Solar System for a Solar Cooled School Building in a Subtropical Region. Final Report

摘要

The primary objective of this project was to design a school facility, located in a subtropical environment, which would utilize solar energy to provide 70% of the energy required annually for cooling, and domestic hot water heating. Key design goals were: cost effectiveness, equipment reliability, ease of maintenance, and simplicity and economy of operation. The facility is a two-story elementary school building in Miami, Florida containing approximately 6500 m exp 2 (70,000 sq. ft.) gross floor areas, and a detached mechanical equipment building. The flat-plate collector system provides an energy collection surface of 1983 m exp 2 (21,350 sq. ft.) mounted on a structural aluminum truss system. Water with chemical inhibitors is used to collect and transfer energy to three steel hot water storage tanks with a total capacity of 208 m exp 3 (55,000 gal.) buried horizontally in the earth berm surrounding the building. Hot water is pumped from the storage tanks through 4 parallel lithium bromide absorption chillers rated at 88 kW (25 tons) each. Domestic hot water is preheated to 60 exp 0 C (140 exp 0 F) by use of a heat exchanger in the solar hot water circuit. The solar system design, project delay, developed system problems, and system changes are discussed. (ERA citation 09:028152)