The exergetic analysis is a tool that has been used successfully in many studies aiming a more rational energy consumption to reduce the cost of processes. With this analysis, it is possible to perform an evaluation of the overall process, locating and quantifying the degradation of exergy. This paper applies exergy approach for analyzing the heat exchanger network design and refrigeration of M...

This study evaluates the performance of an R744/R404A cascade refrigeration system (CRS) with internal heat exchangers (IHE) in supermarkets. R744 is used as refrigerant a low-temperature cycle, and R404A high-temperature cycle. In previous studies, there are many studies including theoretical analysis CRS. However, experimental on CRS lacking, research IHE scarce. Therefore, this provides basi...

In this study, a boil-off gas reliquefaction system that is part of liquid ethylene (LEG) carriers evaluated. The formed by two thermally interconnected two-stage refrigeration cycles. working fluid the bottoming cycle ethylene; topping propylene. research based on determining irreversibilities in cycles using entropy-cycle method thermodynamic analysis. impact process performance main componen...

The utilization of geothermal energy is favorable for the improvement efficiency. A hybrid system consisting a seasonal heating and cooling cycle, an absorption refrigeration cycle liquid dehumidification proposed to meet dehumidification, space demands. Geothermal utilized effectively in cascade approach. Six performance indicators, including humidity efficiency, enthalpy moisture removal rate...

This paper introduces the dual-mode refrigeration system for ice storage air conditioning. A computational model relating to the exergy loss amount and loss rate is developed in each component of the refrigeration cycle loop. A case study is presented to demonstrate the applicability of the model developed. Exergy analysis results of the refrigeration system in ice storage operating mode are co...

A numerical investigation of the double-effect adsorption refrigeration cycle is examined in this manuscript. The proposed cycle is based on the cascading adsorption cycle, where condensation heat that is produced in the top cycle is utilized as the driving heat source for the bottom cycle. The results show that the double-effect cycle produces a higher coefficient of performance (COP) as compa...

The dual~controlled refrigeration system is devised to enhance the energy efficiency and basic performance of an indirect cooling household refrigerator/freezer. In order to alternately serve the fresh food and freezer compartment with a conventional simple refrigeration cycle, two capillary tubes and on/off valves are adopted. The air flow switching system, which is composed of two fans and da...

In the present work, the performances of improved two-stage multi inter-cooler trans- critical carbon dioxide (CO2) refrigeration cycles with ejector and internal heat exchanger have been examined. In the new improved cycles, an internal heat exchanger is append to the cycles. Also, second inter-cooler in improved cycles, cooled with the refrigeration of the cycle, so that in first c...

A cold room assisted vapor-compression refrigeration cycle is dynamically modeled in a year and optimized. Total annual cost (TACO) and coefficient of performance (COP) are selected as two objective functions. Both cold room and refrigeration cycle parameters are considered as design variables. Moreover, three working fluids included R22, R134a and R407c are examined. The optimum Pareto front r...