Theoretical models were established to analyze the energetic, exergetic, economic, and environmental (4E) performance of the proposed system in comparison with a conventional dual-heat source/sink air source heat pump (CDHP) system. The effects of different parameters on the performances of the ...
serves as the energy input required for the compression operation. To obtain a cooling effect, part of the refrigerant condensate in the condenser is allowed to expand in evaporator to absorb heat from environment. The rest is recirculated by aliquid circulationpump to generator to complete the ...
Never install the pump in a trench, ditch or hole with a dirt bottom; the legs will sink into the dirt and the suction will become plugged. Figure 2 shows a typical installation of an "A" version float, (an "AU" version will attach to the pump), using a piggy-back plug. 6 ...
Self-optimized efficient operation of trans-critical CO2 ejector-expansion heat pump water heater system with two-stage evaporation In application scenarios with lower ambient temperatures and higher sink temperatures, the trans-critical CO2heat pump water heater system using an ejector... G Liu,H Li...
Jet pumpThermodynamic simulationRefrigerantsGWPThe Constant Rate of Momentum Change (CRMC) criterion attempts to improve the design of supersonic ejectors, that can be used in heat-powered chillers for industrial or air-conditioning use. Moving from its original formulation, the CRMC design method can...
The temperature of the heat source was 26掳C, and that of the heat sink was 5掳C. For 20 kW power generation, the performances of each system, such as the flow rate and efficiency, were compared and studied.J.H. MoonH.S. Lee
The COP, cooling capacity per unit volume, and exergy efficiency of the ejector-compression dual-heat source/sink air source heat pump system were improved by 17.7 %–28.9 %, 18.1 %–36.7 %, and 13.4 %–35.1 %. Ghazizade-Ahsaee et al. [29] theoretically analyzed a horizontal CO2 direct...
Ejector is a device that uses a high-pressure fluid to pump a low-pressure fluid to a higher pressure at a diffuser outlet. Its low cost, no moving parts and ability to handle two-phase flow without damage make it attractive for being the expansion device in the refrigeration system. The...
It removes the mechanical pump from the conventional ejector cooling system. This pump is responsible for recirculating refrigerant from the condenser to the generator (Huang et al., 2006, Srisastra and Aphornratana, 2005). The mechanical pump is the only electricity-consuming and moving component...
energies Article Analysis and Optimization of Exergy Flows inside a Transcritical CO2 Ejector for Refrigeration, Air Conditioning and Heat Pump Cycles Sahar Taslimi Taleghani, Mikhail Sorin and Sébastien Poncet * Department of Mechanical Engineering, Université de Sherbrooke, Sherbrooke, QC J1K2R1, ...