NDLI: An Automation of Collector Testing and Modification of ANSI/ASHRAE 93-1986 Standard

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Huang, B. J. Hsieh, S. W.
Copyright Year	1990
Abstract	The steady-state performance test of solar collectors using ANSI/ASHRAE 93-1986 Standard was revised and an automation for the testing was carried out in the present study in order that the test can be easily performed outdoors in areas with variable weather conditions. It was shown that the 95 percent settling time of the collector τ95 can be adopted as the time basis in the selection of steady-state period for the test. To make the best use of the time available for the testing, the steady-state period defined by ANSI/ASHRAE 93-1986 Standard was changed to the τ95 plus five minutes, or ten minutes, whichever is larger. To reduce scatter uncertainty in the test results, the test period for the efficiency calculation was chosen as the segment of the last five minutes in the steady-state period and a steadiness condition defined statistically was adopted. To shorten the time for each test run a PC-based expert testing system, which is completely automatic and requires no operator, was developed in the present study. Using this expert system associated with the modified ANSI/ASHRAE 93-1986 Standard, we can effectively carry out the collector test at variable weather conditions with small scatter uncertainty and can substantially shorten the duration of a test.
Starting Page	257
Ending Page	267
Page Count	11
File Format	PDF
ISSN	01996231
e-ISSN	15288986
Journal	Journal of Solar Energy Engineering
Volume Number	112
Issue Number	4
DOI	10.1115/1.2929932
Language	English
Publisher	The American Society of Mechanical Engineers
Publisher Date	1990-11-01
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Electromagnetic scattering Expert systems Solar collectors Steady state Testing Testing performance Uncertainty
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment Energy Engineering and Power Technology

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