Using Waste Heat For Energy Savings

In large CII applications, a WTWHP offers another heat pump choice. A WTWHP can be a field assembled collection of components, or a factory packaged unit. The latter could be a water-cooled liquid chiller that has been modified to produce hot water at a specified temperature, rather than chilled water at a specified temperature. In a chiller, the useful work is heat removal done in the evaporator. In a WTWHP, the useful work is the heat output done in the condenser (although WTWHPs are sometimes used simultaneously as water chillers). This article will focus on factory packaged WTWHPs large enough to provide more than 500 MBtu/h (145 kW) of heat.