A correction factor to f-Chart predictions of active solar fraction in active-passive heating systems

Journal Article · Wed Jun 01 04:00:00 EDT 1983 · Proc. Annu. Meet. - Am. Sect. Int. Sol. Energy Soc.; (United States)

OSTI ID:5122081

Evans, B L; Duffie, J A; Klein, S A

The object of this study was to determine to what extent a passive system degrades the performance of an active solar space heating system, and to develop a correction factor to account for these interactions, if warranted. The transient system simulation program TRNSYS has been used to simulate the hour-by-hour performance of combined active-passive (hybrid) space heating systems in order to compare the active system performance with simplified design method predictions. After establishing a number of probable factors in active-passive interactions, TRNSYS simulations were compared to results obtained using the simplified design calculations of the fChart method (2). First, comparisons of TRNSYS and f-Chart were used to establish the accuracy of the f-Charts for active systems. A correlation was then developed to correct the monthly loads input into the f-Chart method to account for controller deadbands in both hybrid and active only buildings. Additional comparisons were then used to develop a general correction factor to be applied to the f-Chart method to produce more accurate and useful results for hybrid systems.

• Research Organization: Solar Energy Laboratory, University of Wisconsin-Madison, Madison, WI
• OSTI ID: 5122081
• Journal Information: Proc. Annu. Meet. - Am. Sect. Int. Sol. Energy Soc.; (United States), Journal Name: Proc. Annu. Meet. - Am. Sect. Int. Sol. Energy Soc.; (United States) Vol. 6; ISSN PMSID
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140901* -- Solar Thermal Utilization-- Space Heating & Cooling
COMPUTER CODES
COMPUTERIZED SIMULATION
CORRECTIONS
ENERGY SYSTEMS
EQUIPMENT
F-CHART
HEATING
HEATING SYSTEMS
HYBRID SYSTEMS
PASSIVE SOLAR HEATING SYSTEMS
PERFORMANCE
SIMULATION
SOLAR EQUIPMENT
SOLAR FRACTION
SOLAR HEATING
SOLAR HEATING SYSTEMS
SOLAR SPACE HEATING
SPACE HEATING
T CODES