Annual Cycle Energy System characteristics and performance
The Annual Cycle Energy System (ACES) provides space heating, air conditioning, and domestic water heating while using substantially less energy than competing systems providing the same services. The ACES is based on an electrically driven, unidirectional heat pump that extracts heat from an insulated tank of water during the heating season. As the heat is extracted, most of the water freezes, and the stored ice provides air conditioning in the summer. A single-family residence near Knoxville, Tennessee is being used to demonstrate the energy conserving features of the ACES. A second similar house, the control house, has been used to compare the performance of the ACES to both an electric resistance heating and hot water with central air conditioning system and an air-to-air heat pump system. The results of the first year's operation from November 1977 through mid-September 1978 showed that the ACES consumed 9012 kWh of electricity while delivering an annual coefficient of performance (COP) of 2.78. The control house consumed 20,523 kWh of electricity while delivering an annual COP of 1.13. The second annual cycle was started on December 1978. The ACES was compared with an air-to-air heat pump during this period. During the ice storage portion of this test year, December 1, 1978 to September 1, 1979, 5705 kWh of electricity was used by the ACES, compared to 12,014 kWh for the control house. The respective COPs are 1.40 for the control house with the heat pump and 2.99 for the ACES house during this period. Annual energy consumption for the test year was 6597 kWh and the annual COPs were 1.41 for the control house and 2.81 for ACES. ACES is achieving its anticipated performance. The ACES concept and its general engineering performance as compared to conventional HVAC system are described and discussed.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5420989
- Report Number(s):
- CONF-800524-2
- Resource Relation:
- Conference: International congress on building energy management, Povoa de Varzim, Portugal, 12 May 1980
- Country of Publication:
- United States
- Language:
- English
Similar Records
Annual cycle energy system (ACES). Performance report, November 1977-September 1978
Annual cycle energy system
Related Subjects
ANNUAL CYCLE ENERGY SYSTEM
OPERATION
PERFORMANCE
AIR CONDITIONING
ENERGY CONSERVATION
EXPERIMENTAL DATA
GRAPHS
HEAT PUMPS
HEAT STORAGE
HOT WATER
HOUSES
POWER DEMAND
SPACE HEATING
TENNESSEE
BUILDINGS
DATA
DATA FORMS
ENERGY STORAGE
HEATING
HYDROGEN COMPOUNDS
INFORMATION
NORTH AMERICA
NUMERICAL DATA
OXYGEN COMPOUNDS
RESIDENTIAL BUILDINGS
SOUTHEAST REGION
STORAGE
USA
WATER
320101* - Energy Conservation
Consumption
& Utilization- Residential Buildings- (-1987)