989 results about "Heat recirculation" patented technology

A high-efficiency heat cycle system including a compressor, a first turbine, first and second heat exchangers 7 and 8, a first pump, and an expander, and a composite heat cycle power generator using the high-efficiency heat cycle system. Working gas Fg compressed in the compressor (C) drives a first turbine (S) and is thereafter cooled by passing through a heat dissipating side of a first heat exchanger (7) and then raised in pressure by a first pump (P) to form high-pressure working liquid Fe, the high-pressure working liquid is expanded and evaporated in a expander (K) to form working gas Fg, said working gas Fg is heated by passing through a heat receiving side 82 of the second heat exchanger before being introduced into the compressor C. A heat dissipating side 81 of the second heat exchanger comprises a heat dissipating portion of a refrigerating machine or a heat dissipating portion for waste heat from a heating machine.

An active thermal energy storage system is disclosed which uses an energy storage material that is stable at atmospheric pressure and temperature and has a melting point higher than 32 degrees F. This energy storage material is held within a storage tank and used as an energy storage source, from which a heat transfer system (e.g., a heat pump) can draw to provide heating of residential or commercial buildings and associated hot water. The energy storage material may also accept waste heat from a conventional air conditioning loop, and may store such heat until needed. The system may be supplemented by a solar panel system that can be used to collect energy during daylight hours, storing the collected energy in the energy storage material. The stored energy may then be used during the evening hours to heat recirculation air for a building in which the system is installed.

An active thermal energy storage system is disclosed which uses an energy storage material that is stable at atmospheric pressure and temperature and has a melting point higher than 32 degrees F. This energy storage material is held within a storage tank and used as an energy storage source, from which a heat transfer system (e.g., a heat pump) can draw to provide heating of residential or commercial buildings and associated hot water. The energy storage material may also accept waste heat from a conventional air conditioning loop, and may store such heat until needed. The system may be supplemented by a solar panel system that can be used to collect energy during daylight hours, storing the collected energy in the energy storage material. The stored energy may then be used during the evening hours to heat recirculation air for a building in which the system is installed.

The invention provides a process and device for carrying out stage dry distillation on oil shale under the state of full recycle, with the gas as the heat carrier. The oil shale is divided into three different sizes (such as 0-6mm, 6-20mm and 20-50mm) through crushing and screening, and the oil shale is firstly dried and heated to the temperature between 50 DEG C and 150 DEG C by the waste smoke exhausted from gas heating furnaces and then enters into the different sizes of furnaces for dry distillation to undergo dry distillation. After being treated by water spraying and an indirect cooling tower, a rotary trapper and an electric trapper for oil collection, the dry distillation oil and gas undergo oil-gas-water separation, and after separation, the oil enters into a storage tank, the water enters into a circulating water tank and the first part of gases serves as the heat carrier and is recycled, the second part of gases is used as the fuels for the heating furnaces and the third part of gases is used as the fuel gases for power generation.

The invention discloses a coal-fired power plant flue gas heat regenerative system and an energy-saving water-saving ultra-clean discharging method. The temperature of the flue gas is reduced to about 90-110 DEG.C through a low-temperature coal economizer, and the recycled flue gas heat heats primary and secondary wind entering a boiler through a steam air heaters, so that the first stage of heat regenerative cycles is achieved. The temperature of the flue gas at the outlet of a desulfurization tower is reduced to 30-40 DEG.C through a vacuum flash evaporation and solidification device and a low-temperature heat pump heat exchange device, and a part of water vapor of the flue gas is condensed and collected, so that water is saved. The low-temperature heat pump heat exchange device absorbs the latent heat released in flue gas sensible heat and condensation processes, and dry as-fired coal and air are heated, so that the second stage of heat regenerative cycles is achieved. A boiler slag discharge system recycles the waste heat of heat slag, and the as-fired coal is heated, so that the third stage of heat regenerative cycles is achieved. When the waste heat is not used up, the remained waste heat can be utilized, so that energy is saved. Low-temperature desulphurization slurry led out from the vacuum flash evaporation and solidification device is injected into the desulfurization tower, so that the desulphurization efficiency is improved, and an ultra-clean discharging objective is achieved.

In a shelter comprising an enclosure for delimiting an air-conditionable enclosure interior and a container that is externally mounted to the enclosure and has a container space for receiving a cooling installation, a superior protection against detrimental exterior influences shall be provided so that a reliable and energy-efficient cooling of the enclosure interior is ensured.

To solve this problem it is suggested that the enclosure comprises at least one passage for heat recirculation from the enclosure interior to the container space.

The present invention relates to a power module in which an insulated circuit board is fixed to one main surface of a heat discharge plate. It is an object thereof to provide a power module in which the heat discharge characteristics are improved without any marked warping being generated, and that has an extended heat cycle longevity.

In the power module 10 of the present invention, a square insulated circuit board 12 is fixed to one main surface of a heat discharge plate 11. The heat discharge plate 11 is formed of an Al based alloy plate having a thickness A of 3 to 10 mm, and the insulated circuit board 12 having a side B of 30 mm or less in length is brazed directly onto the heat discharge plate 11. It is-preferable that the brazing material used is one or two or more brazing materials selected from Al—Si, Al—Ge, Al—Cu, Al—Mg, and Al—Mn based brazing materials. It is also preferable that the insulated circuit board 12 is formed by a ceramic substrate 12a and Al plates 12b and 12c that are bonded to both surfaces thereof, and that the Al plate 12b has a purity of 99.98 or greater percent by weight.

The invention discloses a heat pump compressed air energy storage system. The heat pump compressed air energy storage system comprises a heat pump high-temperature heating cycle loop and a compressedair energy storage and energy release loop. The heat pump compressed air energy storage system compresses the air into a high-pressure state through off-peak (low-price) electricity of a power station, stores air compression heat and produces and stores high-temperature heat through the heat pump high-temperature heating cycle loop. During the period of electricity consumption peak, the high-pressure compressed air absorbs the stored compression heat and the stored high-temperature heat energy in sequence and then is fed into an expansion machine to drive a power generator to generate electricity. The heat pump compressed air energy storage system provided by the invention has the advantages of being simple in structure, high in efficiency, strong in flexibility, suitable for peak regulation of a power grid and various types of renewable energy source power stations, free of generation of greenhouse gases and the like.

The invention discloses a razing method for DD5 single crystal alloy, and belongs to the technical field of brazing. The method is carried out according to the following steps of (1) cleaning a sample, (2) assembling the sample, (3) applying coating, (4) putting the sample with brazing filler metal applied into a constant temperature drying baker to be dried, and (5) carrying out vacuum brazing, putting the sample into a vacuum brazing furnace to carry out brazing, heating up to 500-550 DEG C with the speed of 5-20 DEG C/min, keeping the temperature for 10-30min, heating up to 1120-1160 DEG C with the speed of 5-20 DEG C/min, keeping the temperature for 10-30min, then heating up to 1200-1230 DEG C with the speed of 5-20 DEG C/min, keeping the temperature for 20-60min, carrying out furnace cooling to the temperature below 1000 DEG C, carrying out rapid cooling by charging 1-2 bar argon, and taking the sample out of the furnace after being cooled to the temperature below 80 DEG C. According to the razing method for the DD5 single crystal alloy, brazing connection of DD5 alloy turbine blades can be achieved, the strength of brazing connectors meets operating requirements, the average instant tensile strength of the DD5 alloy at the high temperature of 980 DEG C is 580 MPa after brazing heat circulation, compared with DD5 alloy technical conditions, the instant tensile strength is reduced by 17%, and the endurance property at the high temperature of 1093 DEG C meets requirements of technical conditions.

The invention relates to the fluid heater using a heat pump and a control method of the fluid heater, in particular, a primary heating type heat pump water heater with a temperature control switching function and a three-water tank double-loop circulation water heating structure. The primary heating type heat pump water heater includes a heat pump unit and three water tanks; the first water tank and the second water tank are connected with a condenser through a three-way valve and a circulating pump, so that a first heating circulating loop and a second heating circulating loop of which the switching is controlled by the three-way valve can be formed; cold water inlets of the first water tank and the second water tank are connected with a cold water incoming pipeline through a first electromagnetic valve and a second electromagnetic valve; and hot water outlets at the tops of the first water tank and the second water tank are connected with a hot water storage tank through a three-way constant temperature hot water pipe, so that a first constant temperature water outgoing channel and a second constant temperature water outgoing channel which are controlled by the first electromagnetic valve and the second electromagnetic valve can be formed. The temperature control-switched three-water tank double-loop circulation water heating structure is adopted to product hot water, and outgoing water temperature can achieve set temperature and is not affected by incoming water flow, and the stability and continuity of the heating of hot water can be ensured.

Disclosed is a cold energy recovery-type variable-capacity air-source heat pump system, relating to combined heating and refrigerating systems running in an alternating or synchronous manner, wherein a first subsystem and a second subsystem share a double-channel variable-capacity heat exchanger; a heat exchanger main body comprises two manually independent refrigerant pipe pass channels, and a refrigerant in the two channels synchronously carries out heat exchange with hot medium water in a shell pass channel; the shell pass channel establishes a water-medium heat-supplying circulation by means of a hot water circulation pipeline and a hot water circulation pump; the first subsystem and the second subsystem are connected to the two refrigerant pipe pass channels via a control valve group.

The invention relates to a mutually-cyclical solid fuel gasification device with double fluidized beds and a solid fuel gasification method. The method comprises the following steps: performing a pyrolysis gasification reaction between a solid fuel and a gas for fluidizations and reactions in a fluidized bed gasification reactor so as to generate a combustible gas, as well as solid coke and semicoke which are not subjected to incomplete pyrolysis gasification reaction, wherein the heat required by the pyrolysis reaction is obtained from high-temperature heat-carrying circulating bed materials; feeding the solid coke/the semicoke and the heat-carrying circulating bed materials with heat discharge into a pneumatic back-feeder through a cyclone separator or an overflow device according to a running state in the reactor; controllably sending the solid coke/the semicoke and the heat-carrying circulating bed materials into a combustion reactor; reheating the heat-carrying circulating bed materials due to the combustion of the solid coke/the semicoke in the combustion reactor; and refeeding the heated heat-carrying circulating bed materials into the gasification reactor through a back-feeding device so as to provide the heat for the pyrolysis gasification reaction. Thus, the device is gasified while the running parameters of the bubbling fluidization and the fast fluidization are adapted. As a result, the solid fuel gasification device provided by the invention has the good adaptability for various combustible solids; and the high running efficiency of the whole device is realized.

The invention discloses a method for indirectly promoting medium and low temperature solar heat energy grades, which comprises the following steps of: introducing medium and low temperature solar heat energy in chemical regenerative cycle, converting the solar heat energy into steam internal energy by means of steam evaporation latent heat, converting the steam internal energy into synthetic gas chemical energy by reforming reaction with the participation of steam to realize grade promotion, and finally implementing heat power conversion in a combustion gas turbine system. Because of the introduction of solar energy, turbine exhaust waste heat reclamation is improved, fossil energy consumption is reduced, meanwhile, steam yield is increased, and chemical regeneration and physical regeneration benefits are increased. The solar energy heat-to-power net efficiency can reach 25 to 30 percent; and compared with the conventional chemical regenerative cycle, the efficiency is improved by 5.7 percent, the fossil energy can be saved by 20 to 30 percent, and meanwhile, CO2 emission reduction is realized. Therefore, the method has good economic efficiency and broad engineering application prospect.

The invention discloses a sterilizing and drying box with a layered structure. The sterilizing and drying box comprises a box body and a thermal circulation device, the box body is provided with a hollow stainless steel cavity, a desk type baking car and a baking tray with a layered structure are arranged in the box body, the baking tray is arranged on the baking car, the thermal circulation device comprises a heater, an inner circulation fan, an air feeder and a convection wall fine-adjustment plate, the heater is fixedly arranged on the inner wall of the box body, the inner circulation fan and the air feeder are fixed to the outer side of the box body through flanges, the convection wall fine-adjustment plate is vertically and internally arranged on one side of the box body, an inlet of the convection wall fine-adjustment plate is communicated with air outlets of the inner circulation fan and the air feeder through pipelines, and an outlet of the convection wall fine-adjustment plate is communicated with the cavity of the box body. By the aid of the sterilizing and drying box, air class is rapidly increased, moisture is automatically removed, a user and a machine are bridged, full-automatic measurement and control are realized, and enterprise resources are saved.

The invention discloses application of a second type absorption type heat pump in a heat exchange system of a power plant. The key improvement is that a drive steam inlet of a generator is connected with a first stage steam extraction pipe arranged on a low pressure cylinder of a steam turbine through a pipeline, and a condensate water outlet is connected with a condensate water pipe returning to a boiler through a pipeline; a cooling water inlet of an absorber is connected with the condensate water pipe returning the boiler through a pipeline, and a cooling water outlet is connected with the condensate water pipe returning the boiler through a pipeline; a cooling water inlet of a condensator is connected with a cooling water inlet of a condensor through a pipeline, and a cooling water outlet of the condensator is connected with a cooling water outlet of the condensor through a pipeline; a cooled steam inlet of an evaporator is connected with the first stage steam extraction pipe arranged on the low pressure cylinder of the steam turbine through a pipeline, and a condensed water outlet of the evaporator is connected with the condensate water pipe returning the boiler through a pipeline. The invention has the advantages that the second type absorption type heat pump can reduce the amount of extracting middle-high pressure steam, enhance the energy conversion efficiency and save the resources.

The invention discloses a method and device for automatically optimizing electric-arc welding process parameters. The method comprises the following steps of: simulating welding heat-cycle curves of electric arc welding under different process parameters by utilizing a computer technology, carrying out superimposition with a continuous cooling structural transformation diagram of a welding base material, and predicating corresponding welding seams and the structure of a heat-affected zone till the requirement is met, so that the optimization of the electric-arc welding process parameters is automatically realized. Therefore, the method and device disclosed by the invention has the advantage that the full-scale testing times for obtaining excellent welding seam structures is greatly reduced.

A machine with baking channel for sticking film onto paper product and a method for sticking film by coating water adhesive are disclosed. The surface of BOPP film is treated before the water adhesive is coated onto it. The baking channel is reformed to become a sealed space with heat circulation, negative pressure and heat insulating function. The Cr plated rollers are reformed to have temp controllable and heat insulating function. A heat source with low energy consumption is used.

The invention relates to a solid electric heat accumulation device which comprises a thermal-insulation shell, a load-bearing wall, a resistance heater set, a heat accumulator, a thermal circulation system, a basic structure and a control system. The technical scheme is as follows: the resistance heater set directly powered by a power source is installed in each space established by the load-bearing wall in the thermal-insulation shell; the resistance heater set is formed by connecting a plurality of resistance heating units in series; the basic structure is composed of a cable trench, a load-bearing wall and a foundation; the heat accumulator is composed of a rectangular-solid assembly array; the rectangular-solid assembly is made of cast iron or refractory steel, the inside of which is provided with a heat accumulation material; and the thermal circulation system is a closed air duct formed by tightly connecting a circulating path, a heat exchanger, an air regulator and a fan component arranged on the external surface of the thermal-insulation shell, thereby completing the output of the heat energy to the heat user. Compared with the solid electric heat accumulation device manufactured by the prior art, the solid electric heat accumulation device provided by the invention can reduce the equipment volume, lowers the cost for electric heating components, and prevents the heat accumulator from being electrically charged.