There is increasing demand for domestic and industrial refrigeration, space heating and air
conditioning. Heat pump systems offer economical alternatives for recovering heat from …

The development of high temperature heat pumps for waste heat recovery benefits industrial
processes by meeting demand, increasing energy efficiency, and reducing emissions. The …

The precision air conditioner is usually used in many occasions where the temperature and
humidity are required to be constant. To guide the performance optimization of the precision …

Heat pump technology has the capability to upgrade unusable low-temperature waste heat
and make the upgraded heat usable for different types of industrial and domestic heating …

Two mechanically driven small-scale turbocompressors running on gas lubricated bearings
have been theoretically designed for a 6.5 kW two-stage heat pump functioning under …

Using natural refrigerants in heat pumps, including hydrocarbons, is becoming attractive
because of the tightening regulations concerning synthetic refrigerants. In the literature there …

The paper describes the investigations of a novel R718 refrigeration cycle with single stage
centrifugal compressor and two-phase ejector as a second stage compression device. The …

In this article, modeling and optimization of power consumption of two-stage compressed air
system have been investigated. To do so, the two-stage compressed air cycle with …

This paper investigates the thermodynamic potential of using multi-stage variable speed
counter rotating axial impellers as part of a water chiller system to compress water vapor …

an optimized centrifugal compressor design when its metal parts are cold-before the
conjugated heat transfer between the fluid and parts reaches an energetic equilibrium. The …