Simulaton of a solar heating and cooling system with experimental evaluation Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/5t34sp144

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  • This thesis is concerned with simulating two forms of energy retrieval. Standard computer programs are routinely used to simulate such energy systems. However, the accuracy of these simulations is not well documented. The main objective of the work presented here is to evaluate the validity of this type of simulation for the system considered. The two forms of energy retrieval are (i) the collection of solar energy to provide heated water, and (ii) the utilization of waste heat from a 250 MVA transformer cooling oil circuit to heat a refrigerant in a heat pump circuit. The system is installed and operating at the Ross Substation near Vancouver, Washington. The system provides space conditioning and operates in two modes, cooling and heating. In cooling, a solar-collector/absorption-cooling system provides the primary cooling with a heat pump as a backup. In heating, the heat pump provides the primary heating with a solarcollector/ storage-tank system as a supplement, and electrical resistance heating as a backup. Both heating and cooling modes of operation are simulated and the results are compared with measured data from the operating system. Simulations of this system using basic parameters provided from design specifications gave results that compared poorly with results obtained from measured data. Calculations based on the measured performance indicated that many of these basic parameters were in error. Using parameters obtained from the measured data, simulations gave results which were close to measured values. The areas in which these parameter errors occurred are in (i) component performance of the solar collector and heat pump models, (ii) component control of the absorption cooler, and (iii) building heat gains. The conclusion reached, based on the simulation work done, is that accurate simulations can be obtained, but in order to achieve them, detailed knowledge of the system's operating characteristics is required.
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  • File scanned at 300 ppi (Monochrome) using Capture Perfect 3.0.82 on a Canon DR-9080C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
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  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-09-11T19:19:46Z (GMT) No. of bitstreams: 1 LaytonWilliamC1980.pdf: 1117283 bytes, checksum: 7f284052a22ee119b5c65f574a01c14c (MD5)
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