Waste heat recovery has been considered as an attractive technique to improve the overall energy utilization efficiency of internal combustion (IC) engines. In this paper, distinct from most past research work, a thermally driven refrigeration system based on combined organic Rankine and vapour compression cycles is proposed recover IC engines’ waste contained in cooling water. Based concept, l...

The energy demand of industries accounts for about 30–35% world yearly consumption, a relevant percentage is due to the need heating and cooling demand. Solar technologies can be integrated in industrial processes reduce fossil fuels consumption as well related greenhouse gas emissions. This paper reports experimental analysis novel hybrid sorption-compression chiller refrigeration purposes cas...

A vapor jet refrigeration system (VJRS) is an alternative to the conventional mechanically driven vapor-compression refrigeration system. The VJRS utilizes supersonic ejector as thermal compressor and has the potential to reduce energy consumption and utilize low grade energy for driving the refrigeration systems. In the present study, the performance characteristics of VJRS ejectors with R134a...

The refrigeration and air conditioning industry shows much interest in environmentally-friendly natural refrigerants. One such refrigerant is R744, carbon dioxide. It is attractive because it is not toxic, not flammable, and is widely available as a byproduct of industrial processes. However, carbon dioxide (CO2) systems operate at much higher pressures than systems using HCFC, HFC, or HFC-blen...

1 This project is subsidized by the natural science fund of Shaanxi Province (serial number of project: 2004E210) Abstract: In this paper, according to practical consideration, a new solar powered rotary solid adsorption refrigerator system adopting activated carbon fibre + ethanol as its adsorption pair has been designed with higher performance. Moreover, the principle of the refrigeration cyc...

As described in Part I, the supermarket simulation software “SuperSim” with its integrated refrigeration, building and HVAC system models, can be used to evaluate, compare and optimize alternative supermarket refrigeration systems. In Part II the model was used to evaluate and compare the performance of a CO2 booster refrigeration system with that of a conventional R404A multiplex system in a s...

Compared with traditional gas-compression/expansion refrigeration, magnetic refrigeration based on magnetocaloric effect (MCE) exhibits the advantages of high energy efficiency and environment friendliness. Here, we created large MCE in RFeO3 (R = Tb or Tm) single crystals by the magnetization vector rotation of single crystal with strong magnetocrystalline anisotropy (MCA), rather than merely ...

The performance of heat transfer is the essential area research in field thermal engineering. For process transfer, there are numbers refrigerants which used domestic refrigeration to from low-temperature reservoir high-temperature reservoir. vapour compression technology has made a great improvement over few decades form efficiency cycle through significant efforts engineers and manufacturers....

Experimental investigation was done to find the role of capillary tube length and amount of refrigerant charge on the overall heat transfer coefficient in condenser and evaporator and actual COP of a simple vapour compression refrigeration system. It was concluded that increasing of the refrigerant charge in the system largely enhances the overall heat transfer coefficient in the evaporator by ...

Received: 5 April 2004 / Accepted: 14 June 2004 / Published: 15 June 2004 __________________________________________________________________________________ Abstract: On the basis of a four-heat-reservoir endoreversible absorption refrigeration cycle model, another linear heat transfer law [i.e., the heat-flux ) ( 1 − ∆ ∝ T Q ] is adopted, the fundamental optimal relation between the coefficien...