Geothermal heat pumps use a pumping mechanism to absorb heat energy from under the ground and “pump” it into your house. The clever part is that due to a clever trick, they only use about one unit of electricity to “pump” about 4 units of heating into your house. Electric heaters use one unit of electricity to generate one unit of heating, so Geothermal Heat Pumps are four times more efficient. The downside is that they only work on lower temperature systems, meaning you really need to have underfloor heating to make use of them effectively.
This tube heat exchanger is suited for higher-pressure applications. As its name implies, this type of heat exchanger consists of a shell (a large pressure vessel) with a bundle of tubes inside it. One fluid runs through the tubes, and another fluid flows over the tubes (through the shell) to transfer heat between the two fluids. The set of tubes is called a tube bundle, and may be composed by several types of tubes: plain, longitudinally finned, for this exchanger to be able to transfer heat well, the tube material should have good thermal conductivity for varied applications.
Because heat is transferred from a hot to a cold side through the tubes, there is a temperature difference through the width of the tubes. Because of the tendency of the tube material to thermally expand differently at various temperatures, thermal stresses occur during operation. This is in addition to any stress from high pressures from the fluids themselves. The tube material also should be compatible with both the shell and tube side fluids for long periods under the operating conditions (temperatures, pressures, pH, etc.) to minimize deterioration such as corrosion. All of these requirements call for careful selection of strong, thermally-conductive, corrosion-resistant, high quality tube materials, typically metals, including copper alloy, stainless steel, carbon steel, non-ferrous copper alloy, Inconel, nickel, Hastelloy and titanium.Poor choice of tube material could result in a leak through a tube between the shell and tube sides causing fluid cross-contamination and possibly loss of pressure.
Geothermal heat pumps use a pumping mechanism to absorb heat energy from under the ground and “pump” it into your house. The clever part is that due to a clever trick, they only use about one unit of electricity to “pump” about 4 units of heating into your house. Electric heaters use one unit of electricity to generate one unit of heating, so Geothermal Heat Pumps are four times more efficient. The downside is that they only work on lower temperature systems, meaning you really need to have underfloor heating to make use of them effectively.
This tube heat exchanger is suited for higher-pressure applications. As its name implies, this type of heat exchanger consists of a shell (a large pressure vessel) with a bundle of tubes inside it. One fluid runs through the tubes, and another fluid flows over the tubes (through the shell) to transfer heat between the two fluids. The set of tubes is called a tube bundle, and may be composed by several types of tubes: plain, longitudinally finned, for this exchanger to be able to transfer heat well, the tube material should have good thermal conductivity for varied applications. 
nice post.Badrin Industries Incepted in the year 1986. We introduce ourselves as a well noted manufacturer, supplier and exporter of heat transfer equipmentsFinned Tubes
ReplyDelete