RD and D opportunities for large heat pump systems

The marketplace factors which constrain a more rapid implementation of energy conserving heating, ventilating, and air conditioning systems and system operation in commercial buildings are evaluated. The investigation concerns electric drive, vapor compression cycle, air conditioning equipment and HVAC distribution and control systems used for the environmental conditioning of buildings. The commercial sector pupulation of buildings used include 11 building types. System/equipment descriptions; state of the art energy conservation concepts; energy use and system cost comparisons; buildings/equipment populations and usage patterns; and nontechnical constraints on the development and use of energy conserving sytems are discussed. Research recommendations are made.