47results about How to "Improve cold storage efficiency" patented technology

The invention provides an active and passive combined annual phase-change energy storage room capable of being used all year around, wherein the energy storage room aims to enable a building applying phase-change materials to operate in an energy-saving mode, enable the wall body of the building to adjust the air in a room all year around and extract natural cooling capacity actively, improve the storage and efficiency, heat storage and discharge and heat storage efficiency and cooling efficiency of a phase-change wall board and improve the air quality in the room and the indoor comfort. The active and passive combined annual phase-change energy storage room capable of being used all year around comprises a roof lighting room body, a phase-change combined wall body, a water system and a ventilation system. The roof lighting room body comprises a wall body with the four light-proof faces and a light-transmitting roof for collecting light. The phase-change combined wall body comprises the phase-change wall board, mortar made of phase-change materials, a capillary network, a glass cover plate, an air flue and air inlet. The water system comprises a water cooling and heating device, a water storage device and a tail end device. The ventilation system comprises an air supply device, the air flue, the air opening and a corresponding sealing device. By means of the scheme, great significance is provided for increase of the utilization rate of new resources and the phase-change materials in the building.

The invention relates to a novel liquid air energy storage system using phase change energy storage. The novel liquid air energy storage system has two working states including energy storage and energy releasing; in the energy storage process, a compressor unit is driven by a driving unit, and is sequentially connected with a heat accumulator set, a regenerator, a liquid expansion machine, a gas-liquid separator and a liquid air storage tank; and in the energy releasing process, a cryogenic pump is sequentially connected with the regenerator, a vaporizer, the heat accumulator set and a main expansion machine set, the main expansion machine set drives a power generator, the cryogenic pump is connected with the liquid air storage tank, winding pipe type heat exchangers are adopted in the heat accumulator set and the regenerator, a phase change heat storage material is contained in a shell pass, and an intermediate medium vaporizer is adopted as the vaporizer. According to the novel liquid air energy storage system, the winding pipe type heat exchangers and the intermediate medium vaporizer are applied to the liquid air energy storage system, air is led into a pipe pass to exchange heat with the phase change heat storage material and a phase change cold storage material in the shell side, compressed heat and liquid air cold are stored by the phase change heat storage material and the phase change cold storage material correspondingly, circulated utilization of the heat and the cold is guaranteed, and the efficiency of the system is improved.

The invention provides a composition, a preparation method of a heat transfer medium, a phase-change refrigeration method of hydrate and a phase-change refrigeration system of the hydrate. The composition contains carbon dioxide and a refrigeration working medium; the refrigeration working medium contains water, an oil-based carrying solution, a hydrate accelerant and a slurry stabilizing agent, wherein the carbon dioxide is dissolved into water; the hydrate accelerant and the slurry stabilizing agent are dissolved into the oil-based carrying solution and/or the water. The composition providedby the invention has the advantages that continuous cold source supply of the nature is sufficiently utilized, properties of a hydrate generation manner of simplicity and high refrigeration and coldenergy accumulation are utilized and characteristics of low additional energy consumption, energy saving and environment protection, low operation cost and safety and reliability are utilized to simultaneously overcome the problem of cold energy utilization of seawater and underground water water-source heat pump in the prior art and the problem of pipeline blocking caused by hydrate agglomerationand sedimentation in a hydrate phase-change refrigeration cycle. The invention provides an effective way for realizing efficient and reasonable utilization of energy and actual utilization of hydratephase-change refrigeration, and has extremely great economic and social values.

The invention discloses a method for boosting crystallization of a phase-change cold-storing material of a eutectic salt solution. The method comprises the following steps: mixing 100 parts of eutectic salt solution with a mass concentration of 10-26.4% with 0.1-1.2 parts of magnetic metal nanometer particles or magnetic metal oxide nanometer particles, and then adding 0.2-0.6 parts of surface dispersing agent, and ultrasonically treating for more than 30 minutes, thereby obtaining a suspended low-temperature phase-change cold-storing material of the eutectic salt solution. An electromagnetic coil is uniformly wound on an outer wall around a cold-storing tank; a direct current is introduced; the direction of a generated magnetic field is opposite to the direction of gravity; and the strength of the magnetic field is adjusted by changing the size of a voltage. According to the method provided by the invention, the magnetic nanometer particles and the magnetic field effect are utilized to strengthen the heat-transfer characteristic of the traditional cold-storing material of the eutectic salt solution, the nucleating condensate depression is improved, the crystallizing time is shortened, the cold-storing efficiency is increased, and meanwhile, the volume of a heat exchanger is reduced.

Disclosed therein is an air conditioner for a vehicle, which includes an evaporator and a storage tank getting in surface contact with each other, thereby doubling a cold storage effect by directly transferring cold air of the evaporator to the storage tank in a cooling mode, maximizing the cold storage effect because condensate water generated from the surface of the evaporator additionally cools the surface of the storage tank, and effectively enhancing heat-exchanging performance without increasing capacity of the storage tank. The air conditioner further includes heat-exchanging means mounted inside the storage tank so as to enhance the heat exchange performance of a heat carrier more.

To provide air-conditioning system which can air-condition a room with low electric power regardless of day or night by cooling outside air by using natural energy and efficiently storing the coldness in a thermal storage material while cooling the room with the cooled outside air and whose construction cost is low. Air-conditioning system utilizing natural energy is characterized by comprising a thermal storage chamber (27) formed under the floor; an intake air storage section (4) provided adjacently to the thermal storage chamber (27); an intake pipe (5) connected to the intake air storage section (4) and adapted for sucking outside air; an outside air cooling mechanism for cooling the outside air sucked through the intake pipe by using natural energy; an outside air supply pipe (7) for introducing the outside air cooled by the outside air cooling mechanism into the thermal storage chamber (27); a blower (8) for feeding the outside air cooled by the outside air cooling mechanism into the outside air supply pipe (7); and thermal storage material (6) housed in the thermal storage chamber and adapted for storing or releasing the coldness, and characterized in that the average particle diameter of the thermal storage material (6) is largeras the depth from a bottom surface (7a) of the thermal storage chamber (27) to a floor surface (20) is greater.

The invention relates to the field of low temperature liquid air energy storage, in particular to a low temperature cold storage system and method. The low temperature cold storage system comprises a cold release heat exchanger, a cold storage heat exchanger, a fluid work medium storage device and a solid phase medium cold accumulator; solid phase media used for cold accumulation are contained in the solid phase medium cold accumulator; fluid work media used for heat exchange are contained in the fluid work medium storage device; the fluid work medium storage device, the solid phase medium cold accumulator and the cold release heat exchanger are sequentially connected through pipelines, and a cold release circulating channel is formed; and the solid phase medium cold accumulator, the fluid work medium storage device and the cold storage heat exchanger are sequentially connected through pipelines, and a cold storage circulating channel is formed. According to the low temperature cold storage system and method, the solid phase media are adopted for cold storage, the fluid work media are adopted as heat exchange media, the large temperature difference problem that air and cold storage media directly exchange heat at the initial stage is solved, the cold accumulation efficiency is improved, and the system cost is reduced.

The invention relates to a high-efficiency cold storage agent for a fresh cold chain, comprising the following components in percentage by weight: 0.1 to 3% of sodium carboxymethyl cellulose, 0.1 to 3% of anti-undercooling agent, 0.1 to 26% of energy storage agent, and the balance water. In the invention, the non-toxic, harmless and convenient inorganic salt is taken as a main component, an anti-undercooling agent is added to reduce the degree of undercooling, and also a phase separation preventing agent is added to stabilize the cold storage performance, thereby improving the cold storage efficiency and further reducing the use cost. The phase transition temperature of the obtained cold chain low-temperature cold storage agent is 0 DEG C or below, the cold storage agent has the advantagesof energy saving, safety and high efficiency, and can meet the temperature requirement of temperature-sensitive agricultural product cold chain logistics.

The invention relates to the technical field of cold accumulation equipment, in particular to a combined type regenerator and a liquid air energy storage system. The combined type regenerator comprises a first connecting main pipe, a second connecting main pipe and a plurality of cold accumulation tanks, all the cold accumulation tanks are separately connected with the first connecting main pipe through first connecting branch pipes, all the cold accumulation tanks are separately connected with the second connecting main pipe through second connecting branch pipes, all the cold accumulation tanks are connected in series through third connecting branch pipes, first control valves are separately arranged on positions, between every two adjacent first connecting branch pipes, of the first connecting main pipe, second control valves are separately arranged on the position, between every two adjacent second connecting branch pipes, of the second connecting main pipe, and third control valves are separately arranged on each third connecting branch pipe. According to the combined type regenerator and the liquid air energy storage system, independent or combined control can be carried outon each cold accumulation tank, modular flexible regulation and control on each cold accumulation tank are realized, different operation modes of series connection, parallel connection or series-parallel connection combination among the cold accumulation tanks can be realized, and the cold accumulation efficiency is improved.

The invention provides a liquefied air energy storage system adopting liquefied natural gas for cold storage. The liquefied air energy storage system comprises the liquefied air energy storage system, a natural gas pipeline network, a condensation evaporator, a liquefied natural gas expansion machine, a liquefied natural gas storage tank, a liquefied natural gas booster pump and a liquid air energy release power generation system, wherein the liquefied air energy storage system is used for converting air in the atmosphere into liquid air and recycling cold energy generated when the liquid air is gasified; a natural gas pipeline network; the condensation evaporator is used for exchanging heat in the liquid air gasification process and the high-pressure gaseous natural gas liquefaction process; the liquefied natural gas expansion machine is used for expanding the high-pressure liquefied natural gas from the condensation evaporator to low pressure and doing work to recover pressure energy; a liquefied natural gas storage tank; the liquefied natural gas booster pump is used for enabling the boosted liquefied natural gas to enter the liquefied air energy storage system and recycling the cold energy generated when the liquid air is gasified; and the liquid air energy release power generation system is used for heating the gaseous compressed air from the condensation evaporator and utilizing compressed air expansion to do work to generate power. The invention further provides a liquefied air energy storage method adopting the liquefied natural gas for cold storage.

The invention relates to a high-temperature phase-change cold storage device, and belongs to the technical field of phase-change cold storage. When a refrigerator works, a solenoid valve is switched off, a cooling agent evaporates in a shell-tube evaporator and absorbs heat to take away surrounding heat, and then refrigerating is achieved; and cooling agent gas generated after evaporation enters acompressor to be compressed, then condensed in a condenser and enters the shell-tube evaporator to achieve refrigerating after being dried and filtered through a drying and filtering device, and a cycle is formed. When the cold storage device works, the solenoid valve is switched on, a refrigerating agent enters an ice making device through the shell-tube evaporator, a part of the refrigerating agent enters a cold storage tank through a reverse osmosis membrane under the action of the reverse osmosis membrane and generates phase change in the cold storage tank to form ice slurry, water heatedby a heater enters a heat exchange coil pipe arranged in the cold storage device to achieve heat exchange with the ice slurry in the cold storage tank, and then refrigerating is achieved.

The invention provides a cryogenic liquefied air energy storage system and method. The cryogenic liquefied air energy storage system comprises a compression device, a liquefying and storage device, apressurizing device, a gasifying device, a cold storage device and an expanding and power generation device; the compression device, the liquefying and storage device, the pressurizing device, the gasifying device and the expanding and power generation device are connected sequentially; the gasifying device is connected with the liquefying and storage device through the cold storage device; and the cold storage device comprises a heat insulation shell and multiple cold storage tanks, the multiple cold storage tanks are located inside the heat insulation shell, the cold storage device adopts the compact structure, the cold storage tanks are filled with cold storage media, thus the cold storage efficiency is increased, and the occupied area is small. According to the system and the method, only one heat insulation shell is arranged, so that the contact area of the cold storage device with the outside is greatly reduced, heat exchange of the cold storage device with the outside is reduced, the energy loss is reduced, and the storage time of high-quality cold energy is prolonged. The cold storage device of the system is high in storage capacity, high in cold storage quality, easy to manufacture and mount and relatively low in relative investment, so that the economy of the system can be improved.

The invention relates to a water energy storage system using a fire pool. The water energy storage system comprises air cooled heat pump cold and heat storage equipment and water cooled heat pump cold and heat storage equipment. The air cooled heat pump cold and heat storage equipment comprises the fire pool, an air cooled heat pump unit and a heat exchanger, the heat exchanger is arranged in the fire pool, and a first circulation loop is formed between the air cooled heat pump unit and the heat exchanger so as to cool fire water in the fire pool for cold storage or heat the fire water in the fire pool for heat storage. The water cooled heat pump cold and heat storage equipment comprises an energy storage tank, a water cooled heat pump unit and a cooling tower, and a second circulation loop is formed between the water cooled heat pump unit and the energy storage tank so as to cool water in the energy storage tank for cold storage or heat water in the energy storage tank for heat storage. A third circulation loop is formed between the water cooled heat pump unit and the fire pool, so that heat released by the fire water in the fire pool is used for heating the water in the energy storage tank for heat storage. A fourth circulation loop is formed between the water cooled heat pump unit and the cooling tower, so that cold released by cooling water in the cooling tower is used for cooling the water in the energy storage tank for cold storage. Therefore, the fire pool is used for carrying out cold storage and heat storage at the same time, and the cold and heat storage efficiency is high.

The invention provides a water-based phase-change cold storage device under microgravity, relates to the field of phase-change energy storage, and can be applied to a temperature control system in an extreme environment such as a spacecraft. A shell of the cold storage device is provided with a circulating liquid inlet and outlet, and a plurality of micro-pipes are closely arranged in the cold storage device and connected to the circulating liquid inlet and outlet. The peripheral space of a micro-pipe heat exchange section is sealed by a layer of elastic liquid bag, and the micro-pipes, the liquid bag and a cold storage medium sealed inside form multiple cold storage subunits with independent spaces. A layer of net rack is attached to the outer surface of the liquid bag, and the micro-pipes, the liquid bag and the net rack are kept in the coaxial positions and form a compact honeycomb structure. Throttling teeth are arranged at the two ends of the liquid bag and the two ends of the micro-pipes and mesh with each other to achieve the labyrinth sealing effect, and expansion joints of corrugated structures are arranged at the two ends of the micro-pipes. Micro fins are arranged in the sealing positions of the micro-pipes and the liquid bag. According to the water-based phase-change cold storage device under microgravity, the problems that a cold storage device is low in cold storage efficiency, prone to leakage and the like in the extreme environment can be effectively solved.