Nashville solar-water-heater demonstration project. Monitoring data analysis. Interim report, June 1981-August 1981

Technical Report · Thu Jan 01 04:00:00 EST 1981

DOI:https://doi.org/10.2172/6741727· OSTI ID:6741727

The performances of the 23 monitored solar domestic water heater systems (SDWHS) in the Nashville program were monitored during June through August of 1981. Instrumentation recorded data at 15-minute intervals and transmitted these data every day over conventional telephone lines to be translated and stored on computer tape for later analysis. The quantities measured and recorded were (1) solar thermal load supplied to the water stream, (2) total thermal load supplied to the water stream by the SDWHS, (3) gallons of hot water used, and (4) total electrical load used for the electrical elements, solar loop pump(s), and differential controller. These data were analyzed by computer to produce monthly reports, which included daily and total summaries for each customer. A summary of three months of data collected in Nashville, Tennessee is presented. The measured monthly electric kWh used by the average solar system is compared to the calculated electric kWh used by a conventional electric water heater (CEWH) that was assumed to be 80% efficient and delivered the same thermal load. The current electric rate charged by Nashville Electric Service during the three months ($0.04157/kWh) was used to determine the savings.

• Research Organization: Tennessee Valley Authority, Knoxville (USA)
• OSTI ID: 6741727
• Report Number(s): TVA/OP/ECR-82/39; ON: DE83900171
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140907* -- Solar Thermal Utilization-- Water Heating
29 ENERGY PLANNING, POLICY, AND ECONOMY
299001 -- Energy Planning & Policy-- Solar-- (1989-)
APPLIANCES
DATA ACQUISITION
DATA ANALYSIS
EQUIPMENT
FEDERAL REGION IV
HEATERS
HEATING LOAD
MONITORING
NORTH AMERICA
PERFORMANCE
SOLAR EQUIPMENT
SOLAR WATER HEATERS
TENNESSEE
USA
WATER HEATERS