CO2 evaporators should be operated without superheat, heat recovery should be employed, says Professor Armin Hafner.
R290 achieves better capacities and efficiency in test by Petra Engineering.
The compressor’s drive relies on a gear mechanism to reduce overall friction and vibrations.
Engineers Without Borders USA selects three vapor-compressor projects, two with hydrocarbons and one with ammonia, plus four others, for developing world.
A subcooling system equipped with thermoelectric modules improves cooling capacity up to 33%, and COP upto 24%, a study found.