817 results about "Cold side" patented technology

A gas turbine engine is provided, having: a bifurcation; and a turbomachine further including a cooled cooling air (CCA) system, the CCA system having: a cold side bleed assembly defining an inlet positioned to be in fluid communication with an airflow over the bifurcation; a CCA heat exchanger in thermal communication with the cold side bleed assembly downstream of the inlet of the cold side bleed assembly; and a hot side bleed assembly defining an inlet in fluid communication with a working gas flowpath through a compressor section, at a compressor discharge cavity, or both, the hot side bleed assembly in thermal communication with the CCA heat exchanger to cool an airflow through the hot side bleed assembly, the hot side bleed assembly further in thermal communication with a hot component of the turbomachine to cool the hot component of the turbomachine.

The invention discloses a wind power-photovoltaic-photo-thermal cold power co-production system integrating heat pump energy storage and suitable for a large energy base, and belongs to the technical field of energy storage. A hot side outlet of a steam generator of the system is connected with an inlet of a second molten salt tank through a fourth molten salt pump, an outlet of the second molten salt tank is connected with an inlet of a first three-way valve through a second molten salt pump, and a first outlet of the first three-way valve is connected with an inlet of a heat collection tower. An outlet of the heat collecting tower is connected with a first inlet of a second three-way valve through a first molten salt pump; an outlet of the second three-way valve is connected with an inlet of a first molten salt tank; the compressor is connected with a hot-side inlet of the first heat exchanger, a hot-side outlet of the first heat exchanger is connected with an inlet of the turbine through a hot side of the second heat exchanger, and an outlet of the turbine is connected with an inlet of the compressor sequentially through a hot side of the third heat exchanger and a cold side of the second heat exchanger. According to the system, cold energy can be supplied to the outside through the heat pump energy storage system in the energy storage stage, cold and power cogeneration is achieved, and the comprehensive energy efficiency of the large energy base is improved.

The invention discloses a double-fluid topological optimization construction method and system for a printed circuit board heat exchanger, and the method comprises the steps: building a periodic boundary condition and a symmetric boundary condition of the printed circuit board heat exchanger based on the periodicity and symmetry of the height direction and the vertical flowing direction of the printed circuit board heat exchanger and the known full-scale model of the printed circuit board heat exchanger; selecting a typical flow channel unit of the three-dimensional printed circuit board type heat exchanger, and constructing a three-dimensional single flow channel model; then, according to the three-dimensional single-flow-channel model, a topological optimization material characterization method of a coupling variable density method and a three-dimensional flow heat transfer control equation, dimensionality reduction is conducted on the three-dimensional flow heat transfer problem to a two-dimensional design domain, and a two-fluid flow heat transfer dimensionality reduction model is formed; and finally, according to the two-fluid flow heat transfer dimension reduction model, coupling a variable density method topological optimization objective function and a filtering projection post-processing method, obtaining distribution of solid fins and fluid flow channels in the cold side fluid flow channel and the hot side fluid flow channel, namely a two-fluid topological optimization model. According to the method, topological optimization is carried out with heat exchange enhancement and flow resistance reduction as targets on the basis of the method, distribution of fluid fins in a design domain is obtained, a novel topological channel structure is constructed, and the performance of the printed circuit board type heat exchanger is improved; compared with a traditional structure, the total heat exchange amount can be increased by 13.1% under the condition that the pump work of the heat exchanger is reduced by 38%.

The gradually-expanded printed circuit board type heat exchange inner core comprises a cover plate, a bottom plate, a cold side plate layer and a hot side plate layer, a cold side gradually-expanded channel is of a flow channel structure with the width gradually expanded, and the sectional area of a flow channel dynamically adapts to gas-liquid phase change and volume change. And pressure drop fluctuation and bubble aggregation caused by gas phase expansion are reduced, the shunt channels and the divergent channels are arranged in parallel, an inner wall porous structure is combined, medium distribution uniformity is optimized through graded distribution and surface wettability enhancement, and the flow stability is remarkably improved. The turbulent flow ribs are arranged in the heat exchange channel on the heat side, combination of heterogeneous working media such as supercritical CO2-water and liquid hydrogen-liquid oxygen is supported by destroying a heat boundary layer, inducing turbulent flow and strengthening convective heat exchange and phase change heat transfer, the heat exchanger can improve the heat exchange efficiency while reducing pressure drop, compactness, reliability and wide working condition adaptability are considered, and the heat exchange efficiency is improved. Two-phase flow optimization and efficient heat exchange are achieved, and the extreme heat exchange requirements in the fields of aerospace, new energy and the like are met.

The invention relates to the technical field of plate heat exchange, in particular to a calculation method of a plate heat exchanger, which comprises the following steps: S1, converting pressure and temperature data into pressure and enthalpy values, setting boundary conditions, determining a hot side and a cold side of the heat exchanger according to the boundary conditions, and setting non-boundary values by segmentally applying energy conservation to obtain geometric parameters and empirical constants; s2, obtaining physical property parameters of the fluid by using a two-dimensional grid linear interpolation method, and obtaining the physical property parameters of the fluid by taking the enthalpy value and the pressure as coordinates; and S3, determining the effective area required by each section, and obtaining a local heat transfer coefficient and a pressure drop when the volume requirement is met under the fluid physical property parameters and the channel flow velocity. According to the method, the problem that the calculation speed of a calculation program is low when the performance of the brazing sheet heat exchanger is evaluated under different working conditions is solved through unique grid division in the plate heat exchanger and rapid calling of fluid physical properties, the calculation error value is effectively reduced, an accurate check result is obtained within ten iteration steps, and the calculation cost is saved.

The invention provides an intelligent control system and method for a natural cooling heat exchange ventilation unit, and relates to the technical field of energy-saving fans. The optimal operation mode and the natural cooling availability of a target ventilation unit are determined firstly; the expected heat exchange amount of the natural cold side is determined according to the current indoor heat load demand characteristics and the natural cold available capacity, and then a static adjusting instruction of a natural cold side actuator is determined according to the expected heat exchange amount; according to the heat load demand characteristics and the expected heat exchange amount, the mechanical refrigeration demand cold capacity is determined, and then a dynamic adjusting instruction of a mechanical refrigeration side actuator is determined according to the heat exchange efficiency and the mechanical refrigeration demand cold capacity of the mechanical refrigeration unit under the current working condition; and performing coordination control on the actuators on the natural cooling side and the mechanical refrigeration side based on the static adjustment instruction and the dynamic adjustment instruction. According to the scheme, dynamic cooperative control over natural cooling and mechanical cooling of the natural cooling heat exchange ventilation unit under the variable working conditions can be achieved, and therefore the energy efficiency is optimized on the premise that the requirement for indoor thermal comfort is met.

The invention discloses a decoupling control system and method for a supercritical carbon dioxide direct circulation nuclear power plant. A compressor inlet temperature constant control strategy and a compressor inlet pressure constant control strategy are adopted. A compressor inlet temperature control system adjusts the opening degree of a cooler cold side valve, and a compressor inlet pressure control system adjusts the working medium filling and discharging of a capacity box. In order to guarantee the power supply quality, a transmission shaft rotating speed constant control strategy is adopted, and transmission shaft auxiliary torque is adjusted through a transmission shaft rotating speed control system. In order to ensure the system efficiency, a reactor core outlet temperature constant control strategy is adopted, and a reactor core outlet temperature control system is used for adjusting the opening degree of a control valve; in order to achieve the reactor following operation target, a reactor core power matching demand power control strategy is adopted, the control rod speed is adjusted through a power control system, and based on the neuron PID decoupling control technology, the control target that each output parameter in the system is only influenced by a certain specific input parameter is achieved.

Thermal barrier assemblies are provided for inhibiting the transfer of thermal energy inside a traction battery pack. An exemplary thermal barrier assembly may include a heat spreader fin arranged within a cell stack and configured to provide a path for directing thermal energy into an enclosure structure rather than through the thermal barrier assembly to a cold side of the cell stack. The heat spreader fin may extend to a location that is either between an insulating layer of the thermal barrier assembly and the enclosure structure or between a grouping of battery cells of the cell stack and the enclosure structure.

The invention discloses a two-section compression type transcritical carbon dioxide heat pump system and a control method thereof. An outlet of a second compressor sequentially passes through a high-temperature heat exchanger and a flow divider and then is divided into two paths; wherein one path is communicated with an inlet of a first expansion machine through a heat flow stream inlet valve of the first heat regenerator, the hot side of the first heat regenerator and the hot side of the second heat regenerator, and the other path is communicated with an inlet of a second expansion machine through a heat flow stream inlet valve of the third heat regenerator and the hot side of the third heat regenerator in sequence; the outlet of the second expansion machine is communicated with the inlet of the mixer through the cold side of the second heat regenerator, the cold stream inlet valve of the first heat regenerator and the cold side of the second heat regenerator in sequence; an outlet of the first expansion machine communicates with an inlet of the mixer through the low-temperature heat exchanger, a cold stream inlet valve of the third heat regenerator, the cold side of the third heat regenerator and the first compressor, an outlet of the mixer communicates with an inlet of the second compressor, and the comprehensive energy efficiency of the carbon dioxide heat pump system can be improved.

In one aspect, a heat transfer apparatus including a process fluid heat exchange circuit having a mechanical cooler with hot and cold side heat exchangers and a hybrid cooler to receive process fluid from the hot side heat exchanger and provide cooled process fluid to the cold side heat exchanger. The hybrid cooler includes direct and indirect heat exchangers. The hybrid cooler has a dry mode and a hybrid mode. The heat transfer apparatus includes a controller configured to operate the process fluid heat exchange circuit in one of a plurality of modes based at least in part upon a determination of a thermal duty of the heat transfer apparatus.

The invention relates to a thermal power peak-shaving and frequency-regulating system with heat storage, a thermal power unit and a control method thereof, comprising: a steam storage tank; a low-temperature and high-temperature molten salt tank; a first and a second molten salt heat exchanger and valves; an inlet of the steam storage tank is connected to a hot side outlet of the second molten salt heat exchanger and is externally connected to a steam extraction pipeline of a medium and low pressure cylinder; a hot side inlet of the second molten salt heat exchanger is externally connected to a new steam pipeline of a high pressure cylinder inlet and a reheated steam pipeline of a medium and low pressure cylinder inlet; a cold side inlet and an outlet of the second molten salt heat exchanger are respectively connected to a low-temperature molten salt tank outlet and a high-temperature molten salt tank inlet; an outlet of the steam storage tank is connected to a cold side inlet of a first molten salt heat exchanger; a cold side outlet of the first molten salt heat exchanger is externally connected to a medium and low pressure cylinder; a hot side inlet and an outlet of the first molten salt heat exchanger are respectively connected to a high-temperature molten salt tank outlet and a low-temperature molten salt tank inlet; and by controlling the valves, the first and second molten salt heat exchangers are controlled to operate separately in the heat release and heat storage process to achieve the purpose of peak-shaving and frequency regulation.

The invention relates to the technical field of heat dissipation of energy storage battery cabins, and provides a liquid cooling type energy storage battery cabin anti-condensation system, which comprises an energy storage battery cabin in which a plurality of energy storage batteries are arranged; the liquid cooling pipeline structure is arranged on the periphery of the energy storage battery; and the plurality of condensate water collectors are respectively connected with the liquid cooling pipeline structure, a cold plate in the condensate water collectors is refrigerated through a liquid cooling machine to form a cold surface, and the condensate water is collected on the surface of the cold plate and then is discharged out of the energy storage battery cabin through a drain pipe. According to the invention, the plurality of condensate water collectors are added on the liquid cooling pipeline, when the humidity in the battery compartment is too high, the liquid cooling machine is started for refrigeration, the low-temperature effect generated during refrigeration of the liquid cooling machine is utilized, water vapor in the air is condensed through the condensate water collectors, condensation is actively formed and collected and converged, and the condensed water is discharged out of the compartment along the condensation and convergence pipeline; the purposes of actively reducing the air humidity in the battery cabin and preventing condensation are achieved.

The invention provides a vacuumizing system and a cold trap thereof. The cold trap comprises an inner container, a first shell and a second shell which are sequentially arranged at intervals from inside to outside. A storage cavity used for containing a low-temperature medium is formed in the inner container in a hollow mode. The outer side face of the inner container forms a first cold face. The inner side face of the first shell and the outer side face of the inner container are enclosed to form a gas flow interlayer for gas to flow. The first shell is provided with an air inlet and an air outlet which are communicated with the airflow interlayer. A containing cavity is defined by the inner side face of the second shell and the outer side face of the first shell, the containing cavity is used for containing a low-temperature medium, and a second cold face is formed by the inner side face of the first shell. The first cold surface and the second cold surface are formed in the cold trap at the same time, so that the cold surface area of the cold trap is increased, the temperature difference between the inner side and the outer side of the airflow interlayer can be balanced, the guiding effect of the cold trap on the gas is enhanced, the adsorption and trapping capacity of the cold trap on impurity gas molecules in the gas is enhanced, and therefore the efficiency of the cold trap is improved.

The invention relates to an open type carbon dioxide energy storage system and a carbon dioxide energy storage method. The open type carbon dioxide energy storage system comprises a gas compression device, a first expansion unit, a gas-liquid separation tank, a main cooler, a circulating compressor unit, a liquid storage tank, a regenerator and an energy release device. An inlet of the gas compression device is used for being communicated with an air discharging outlet of a coal chemical device, and an outlet of the gas compression device is communicated with an inlet of the first expansion unit and a hot side inlet of the main cooler. A hot side outlet of the main cooler is communicated with an inlet of the liquid storage tank; an outlet of the first expansion unit communicates with an inlet of the gas-liquid separation tank, and a gas outlet of the gas-liquid separation tank communicates with a cold side inlet of the main cooler. A cold side outlet of the main cooler communicates with an inlet of the circulating compressor unit, and an outlet of the circulating compressor unit communicates with an inlet of the gas compression device. The system and the method disclosed by the invention have relatively high energy storage efficiency and energy utilization rate.

The invention discloses a thermal performance simulation method and device for a printed circuit board heat exchanger and a medium. The method comprises the steps that a dynamic physical property calling method is established to form a dynamic link library; a three-dimensional distribution parameter model is established according to the structural size of the printed circuit board heat exchanger, and a three-dimensional array C [I] [J] [K] is used for representing all control units of the heat exchanger; establishing a flow direction description matrix of the cold side working medium and the hot side working medium in the printed circuit board heat exchanger control unit; based on the dynamic link library and the flow direction description matrix, respectively establishing control equations of cold and hot side working media of each control unit C (i, j, k); and establishing a simulation iterative algorithm of the printed circuit board heat exchanger to carry out iterative solution on the control equations of the cold and hot side working media of all the control units C (i, j, k), and when a convergence condition is met, ending thermal performance simulation and outputting a simulation result.

The invention discloses a gas turbine TCA / FGH large temperature difference driven S-CO2 power cycle system which comprises a gas compressor, a combustion chamber, a gas turbine, a TCA heat exchanger, an FGH heat exchanger, an S-CO2 compressor and an S-CO2 turbine, a hot side inlet and outlet of the TCA heat exchanger is connected with a hot air pipeline, the cold side of the TCA heat exchanger is connected with an S-CO2 working medium circulating device, the hot side of the FGH heat exchanger is connected with the S-CO2 working medium circulating device, and the hot side of the FGH heat exchanger is connected with the S-CO2 working medium circulating device. The cold side of the TCA heat exchanger is connected with a cold natural gas pipeline, the hot side of the TCA heat exchanger absorbs heat of high-temperature air, the air temperature is reduced to a set value, meanwhile, supercritical carbon dioxide after pressure boosting is heated, an S-CO2 turbine is pushed to do work, and natural gas is heated to the set temperature in the FGH heat exchanger. The TCA / FGH temperature difference condition is utilized, the S-CO2 power cycle is driven to output extra electric energy, the peak regulation capacity of the unit is improved, and meanwhile the problem of TCA / FGH heat imbalance is solved.

A gas turbine engine is provided. The gas turbine engine includes a stage of airfoil segments having a first ceramic matrix composite (CMC) airfoil segment, the first CMC airfoil segment includes: an end band having a radial surface defining a cold side surface area, ACS; and an airfoil coupled to or formed with the end band, the airfoil and the end band defining a joint therebetween, the joint including one or more radial interfaces defining a total radial interface surface area, ARI, and one or more axial interfaces defining a total axial interface surface area, AAI. The first CMC airfoil segment defines a first ratio of the cold side surface area, ACS, to the total axial interface surface area, AAI, and a second ratio of the total axial interface surface area, AAI to the total radial interface surface area, ARI.

The utility model relates to the technical field of metallurgical equipment, and discloses an environment-friendly kiln for lithium ore smelting, which comprises a kiln and a waste gas treatment mechanism, the side wall of the kiln is provided with a waste gas outlet, the inside of the kiln is provided with a feed port, and one side of the waste gas outlet far away from the kiln is provided with a heat exchange mechanism. A waste gas pipeline and a smoke outlet are arranged on the two sides of the waste gas treatment mechanism respectively, the heat exchange mechanism comprises a heat exchange cavity, a cold side outlet and a cold side inlet are formed in the two sides of the heat exchange cavity respectively, and a plurality of spoilers are installed in the side, close to the heat exchange mechanism, of the waste gas outlet. In the utility model, the spoiler is arranged in front of the heat exchanger to prolong the retention time of waste gas and improve the heat exchange efficiency. Meanwhile, an alkaline solution is sprayed to neutralize acidic components, generated solid byproducts such as sodium sulfate and calcium sulfate can be recycled for building materials or chemical engineering after being separated from liquid, and the production cost is reduced.

The present application relates to a kind of heat pump rectification systems based on heat shock flash circulation lift heat exchange, including rectifying tower, lift membrane reboiler, first throttling valve and heat shock heater, the secondary steam outlet of rectifying tower is connected with the heating steam import of lift membrane reboiler, the discharge port of the bottom of rectifying tower is connected with the cold side flow channel import of heat shock heater, and the cold side flow channel export of heat shock heater is connected with the feed inlet of lift membrane reboiler by first throttling valve;The vapor-liquid mixture outlet of lift membrane reboiler is connected with the column still liquid reflux port of rectifying tower, and the steam condensate outlet of lift membrane reboiler is connected with condensate tank, and the liquid outlet of condensate tank is connected with the condensate reflux port of rectifying tower side wall.The present application is combined by heat shock pressurization energy storage and throttling flash kinetic energy release, provides independent and stable lift membrane kinetic energy for lift membrane heat exchange, so that the flow pattern in the tube of lift membrane reboiler directly enters the efficient annular flow stage, improves the industrial applicability of lift membrane heat exchange technology in heat pump rectification system.

The invention discloses a heat insulation tile with staggered cooling channels for a combustion chamber and a heat shield in the technical field of gas turbines. The heat insulation tile comprises a heat side wall and an outer edge connected with the periphery. The cold side wall is arranged on one side of the hot side wall and connected with the outer edge, and a cavity is defined by the hot side wall, the outer edge and the cold side wall; the multiple transverse cooling channels are longitudinally arranged on the cold face of the hot side wall at intervals, one end of each transverse cooling channel penetrates through the outer edge, the other end of each transverse cooling channel communicates with the cavity, and the flowing directions of cooling gas in every two adjacent transverse cooling channels are opposite; the multiple longitudinal cooling channels are transversely arranged in the hot side wall at intervals, one end of each longitudinal cooling channel penetrates through the outer edge, the other end of each longitudinal cooling channel communicates with the cavity, and the flowing directions of cooling gas in every two adjacent longitudinal cooling channels are opposite. The heat insulation tile has high cooling efficiency, all positions of the heat insulation tile can be evenly cooled, and the ablation phenomenon caused by too high local temperature is effectively prevented.

Refrigerant circuit of a combined refrigeration system and heat pump with integrated steam injection circuit, wherein a 3-way valve (2) is arranged as a distribution point in the refrigerant circuit after a compressor (1), and an outdoor condenser / gas cooler (3), a main internal heat exchanger (5) and a check valve (6) as well as a connection point (19) are arranged in a refrigeration system line, and an indoor condenser / gas cooler (4) and a check valve (6) are arranged in a heat pump line,after which the heat pump line is joined to the refrigeration system line at the connection point (19) and the condensed or cooled refrigerant is subsequently led via an expansion device vapor injection (7) via the cold side of a secondary internal heat exchanger (8) to a medium-pressure chiller (9) and subsequently via a direct steam injection connection (18) into the compressor (1) and / or the condensed or cooled refrigerant is led via the warm side of the secondary internal heat exchanger (8) to an evaporator (12) and / or to a low-pressure chiller (13) before the refrigerant vapor is led via a liquid separator suction side (14) and the main internal heat exchanger (5) on the cold side to the suction side of the compressor (1).

The invention relates to a semiconductor refrigeration module with a cold storage function and a control method. The technical problem that when an existing vehicle-mounted refrigerator operates independently, a compressor of a whole vehicle needs to be kept running at a low rotating speed for a long time is solved. Comprising a semiconductor chilling plate, a cold end heat exchange assembly is arranged on one side of the cold face of the semiconductor chilling plate, a plate heat exchanger is arranged on one side of the hot face of the semiconductor chilling plate, a cold storage heat exchanger and a phase change material packaging box are arranged on one side of the plate heat exchanger, and the phase change material packaging box is filled with a low-temperature phase change material. The plate heat exchanger and / or the phase change material packaging box are / is connected with a refrigerant circulation mechanism connected with a whole vehicle compressor refrigerating system. The refrigeration system has the advantages that when the whole vehicle compressor refrigeration system works, the low-temperature phase-change material is used for quickly storing cold energy, and the low-temperature phase-change material can be used for dissipating heat for the hot surface of the semiconductor refrigeration sheet after the whole vehicle compressor refrigeration system stops working, so that long-time low-speed operation of the whole vehicle compressor is avoided, and the service life of the whole vehicle compressor can be effectively prolonged.

The invention belongs to the technical field of digital twinborn simulation, and particularly relates to a supercritical carbon dioxide heat exchanger simulation model calibration method based on a mechanism model. Comprising the following steps: selecting calibration parameters and target parameters of a heat exchanger simulation model; forming a calibration data set and a test data set; calculating cold and hot side resistance correction coefficients and heat exchange correction coefficients under different cold and hot side inlet temperatures, pressures and flows; fitting a cold and hot side resistance coefficient relational expression and a cold and hot side heat exchange correction coefficient relational expression; heat exchanger simulation model calibration is completed; and the calibrated heat exchanger simulation model is used for twin operation. The method has the beneficial effects that the problems that the simulation precision of a heat exchanger simulation model is high only under a rated working condition and the simulation precision is not ideal under other working conditions can be solved, and the heat exchanger simulation model can simulate the flow heat transfer characteristics of the heat exchanger at high precision under a full-range working condition; and virtual-real synchronous high-precision twinning operation of the heat exchanger and a system where the heat exchanger is located is supported.

The utility model discloses a universal semiconductor water-cooling heat dissipation device, which comprises a circuit board and a chip arranged on the front surface of the circuit board, the circuit board is provided with a heat dissipation through hole, the back surface of the circuit board is provided with a heat conduction plate for heat conduction, and the front surface of the heat conduction plate is provided with a heat conduction block which passes through the heat dissipation through hole and is attached to the back surface of the chip. A semiconductor chilling plate is attached to the back face of the heat conduction plate, the front face of the semiconductor chilling plate is a cold face, the back face of the semiconductor chilling plate is a hot face, a water cooling head is attached to the back face of the semiconductor chilling plate, and the water cooling head is connected with a circulating water cooling system. The LED lamp has the advantages of being high in heat dissipation performance and heat dissipation efficiency.

The invention discloses a fuel cell stack temperature control system, and belongs to the technical field of fuel cells, the fuel cell stack temperature control system comprises an air processing assembly, a cooling circulation assembly and a flow adjusting device, the air processing assembly comprises an air compressor and an intercooler which are connected in sequence; external air is compressed by the air compressor, flows through the hot side of the intercooler, is conveyed to the cathode inlet and flows out from the cathode outlet; the cooling circulation assembly comprises a main loop arranged between the cooling liquid inlet and the cooling liquid outlet and a branch loop communicated with the main loop, a main water pump and a temperature control valve are arranged on the main loop, and cooling liquid is shunted from the main loop to the branch loop and flows back to the main loop through the cold side of the intercooler; the flow adjusting device is arranged on the main loop and / or the branch loop and used for adjusting the flow of cooling liquid flowing through the cold side of the intercooler. By integrating a collaborative operation mechanism of the air treatment assembly and the cooling circulation assembly and cooperating with the flow regulation device, high-precision dynamic regulation and control of the working temperature of the fuel cell stack are realized.

A cooling flow arrangement for a ceramic matrix composite (CMC) component of a turbine engine, wherein the CMC component includes a hot side configured for exposure to a hot gas path of the turbine engine and an opposing cold side. At least one cavity is provided in the CMC component, the at least one cavity having an entrance disposed on the cold side that is configured for receiving a cooling flow. A seal is disposed adjacent the at least one cavity and the cold side of the CMC component and is configured to provide a seal between the CMC component and an upstream turbine component. At least one hole extends through the seal and is positioned to provide the cooling flow to the at least one cavity of the CMC component.

The utility model discloses a compression condensing unit with waste heat recovery precooling, which comprises a compression type refrigerating system, an absorption type refrigerating system and a secondary refrigerant circulating system, and the absorption type refrigerating system comprises a waste heat generator, a second condenser, a second throttle valve, a second evaporator, an absorber and a solution pump. The secondary refrigerant circulating system comprises a secondary refrigerant loop and a heat exchanger, the hot side of the second evaporator and the cold side of the heat exchanger are connected in the secondary refrigerant loop, and the hot side of the heat exchanger is connected between the compressor and the first condenser; the second evaporator transmits cold energy into the compression type refrigerant system through a secondary refrigerant in the secondary refrigerant loop and the heat exchanger, and refrigerant steam before entering the first condenser is pre-cooled. Waste heat generated in industrial production is used for driving the absorption type refrigeration system, the condenser of the compression type refrigeration system is pre-cooled through cold energy provided by absorption type refrigeration, and the energy utilization rate is effectively increased.

The handpiece comprises an array of emitters, oriented to emit optical energy toward a region of epidermis to be treated. The handpiece further comprises a transparent element positioned in front of the array of emitters and through which, during use, optical energy emitted by the array of emitters and optical energy backscattered from the epidermis pass. A cooling device is adapted to remove heat from the region of epidermis during use. The cooling device comprises at least one cooling plate and a thermoelectric device, with a hot side and a cold side, interposed between the cooling plate and the transparent element.

The utility model discloses a three-pass heat exchanger structure, belongs to the technical field of heat exchangers, and solves the technical problem of insufficient heat exchange of the conventional heat exchanger. The heat exchanger comprises a shell, a plurality of heat conduction pipes are arranged in the shell, gaps between the shell and the heat conduction pipes are hot side medium flowing areas, and the two ends of the shell are provided with flow dividing ribs which divide the heat conduction pipes into a first heat exchange area, a second heat exchange area and a third heat exchange area respectively. One end of the shell is provided with a cold side medium inlet communicated with the first heat exchange area and a hot side medium inlet communicated with the hot side medium flowing area, and the second heat exchange area and the third heat exchange area at the end are communicated; the other end of the shell is provided with a first cold side medium outlet communicating with the first heat exchange area, a cold side medium return opening communicating with the second heat exchange area, a second cold side medium outlet communicating with the third heat exchange area and a hot side medium outlet communicating with the hot side medium flowing area. The heat exchanger is compact in structure and capable of improving the heat exchange rate.

The invention discloses a vibration plate type anti-scaling MVR evaporator, and relates to the technical field of MVR evaporators. Comprising a compressor, a heater, a separator, a circulating pump and a heat exchanger which are connected with one another, the side end face of the heat exchanger fixedly communicates with a cold side inlet pipe and a hot side inlet pipe, the cold side inlet pipe is located on one side of the hot side inlet pipe, and an L-shaped fixed plate is fixedly installed on the side end face of the heat exchanger and located on the outer side of the cold side inlet pipe; an intercepting assembly is arranged on the L-shaped fixed plate; a mounting fixed plate and a stabilizing transverse plate are fixedly mounted on the heat exchanger, an auxiliary assembly is arranged on the mounting fixed plate and the stabilizing transverse plate, and a vibration transmission plate is arranged on the auxiliary assembly. Through cooperative use of the interception assembly and the auxiliary assembly, the anti-scaling capacity of the MVR evaporator is effectively improved, the heat exchange efficiency is improved, the service life of equipment is prolonged, energy consumption is reduced, and the use effect of the MVR evaporator is greatly improved.