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Placing a conductive thick metal plate, referred to as a cold plate, as a heat transfer interface between a heat source and a cold flowing fluid (or any other heat sink) may improve the cooling performance. In such arrangement, the heat source is cooled under the thick plate instead of being cooled in direct contact with the cooling fluid.
Economizer tubes often have projections like fins to increase the heat transfer surface on the combustion gas side. [1] On average over the years, [clarification needed] boiler combustion efficiency has risen from 80% to more than 95%. The efficiency of heat produced is directly linked to boiler efficiency. The percentage of excess air and the ...
The heat transfer medium is a refrigeration system, such as water, air, ice, and chemicals are referred to as refrigerants. A refrigerant is employed either in a heat pump system in which a compressor is used to drive thermodynamic refrigeration cycle , or in a free cooling system that uses pumps to circulate a cool refrigerant (typically water ...
Advantages of plate and fin heat exchangers: High heat transfer efficiency especially in gas treatment; Larger heat transfer area; Approximately 5 times lighter in weight than that of shell and tube heat exchanger. [citation needed] Able to withstand high pressure; Disadvantages of plate and fin heat exchangers:
These sensors operate by introducing a small amount of heat into the gas stream and measuring the temperature change downstream. The rate of heat dissipation correlates directly to the mass flow rate of the gas, providing precise measurements even at low flow rates. [2] Thermal flow sensors are particularly advantageous for gas meters due to ...
Besides low efficiency and relatively high cost, practical problems exist in using thermoelectric devices in certain types of applications resulting from a relatively high electrical output resistance, which increases self-heating, and a relatively low thermal conductivity, which makes them unsuitable for applications where heat removal is ...
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A high degree of flexibility is present in plate-fin heat exchanger design as they can operate with any combination of gas, liquid, and two-phase fluids. [3] Heat transfer between multiple process streams is also accommodated, [ 4 ] with a variety of fin heights and types as different entry and exit points available for each stream.