| Popis: |
Heat pipes are used to perform several important heat-transfer roles in the chemical and closely allied industries. Examples include heat recovery, the isothermalizing of processes, and spot cooling in the molding of plastics. In its simplest form the heat pipe possesses the property of extremely high thermal conductance, often several hundred times that of metals. As a result, the heat pipe can produce nearly isothermal conditions making an almost ideal heat-transfer element. In another form the heat pipe can provide positive, rapid, and precise control of temperature under conditions that vary with respect to time. The heat pipe is self-contained, has no mechanical moving parts, and requires no external power other than the heat that flows through it. Keywords: Heat exchange; Pipes; Design; Operation principles; Limits; Material selection; Working fluid; Wick; Operating lifetime; Heat-solvent recovery; Mold coolers; Reaction vessels; Isothermal furnaces |
