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The number of transfer units (NTU) method is used to calculate the rate of heat transfer in heat exchangers (especially parallel flow, counter current, and cross-flow exchangers) when there is insufficient information to calculate the log mean temperature difference (LMTD). Alternatively, this method is useful for determining the expected heat ...
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By 1991, the company had automated its operations and ventured into the mass production of semiconductor products, including TVS and bridge rectifiers. In 1991, the company invested in Eltron Corporation [9] in the United States, resulting in the production of thermal transfer and thermal direct barcode printers. [10]
Smith Corona is an American manufacturer of thermal labels, direct thermal labels, and thermal ribbons used in warehouses for primarily barcode labels.. Once a large U.S. typewriter and mechanical calculator manufacturer, Smith Corona expanded aggressively during the 1960s to become a broad-based industrial conglomerate with products extending to paints, foods, and paper.
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In thermal engineering, the logarithmic mean temperature difference (LMTD) is used to determine the temperature driving force for heat transfer in flow systems, most notably in heat exchangers. The LMTD is a logarithmic average of the temperature difference between the hot and cold feeds at each end of the double pipe exchanger.
This cools the heat sink and whatever it is in direct thermal contact with. Use of fluids (for example coolants in refrigeration) and thermal interface material (in cooling electronic devices) ensures good transfer of thermal energy to the heat sink. Similarly, a fan may improve the transfer of thermal energy from the heat sink to the air.
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