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Direct conversion of heat into electrical energy is possible through
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The scales form in heat exchanges after a period of operation and provide additional resistance to heat transfer with some heat transfer coefficient . The reciprocal of this scale heat transfer coefficient is called .
Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the
Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both the cases. The recommended arrangement is
An electric furnace producing heat by means of an electric arc struck between each of three electrodes and the charge is called __________ furnace.
Heat evolved/absorbed during conversion of a substance from one allotropic form to another is termed as the heat of
Absorption/evolution of heat during conversion of a substance from one allotropic form to another is termed as the heat of
Direct conversion of chemical energy into electrical energy is done in a
Pick out the wrong conversion formula for the conversion of weight units :