Process cooling below ambient temperature is an energy demanding part of many chemical production processes. Compression refrigeration systems operating at very low temperatures consume a lot of high quality utility such as electricity or high pressure steam to drive the compressor units. In industrial process clusters with several processes operating at low temperatures, it is important to inv...

The most critical problem in the world is to meet the energy demand, because of steadily increasing energy consumption. Refrigeration systems` electricity consumption has big portion in overall consumption. Therefore, considerable attention has been given to refrigeration capacity modulation system in order to decrease electricity consumption of these systems. Capacity modulation is used to mee...

The current work investigates the exergy analysis of a new system to generate power, heat, and refrigeration. In the proposed system, the heat loss of a gas turbine (GT) is first recovered by a Heat Recovery Steam Generator (HRSD), then by an Organic Rankine Cycle (ORC) to generate warm water and additional power, respectively. In the ORC, reheating is used to increase the output power, the req...

The dependency on fossil fuels for power generation can be reduced by enhancing the energy efficiency of generating systems. refrigeration systems that typically use electricity consume a significant portion supplied to cities. STAND-ALONE system which consists combined Organic Rankine Cycle and Vapor Compression (ORC-VCR) is analyzed using first law thermodynamics. Dry natural hydrocarbons suc...

In view of the current test methods and evaluation indicators for performance cold storage freezing systems, a experimental platform with micro-channel heat exchanger is designed using inject technology, power consumption cooling are tested under different conditions internal external environment temperatures, vapor injecting flux, compressor speed, pattern. The results provide us useful source...

In this paper, an exergoeconomic and exergetic sustainability analysis of a dual-pressure organic Rankine cycle (ORC) vapor compression refrigeration (VCRC) driven by waste heat is performed for power generation cooling production. addition, the most suitable fluid couple among thirty-five different pairs was investigated proposed combined system. The results indicate that highest energy utiliz...

Cryosurgery is a technique for destroying undesirable tissue, such as cancers, by exposing it to a very low temperature. This paper presents a thermodynamic modeling tool that has been developed for a two stage, mixed gas Joule-Thomson (MGJT) cryoprobe used for cryosurgery. A conventional vapor compression (VC) cycle using a pure refrigerant precools the MGJT cycle providing refrigeration at th...

The principle of corresponding states is used to evaluate the effects of the thermodynamic characteristics of the working fluid on the performance of refrigeration cycles. The desired characteristics, expressed in terms of the critical temperature and ideal gas heat capacity cc;) using propane as the reference fluid, are examined for various departures from the theoretical (ideal) vapor compres...