The analysis of a large amount of data on the failures of absorbtion refrigeration machines of the ammonia-water typr was carried out. The data derive from the records of a 10 years maintenance contract under which every machine was installed. The records were comuterized for the period 1989 - 1992, and they refer to sales starting from 1980 (i.e. to 73 778 machines). The failures are classified, identifying the most serious (generator and solution pump). The rate of early failures is rather high, but the failures are generally minor and easily repaired. The production quality was not constant, with a very bad year in 1984. The failure rate is evaluated for the first 10 years of life of the equipment. In general terms, one machine in two does not require any intervention during that period.
Experimental report on the reliability of ammonia - water absorption chillers
ROMAGNONI, PIERCARLO
1996-01-01
Abstract
The analysis of a large amount of data on the failures of absorbtion refrigeration machines of the ammonia-water typr was carried out. The data derive from the records of a 10 years maintenance contract under which every machine was installed. The records were comuterized for the period 1989 - 1992, and they refer to sales starting from 1980 (i.e. to 73 778 machines). The failures are classified, identifying the most serious (generator and solution pump). The rate of early failures is rather high, but the failures are generally minor and easily repaired. The production quality was not constant, with a very bad year in 1984. The failure rate is evaluated for the first 10 years of life of the equipment. In general terms, one machine in two does not require any intervention during that period.
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