Graduate Thesis Or Dissertation

 

Computer simulation and evaluation of solar cooling systems with hot and cold storage options Public Deposited

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/r494vn56m

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  • In this thesis, computer simulation and evaluation of solar cooling systems are presented. The simulations were conducted using the TRNSYS program, developed at the University of Wisconsin. The TRNSYS program was modified by the addition of new models for the solar collector with high fluid thermal capacity, the absorption cooler, and a systems controller. These models are described. Several aspects of solar cooling systems design are presented here. The options of storing surplus availability at temperatures greater than 76°C (hot storage) and at temperatures less than 12°C (cold storage) are examined and discussed in detail. Analysis is also conducted to determine solar collector exiting temperature response to abrupt changes in solar insolation, with collector fluid thermal capacity and airconditioner nominal capacity as parameters. The affect of sink temperature on system performance and the question of using cooling towers are investigated. Problems associated with computer simulations and their solutions are discussed. The results indicate that the system with the cold storage consumes less auxiliary energy than the system with the hot storage, both systems being of equal size and capacity. However, the system with the cold storage requires a solar collector with high fluid thermal capacity. With regard to the effect of sink temperature on system performance, there is a sharp drop in the performance for sink temperatures exceeding 25°C.
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