Optimization of CFC-free transport refrigeration machines.

Type of article: Periodical article

Summary

Part 1 of the paper analyses possible refrigerants for future use in road transport refrigeration units. The result places R22 as the most favoured choice. In spite of its ozone depletion potential, its advantages lie in low global warming, both as a leaked chemical and considering its low energy usage, also in avoiding replacement problems after leaking compared to blends. The blend R69L is discounted also due to its very high global warming potential. Part 2 details design decisions that optimize performance and energy efficiency. Electric motor drive is preferred, an alternator being driven from the efficient truck engine where possible. In other cases a separate diesel driven alternator avoids motor heat affecting the compressor or suction line, thus reducing compressor superheat. Oversized finned tube evaporators and condensers reduce temperature differentials and optimization of tube size, pitch and fin design reduces the refrigerant charge and increases efficiency. Wide fin pitch on evaporator air entry rows and an efficient heat pump cycle reduce defrost time and intervals. D.W.H.

Details

Original title: Optimization of CFC-free transport refrigeration machines.
Record ID : 1993-3249
Languages: English
Source: Frigoblock Grosskopf GmbH - 12 p.; 28 fig.; 3 tabl.; append.
Publication date: 1992
Document available for consultation in the library of the IIR headquarters only.

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