728results about How to "Reduce heat exchange" patented technology

To reduce pressure loss on a heat-exchanger fluid while downsizing a heat exchange and reducing the production cost of the heat exchanger without impairment of the heat transfer performance of the heat exchanger by forming a fluid channel in surfaces of thin metal plates such as stainless steel plates through the use of an etching technique or the like and by improving the shape of the fluid channel. In a heat exchanger in which a plurality of heat exchanger fins are provided in thin metal plates by using an etching technique or the like and a fluid channel for a heat-exchanger fluid is formed between the two opposed thin metal plates by alternately stacking the thin metal plates, the area of the fluid channel, through which the fluid flows between the heat exchanger fins, is made substantially uniform by forming the heat exchanger fins so as to have a curved cross-sectional shape from the front end thereof to the rear end.

The invention provides a low-temperature refrigerating control method of an air conditioner and the air conditioner. By the adoption of the low-temperature refrigerating control method of the air conditioner and the air conditioner, the technical problem that an air conditioner cannot conduct refrigeration continuously under a low-temperature condition is solved. The control method comprises the following steps that when the air conditioner conducts refrigeration, the outdoor environment temperature is detected; whether the detected outdoor environment temperature is lower than a set temperature threshold value or not is judged; and if so, the operation frequency of a compressor of the air conditioner is lowered to be within a preset frequency range, and the superheat degree of the air conditioner is increased by preset degrees. According to the air conditioner adopting the control method, the effect that an indoor heat exchanger cannot enter a freeze protection mode at the low temperature is guaranteed, the indoor heat exchange capacity is improved, and then the refrigerating capacity is improved; in addition, continuous operation of the compressor is achieved, and the technical effect of continuous refrigeration is achieved at the low temperature.

The invention concerns an analysis device including at least one chip (110) equipped with a plurality of analysis electrodes (112). In accordance with the invention, the device also includes means of individual heating (150) of the analysis electrodes.The invention can be used for the analysis of chemical or biological products, for example in an antigen/antibody recognition or DNA/DNA analysis.

Temperature regulated clothing with a thermo-electric module that can be configured to transfer heat to or from the inside of the clothing. The clothing can include, e.g., a control system to maintain a desired internal clothing temperature. The clothing can have, e.g., a circulating coolant system to enhance the rate and/or efficiency of heat transfer.

The invention discloses a system and a method for adjusting environment of a portable data center. The system comprises a computer room, a plurality of computer cabinets, a blowing device, a control unit and a first sensor, wherein the computer room comprises a first opening and a second opening; the plurality of computer cabinets are accommodated in the computer room and generate a second air flow after heat exchange with the first air flow; the blowing device is arranged in the computer room and guides the first air flow towards the computer cabinets; the control unit controls the first andsecond openings of the computer room; the first sensor detects the first temperature of the outside air of the computer room and is electrically connected with the control unit; wherein the control unit controls the on and off of the first and second openings by comparing the first temperature with the second temperature. By the invention, the heat exchange amount of the heat exchanger can be reduced so as to reduce the electric energy consumption of the heat exchanger, avoid the waste of energy and save the operation cost.

A power plant system including a fossil fuel fired power plant (6) for the generation of electricity, a carbon dioxide capture and compression system (5, 13), and an external heat cycle system has at least one heat exchanger (1,2,3) for the heating of the flow medium of the external heat cycle system. The heat exchanger (1,2,3) is connected to a heat flow from the CO₂ capture plant (5) or a CO₂ compression unit (13). A return flow from the heat exchanger (1,2,3) is led to the CO₂ capture and compression system (5,13) or to the power plant (6). The power plant system allows an increase in overall efficiency of the system.

The present invention relates to a cooling device, in particular for cooling of components of power electronics, using a coolant which flows through a micro heat exchanger (10) having a good heat contact with the component (1), and wherein the coolant is selected in such a way that it evaporates in the micro heat exchanger (10) at the desired component temperature.

A radial flow heat exchanger for heating or cooling a fluid includes a sealed fluid manifold for passage of fluid. A sealed fluid receiving hub is spaced interiorly of the interior peripheral portion of the manifold and includes a passageway for passage of fluid into or out of the heat exchanger. A plurality of separate and spaced fluid flow tubes are disposed between the manifold and the hub. Each of the tubes are in sealed fluid communication with the manifold at one end and the other end is in sealed fluid communication with the hub. A fin assembly is positioned between the manifold and the hub and includes a heat conducting material arranged at spaced intervals between the manifold and the hub, the heat conducting material including a plurality of spaced apertures through which tubes pass. The heat conducting material is in intimate heat conducting contact with the tubes whereby fluid flowing between the manifold and the hub flows into each of the tubes in a radial direction between the manifold and the hub and wherein the heat conducting material of the fin assembly operates to give up or pick up heat from the fluid through the wall of the tubes.

The multi-tube heat exchanger includes a bundle of tubes which form fluid passages of first heat exchanging fluid, an outer shell which covers the bundle of tubes and form a fluid passage of second heat exchanging fluid, and a baffle plate which is arranged inside the outer shell in a direction intersecting an axial direction of the bundle of tubes and provided with a plurality of through holes through which respective tubes of the bundle are passed. Each of the through holes has such a shape that a portion of an outer peripheral face of the tube comes into contact with a portion of an inner peripheral face of the through hole, and a gap for passing the second heat exchanging fluid is formed between the other portion of the inner peripheral face and the outer peripheral face of the tube. It is possible to support the tubes with high dimensional accuracy, and to enhance heat exchanging efficiency by decreasing fluid resistance. It is also possible to make pitch of the through holes smaller and to make the heat exchanger compact.

Low melting point metal such as Zn is sprayed onto a flat surface (3a) of an aluminum flat tube (3) to form a sprayed metal coating (15) thereon inmediately after extrusion of the flat tube. Inmediately thereafter, a brazing foil (11) is integrally adhered onto the sprayed metal coating (15). The obtained flat tube (3) with the brazing foil is combined with a corrugated fin (4) to form a temporary assembly. Then, the temporary assembly is heated at a predetermined temperature to braze the tube (3) and the fin (4) to thereby form a heat exchanger core. The low melting point metal may be sprayed on both the flat surface (3a) of the flat tube and the surface of the brazing foil (11). Thus, it becomes possible to obtain a lightweight thin fin and to decrease material costs.

The invention provides a hanging air conditioner which is provided with a frame (2) on which an air outlet is formed. The frame (2) is in pivoted connection with an outer air guiding plate (4) which is matched with the air outlet in shape, and is taken as a cover plate of the air outlet in the closing position, the frame (2) is also in pivoted connection with an inner air guiding plate (6) which is covered by the outer air guiding plate (4) in the closing position, and the outer air guiding plate (4) and the inner air guiding plate (6) are matched to form an air guiding channel on which air guiding ports are alternated in the horizontal direction and the vertical downward direction. The hanging air conditioner can make hot air and cold air balanced rapidly in a room in refrigerating and heating.

The invention relates to a ship fuel preheating system. The ship fuel preheating system is characterized in that a fuel preheating branch pipeline and a fuel conveying branch pipeline are arranged between a storage bin and a sedimentation cabinet. A main pipeline is shared and is divided into two branches near the sedimentation cabinet, a preheating pump is arranged on one branch and provides high temperature fuel for the storage bin, a transfer pump is arranged on the other branch and conveys heated heavy oil to the sedimentation cabinet, and the two branches are provided with stop check valves in the corresponding directions so as to avoid pipeline direction malposition. A small compartment is arranged at one corner of the storage bin, and a first partition plate is arranged in the middle of the small compartment and divides the compartment into two parts in the X direction. A pipe A and a pipe B are arranged in a first sub-compartment, the upper right corner of the first partition plate is provided with a hole, the lower left corner of a second partition plate is provided with a hole, and the two holes are in opposite angle arrangement. Small holes are formed at the bottoms of partition plates to be used for sweeping. An upper plate of the compartment is provided with a plurality of air holes, so as to guarantee timely overflow of generated steam. The pipe A and the pipe B are communicated with the main pipeline and provided with regulating valves respectively.

A heating system for preheating a fluid. The heating system comprises a heating unit with a heating flow path; wherein the heating unit is adapted to be operated at a first temperature and to provide a heat transfer between the heating unit and the fluid passing through the heating flow path, with the heat transfer not being sufficient for heating up the fluid passing through the heating flow path to the first temperature.

A design for equipment and process for reliquefaction of LNG boiloff gas, primarily for shipboard installation, has high thermodynamic efficiency and lower capital cost, smaller size (volume, footprint), lower weight, and less need for maintenance than systems utilizing the prior art. The main refrigerant gas compressor is reduced to a single stage turbocompressor. Optional elements include: compression of boiloff gas at ambient temperature; compression of boiloff gas in one or two stages; turboexpansion of refrigerant gas incorporating one or two turboexpanders; turboexpander energy recovery by mechanical loading, compressor drive, or electric generator; refrigerant sidestream for cooling at the lowest temperatures.

The invention relates to a solid particle heater exchanger, which comprises a cylindrical shell, wherein the top of the shell is provided with an upper connecting box for receiving particles, the middle part of the shell is provided with a heat exchange chamber, the bottom of the shell is provided with a lower connecting box for discharging the particles, a heat exchange pipe bundle is arranged in the heat exchange chamber, the heat exchange pipe bundle is provided with a fluid inlet and a fluid outlet on the shell, and a heat transfer fluid source is connected to the fluid inlet; a distributor is arranged between the upper boxing box and the heat exchange chamber; the distributor comprises a silk screen layer which is connected with a control device; the control device comprises a weight inductor and a vibrator, wherein the signal output end of the weight inductor is electrically connected with the controlled end of the vibrator, and the inducting end of the weight inductor and the output end of the vibrator are respectively connected with the silk screen layer. The invention also relates to a solid particle heat exchange system adopting the solid particle heat exchanger. According to the invention, sufficient heat transfer can be ensured, the particle discharge temperature can be controlled to meet the requirements, the discharging temperature of the heat transfer fluid can be ensured to be basically constant, and favorable energy-saving effect is achieved.

The invention provides a method for improving temperature gradient in a high-temperature tension sample of a heat expansion phase change instrument. The method is characterized in that one of following methods is improved in the tension test process: a clamp is prepared from austenitic stainless steel to replace the existing clamp to test; or, a U-shaped heat isolation sleeve and a fixed screw heat isolation ring are arranged at the contact part of the sample clamping end and the clamp to completely isolate the clamp, the fixed screw and the tension sample through the U-shaped heat insulation sleeve and the fixed screw heat isolation ring, and the clamp is prepared from austenitic stainless steel to replace the existing clamp to test. The method has the advantages that the austenitic stainless steel is used as the clamp preparation material and the ceramic fiber sheet is used as the heat isolation sleeve and the heat isolation sleeve, so that the heat radiation and heat conduction of high-temperature objects and low-temperature objects are effectively inhibited; the operation is easy, the detachment and installation of the sample are convenient, and the material stability is guaranteed.

Apparatus for the thermal management of high pressure gas storage tanks wherein the compression heat of refueling the tank is evacuated from the interior of the tank in which a gas circulates within the tank powered by a pump powered and as the gas traverses from the high pressure refuel depot to the storage tank, the circulating gas absorbs the refueling heat and carries the heat to a cooling system having a supplemental heat exchange device before the gas is introduced into the tank. The apparatus may be operated in reverse to transfer heat from a source to the tank interior to provide more complete exhaustion of the tank during vehicle operation.

The invention discloses a sensor for temperature and heat-flow measuring under a high temperature environment. The sensor comprises a protection case body and measurement assemblies. The two sets of measurement assemblies are arranged on a fixation base, which is arranged on the front end face of the protection case body, in the same way; a cooling jacket in each measurement assembly is arranged in a through-hole of the fixation base; and an inlet pipe and an outlet pipe, which are internally and externally sleeve-connected, are arranged in the cooling jacket. Measurement columns, each of which is externally coated with a heat-insulation inner sleeve and a heat-insulation outer sleeve respectively, are fixedly arranged on the front end face of the fixation base; and the middle part of each measurement column is connected with an electric heating terminal of one thermocouple and the real part of each measurement column is connected with an electric heating terminal of one thermocouple. The sensor for temperature and heat-flow measuring is formed through the said structure; through double thermopiles, heat-flow, that reaches the end faces of the measurement columns, can be measured, besides, temperature of gas or solid that is contacted with the end faces of the measurement columns can be measured; the sensor, which can work under the high temperature environment, with the highest working temperature up to 1300 DEG C, can realize a two-parameter measurement of the temperature and the heat-flow.