude is limited.

The invention relates to a buried oil-immersed transformer with stage cooling devices. The buried oil-immersed transformer comprises a transformer body, three stage cooling devices and a cooling control system, wherein a first stage cooling device comprises an oil box, transformer oil and cooling fins at the periphery of the oil tank, a second stage cooling device comprises an oil pump, a circulation cooling pipeline, a water tank and a gravity assisted heat pipe, the circulation cooling pipe line comprises a ground cooling segment pipeline and an air cooling segment pipeline, a heat absorption end of the gravity assisted heat pipe and the ground cooling segment pipeline are immersed in water in the water tank, the water tank and the gravity assisted heat pipe are both buried under a ground surface of a basement, a third stage cooling device comprises a ventilation pipeline and a cooling fan, the control system comprises a temperature sensor, a controller and a frequency converter, two signal output ends of the controller are respectively connected with the frequency converter and a control end of the cooling fan. The heat dissipation condition of the buried oil-immersed transformer can be intelligently controlled according to a temperature of an environment where the transformer is located and a load size, and the adaptive capacity to the environment and the overload capacity of the oil-immersed transformer are improved.

The invention relates to a solar collector comprising a heat absorption pipe, wherein, the heat absorption pipe is spirally arranged to form a cavity; one end of the cavity is provided with an openingfor receiving the concentrated incident sunlight; one end of the heat absorption pipe is connected with a working fluid inlet pipe, and the other end is connected with a working fluid outlet pipe; atransparent cover body is covered outside the opening, and the transparent cover body protrudes in the direction deviating from the opening and forms a camber, thus, the concentrated incident sunlightcan transmit the transparent cover body in the direction perpendicular to the camber and enters the cavity so as to reduce the reflection; and meanwhile, the opening is closed by the transparent cover body so as to prevent sand, dust and other impurities from entering the collector and also prevent the heat energy in the collector from being taken out of the collector along with the air circulation, thereby being favorable for enhancing the heat absorption efficiency of the collector.

The invention discloses a preparation method of a metal/aluminum oxide solar selective absorption coating material. The preparation method comprises the following steps: taking a high-purity aluminum sheet as a base body; preparing a porous aluminum oxide mold plate on the surface of the high-purity aluminum sheet according to a twice anodic oxidation method; splashing to form a uniform Au layer on the back of the porous aluminum oxide mold plate to ensure that the porous aluminum oxide mold plate is conductive; finally, preparing Ni, Mo, Co or Fe metal nanowires on the porous aluminum oxide mold plate according to an electrochemical deposition method. The preparation method has the advantages that the production efficiency is high; the cost is low; the heat stability of a formed coating is favorable; the operating temperature can reach up to 400 DEG C, which can meet the requirement of middle-high temperature solar-thermal electric power generation.

The invention relates to an air temperature adjusting system for heat exchange type vehicles and vessels, which comprises an evaporator using alcohol refrigerant, condenser, an ejecting and sucking device, a pump, a heater and a liquid storage tank. The ejecting and sucking device is capable of sucking refrigerant in the evaporator and outputting the refrigerant to the condenser, and the heater is capable of absorbing heat of engine tail gas by means of heat exchanging to vaporize the refrigerant. The heater is connected between the ejecting and sucking device and the pump through a pipe, and the evaporator comprises both of or one of an air-conditioning evaporator and a cooling evaporator. The evaporator is disposed on an engine air inlet pipe or arranged in an engine air inlet filter and used for cooling air flowing into an engine, dropping of air inlet temperature can improve air sucking efficiency of the engine, the engine can be in or close to the optimum operating state, engine power is improved, fuel consumption is reduced, and waste gas emission is reduced.

The invention discloses a tube plate type core device of a flat-plate solar collector and belongs to the technical field of flat-plate solar collectors. The tube plate type core device comprises a pair of round guide collecting tubes with large tube diameters, a plurality of heat absorption row tubes with small tube diameters and a flat-plate absorber plate with an absorption layer on the surface. The guide collecting tubes are provided with a plurality of connection rings which are arranged at intervals. The heat absorption row tubes are special-shaped tubes with flat top surfaces. Each heat absorption row tube has a longer main-body middle section and two shorter same-direction bending sections. A port of each bending section is provided with a round insertion port. The round insertion ports are respectively inserted in corresponding connection rings and are in brazed connection with the connection rings. The flat top surfaces of the heat absorption row tubes and the top edges of the guide collecting tubes are integrally located on the same plane. An ultrathin and continuous heat conduction silica gel layer is adhesively bonded on the back plane of the flat-plate absorber plate. By means of the technical scheme, the tube plate type core device is high in heat transfer property, no damage is caused to absorption films, bonding area is large and full contact is achieved, the flat-plate absorber plate is large in heat utilization area, and heat transfer is conducted evenly between tube plates.

The invention relates to a high-temperature solar energy receiver. The invention has a structure that heat absorbing sections of each neighboring different-shape high-temperature heat tube are connected two by two and equally arranged to form a heat absorbing cavity; the heat absorbing section of the different-shape high-temperature heat tube takes a shape of shuttle; a bushing is sleeved with a heating section of the different-shape high-temperature heat tube, and a work liquid inlet and a work liquid outlet are arranged on the bushing. The invention solves the defects that the heat absorbing efficiency is low and the use is limited, etc. The invention is provided with the different-shape high-temperature heat tube which is reconstructed on the basis of a column-shaped high-temperature heat tube as the heat absorbing and transmission component, with an easy manufacturing process and low manufacturing cost. Although the heat absorbing sections of each heat tube are mutually connected, the work is comparatively independent and a local failure has no impact on the whole receiver, with high reliability. The heat absorbing cavity is provided with the shuttle, triangle and ellipse, etc. parts which is suitable for receiving incidence light, and then the heat absorbing efficiency is enhanced. No clearance exists in the middle of the high-temperature heat tubes mutually connected in the heat absorbing section so as to prevent incidence light loss and enhance the efficiency of the whole receiver.

The invention provides a shell of an electric heater. The shell comprises a heating chamber, a circulating chamber, an inlet, an outlet, a first shell and a second shell. The heating chamber is used for accommodating PTC electric heating elements. The circulating chamber is used for accommodating medium and admitting flowing and passage of the medium. The second shell comprises connecting walls and partition walls. The heating chamber comprises a plurality of heat transfer channels partitioned by the partition walls. The circulating chamber comprises a plurality of circulating units. The first shell comprises a first side wall and a second side wall. The heat transfer channels with the first side wall or the second side wall form passages respectively. The circulating units are communicated with the passages. The circulating units of the shell of the electric heater are communicated through the passages to form the circulating chamber with a curved path; the medium flows through the circulating chamber in a circulating manner; flow path is long; the medium flows around the heat transfer channels; contact time is long, contact area is large, and heat absorption is highly efficient; accordingly, the heat efficiency of the electric heater with the shell is improved effectively, and the electric heater can be well used for heat supply, defrosting and demisting in electric vehicles.

The invention relates to a seawater desalination system driven by combination of solar energy and ocean thermal energy. The seawater desalination system comprises a heat source circulating loop, a power circulating loop, a cold source circulating loop and a seawater desalination loop. The power circulating loop comprises an organic turbine utilizing cycle working fluids to act. The heat source circulating loop comprises a warm water pump for pumping warm seawater. The output end of the warm water pump supplies the heat source for evaporating cycle working fluids through an evaporator. The cold source circulating loop comprises a cold water pump for pump cold seawater. The output end of the cold water pump the cold source for condensing the cycle working fluids through a condenser. The seawater desalination loop is a reverse osmosis desalination system which comprises a high-pressure pump and a reverse osmosis device. The power output end of the organic turbine is connected with the drive shaft of the high-pressure pump. Solar energy collectors are disposed in the heat source circulating loop or the power circulating loop. The solar energy collectors are connected between the warm water pump and the evaporator or between the evaporator and the organic turbine.

The invention discloses a generator of a diffusion absorption type refrigeration machine core, comprising an inner pipe, an outer pipe and a heating sleeve, wherein the outer pipe is formed by connecting two sections of pipes, i.e. a thick pipe and a thin pipe, wherein the thick pipe is provided with an opening; the heating sleeve is inserted into the opening, and the opening of the thick pipe ishermetically connected with the heating sleeve. The outer pipe of the generator is divided into two sections, one section is the thin pipe with the characteristics the same as an original outer pipe,and the other section is the relative shorter and thickened thick pipe, and the thick pipe is used for packaging the inner pipe and the heating sleeve and is hermetically connected with the thin pipeby gas welding; a heating sleeve pipe is arranged in the thick pipe and attached to the inner pipe; and heat emitted from an electric heating rod can intensively heat the inner pipe. Compared with theprior art, the invention reduces the heat flowing way towards the outer pipe, saves the heat energy, enhances the evaporation intensity of liquid ammonia and further shortens the starting time of a refrigeration system.

The invention relates to a vacuum collector tube with sealing heat pipe, belonging to solar heat utilization technology area. The collector tube comprises glass outer tube and heat pipe. Upper-middle part of heat pipe inserts in the central hole of metal flange plate and is welded in sealing. Cooling jacket with water inlet and outlet ports are welded at the upper in sealing. Kovar alloy ring is welded with glass outer pipe port in sealing round the metal flange plate. Vacuum cavity is formed between glass outer tube and hot tube. Protective cover for covering the sealing connection seam is set on the hot pipe. It is provided with simple structure and feasible producing process. All sealing connection seams can not be irradiated by sun light directly. So overhigh temperature can be avoided. Fitting suit between protective cover and glass outer pipe can take the effect of assistant support and over-collection of stress at the sealing welding seam is avoided. It is especially applied in middle-high large specification vacuum collector tube with sealing heat pipe.

The invention discloses an evaporator core comprising a core supporting frame. A liquid inlet pipe is arranged at the top end of one side of the core supporting frame, and a liquid outlet pipe is arranged at the bottom of the other side of the core supporting frame. A plurality of heat absorbing pipes are arranged in the middle of the core supporting frame, and a plurality of coil pipes are arranged on the outer side of the core supporting frame. Connecting sleeves are arranged at the two ends of the heat absorbing pipes, the ends of the coil pipes are connected with the ends, away from the heat absorbing pipes, of the connecting sleeves in an attached mode, and fins are arranged at the tops and the bottoms of the heat absorbing pipes correspondingly. The multiple heat absorbing pipes arearranged on the core supporting frame, and the fins arranged in a staggered mode are arranged on the heat absorbing pipes, and thus the heat absorbing efficiency of the evaporator core is improved. Movable heat exchanging pieces on the fins are connected with fixing rods through connecting rings, limiting sleeve pieces can be separated from limiting grooves through pressing rods, the movable heatexchanging pieces can be pulled out of heat absorbing plates by moving the fixing rods, thus the areas of the fins are increased, and the heat absorbing efficiency of the evaporator core is improved.The evaporator core is reasonable in structure, simple, practical and good in practicability.

The invention provides a novel heat absorber of a tower-type photo-thermal power station. The heat absorber is composed of a plurality of heat absorption units. Each heat absorption unit comprises a first heat absorption tube panel, headers connected to the two ends of the first heat absorption tube panel respectively and a second heat absorption tube panel on one side of the first heat absorption tube panel, wherein the two ends of the second heat absorption tube panel are connected with the headers at the two ends. The tower-type heat absorber suitable for the large tower-type power station has the advantages that the heat absorption efficiency of the heat absorber can be significantly improved, the reflectivity of light and the emissivity of a heat tower can be reduced, and the unit heat load of the tower can be reduced; because slag coagulating tubes can receive reflected light and emitted heat of the bottom tube panels on the light perpendicular incidence back face, the tube utilization rate can be increased, and heat efficiency can be improved; besides, because emitted light of the heat absorber tube panels is reduced, the light brightness of the heat absorption panels can be reduced, the blackness coefficient of the heat absorption panels can be increased, and light pollution can be reduced.