Control apparatus and method for parallel-type chiller, and computer-readable recording medium in which program for parallel-type chiller is stored
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United States of America Patent
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Sep 27, 2016
Grant Date -
Mar 13, 2014
app pub date -
Sep 4, 2013
filing date -
Sep 12, 2012
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Abstract
A control apparatus for a parallel-type chiller provided with multiple shell-and-tube-type heat exchangers and multiple compressors, the control apparatus having an estimation section which estimates a terminal temperature difference in an upstream-side space on the basis of a terminal temperature difference between a saturation temperature of a second fluid and a measured exit temperature value, the saturation temperature being estimated on the basis of a pressure value of the second fluid in a downstream-side space, the measured exit temperature value being a temperature of the first fluid measured at an exit of the heat exchanger, and estimates a temperature of the first fluid in the vicinity of an exit of the upstream-side space on the basis of the terminal temperature difference in the upstream-side space and the saturation temperature of the second fluid in the upstream-side space.
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