The phase-down of hydrofluorocarbons and substitution with low global warming potential values are consequences the awareness about environmental impacts greenhouse gases. This theoretical study evaluated energy exergy performances impact three vapor compression system configurations operating hydrocarbons R290, R600a, R1270 as alternatives to R134a. refrigeration cycle investigated in this inc...

An organic Rankine cycle (ORC) is often used in waste heat recovery applications. These are typically small-scale applications where cycle thermal efficiency is low, and the benefits of traditional cycle enhancements (such as reheat stages or feed-water heaters) do not typically outweigh the costs required to implement them. An ORC with flooded expansion and internal heat regeneration is an alt...

The increase in energy and environmental problems from day to has led us use sustainable methods of optimizing systems. In this study, mass flow rates, pressure ratios, net powers thermodynamic calculations were performed by adding the integrated organic rankine cycle (ORC) waste heat a gas turbine (GT) on behalf innovative concepts industrial competition operating five different fluids (R123, ...

Abstract With the process of industrialization, a lot energy is consumed, and low-grade produced in process. To recover low grade heat from flue gas coal-fired power plants, organic Rankine cycle built improves utilization efficiency. Taking six working fluids, R245ca, R245fa, R123, R600, R601, R600a, as an example, referring to exhaust condition 300MW subcritical unit, analysed evaporation tem...

This paper presents the experimental and theoretical assessment of thermal behaviour a roll-bond evaporator in small-scale household refrigerator using refrigerant R600a as working fluid. The data were compared with general correlation employed to evaluate heat transfer convection (HTC) radiation vertical horizontal plates evaporator. is placed at top side refrigerator. To provide right boundar...

Bu teorik çalışmada; Ankara ilinin Gölbaşı ilçesinde konut ısıtması için kullanılacak hava, su ve toprak kaynaklı ısı pompalarının enerji ekserji analizi yapılmıştır. son on yıl içerisinde görülmüş olan en düşük hava sıcaklığı Meteoroloji Genel Müdürlüğünden, (Mogan Gölünde sıcaklık) ise Devlet Su İşleri Müdürlüğünden temin edilmiştir. Isı pompası çevriminde iş akışkanı olarak R134a, R407a, R41...

This study investigates the effect of varying test conditions including ambient temperature (19, 22, and 25 °C), mass charges R600a refrigerant (40, 50, 60, 70 g), concentrations TiO2 nanolubricant (0, 0.2 0.4 g/L) on performance a slightly modified 100g R134a domestic refrigeration system. The investigated parameters include evaporator air temperature, energy consumption, coefficient performan...