Simulation model for the performance analysis of roof pond systems for heating and cooling
A detailed computer model has been developed for simulating the dynamic thermal behavior of roof pond systems. The model is composed of outer movable insulation, an optional evaporative water layer over water bags on steel decking, and an inner movable insulation. A control strategy for the movable insulations which provides near optimum thermal performance is included in the model. An hourly thermal balance analysis of the system is performed using theoretical and/or empirical expressions to determine the heat transfer coefficients for each of the surfaces in the model. The model has been used to study the effect on system thermal performance of (1) the R-value of both the top and bottom movable insulations; (2) the depth of the pond water, and (3) the depth of the evaporative layer. The heating and cooling potentials of the roof pond have also been investigated in four climates. The model was developed for incorporation into the public domain building energy analysis computer program BLAST.
- Research Organization:
- California Univ., Berkeley (USA). Lawrence Berkeley Lab.; Abadan Inst. of Tech. (Iran); California State Univ., Humboldt, Arcata (USA). Dept. of Chemistry
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5320725
- Report Number(s):
- LBL-9292(Rev.); CONF-800604-34(Rev.)
- Resource Relation:
- Conference: American section of the International Solar Energy Society conference, Phoenix, AZ, USA, 2 Jun 1980
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BUILDINGS
ROOF PONDS
MATHEMATICAL MODELS
COMPUTER CALCULATIONS
COMPUTERIZED SIMULATION
CONTROL SYSTEMS
PASSIVE SOLAR COOLING SYSTEMS
PASSIVE SOLAR HEATING SYSTEMS
PERFORMANCE
THERMAL INSULATION
EQUIPMENT
HEATING SYSTEMS
PONDS
SIMULATION
SOLAR COLLECTORS
SOLAR COOLING SYSTEMS
SOLAR EQUIPMENT
SOLAR HEATING SYSTEMS
SOLAR PONDS
140901* - Solar Thermal Utilization- Space Heating & Cooling