Carnot thermal efficiencies of chemical heat pumps operating between four temperature levels - A heuristic approach

Conference · Mon Jun 01 00:00:00 EDT 1987 · ASHRAE Trans.; (United States)

OSTI ID:6425124

Ally, M R

The Carnot coefficient of performance (CCOP) expression for heat pumps operating between four temperature levels is developed from first principles. The four temperature expressions may be used whenever the components are all at different temperatures. The derived Carnot COP expressions for four discrete temperatures become identical to the published ones representing three discrete temperatures when the two intermediate temperatures coalesce into a single value, thereby validating the result. A heuristic approach is then adopted to analyze some of the possible consequences of four-temperature cycles, especially regarding improvements in temperature lift and boost.

• Research Organization: Efficiency and Renewables Research Section, Energy Div., Oak Ridge National Lab., TN (US)
• OSTI ID: 6425124
• Report Number(s): CONF-870620-
• Journal Information: ASHRAE Trans.; (United States), Vol. 93:2; Conference: Annual meeting of the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Nashville, TN, USA, 28 Jun 1987; Other Information: Technical Paper NT-87-29-4
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
CHEMICAL HEAT PUMPS
THERMAL EFFICIENCY
CARNOT CYCLE
COEFFICIENT OF PERFORMANCE
HEAT TRANSFER
TEMPERATURE DEPENDENCE
THERMODYNAMICS
EFFICIENCY
ENERGY TRANSFER
HEAT PUMPS
THERMODYNAMIC CYCLES
320106* - Energy Conservation
Consumption
& Utilization- Building Equipment- (1987-)