Príspevok
Off the shelve reciprocating compressor with little wear after employment in high temperature heat pump for more than 1400 hours of operation
DOI: 10.18462/iir.compr.2024.0610
Stav prijatia: Nebol spracovaný
Autori
| Meno | Organizácia | |
|---|---|---|
| Leon Brendel, PhD | Ostschweizer Fachhochschule |
Abstrakt
High temperature heat pumps will be an important technology to replace industrial heating in the temperature range from 100 to 200 °C, which is currently supplied by oil and gas burners. The lifetime of compressors and lubricating oil at high suction and discharge temperatures is currently unclear. For this study, a reciprocating compressor was disassembled after approximately 1400 hours of operation in a high temperature heat pump. At least 300 hours of operation showed discharge temperatures of 120 °C, 30 hours of more than 150 °C. The cylinder head seal was damaged, colorization of the valve plate was observed and small wear was found, possible as a result of a low oil viscosity. All other parts of the compressor were unaffected although the compressor was not specifically designed for operation at such high temperatures. Various oil measurements did not show significant deviations from the fresh oil. The study shows that the compressor and oil was more resilient to the high temperatures than expected albeit more runtime is needed to gain confidence into operation in a real plant over several years.
Kľúčové slová
high temperature
heat pump
compressor
oil
degradation