Refrigeration efficiency improvement by reducing the difference between temperatures of heat rejection and heat absorption

摘要

The surroundings heat exchanger envelops an enclosure's insulation so that it exchanges part of its heat load directly through the enclosure, instead of indirectly with the surroundings which would then exchange an equal amount of heat with the enclosure. This reduces the temperature differentials required to drive heat a transfer because little heat remains to be transferred by the indirect path. This is augmented, in some cases, either by exchanging heat with media other than gas, comprising conductive solids or liquids, natural or forced convective liquid systems, or phase change systems comprising thermal storage or combination refrigeration/heat-pumping systems or combining the heat supplier of a refrigeration system with the heat absorber of a heat pumping system; or by avoiding unnecessarily high temperatures when pumping heat into hot water systems by either or both of the following means: regulating temperatures at lower set points or zoning heat pumps according to user need, which improves efficiency significantly, when heat is provided by heat pump, as it does not when heat is provided by electric resistance heating or combustion of fossil fuel.