Refrigeration applications is responsible for approximately 17% of the total electricity and around 8% greenhouse gas emissions. This study presents a comparative life cycle assessment between two refrigeration systems, first operating with traditional fluid second natural refrigerant. The analysis was performed in accordance international standards ISO 14040/14044 adopted attributional approac...

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...

abstract: minimizing the work consumed in refrigeration system is the most effective measure to reduce the cost of products in sub-ambient chemical processes. the introduction of mixed working fluids into refrigeration system in place of pure working fluids is a recent advancement applied in the field. due to the lack of systematic design method for mixed refrigerant cycle (mrc), conventional a...

This paper presents two solutions to cascade the doubly-fed induction machines in power generator systems. The first solution is a traditional one with control circuit located on stator-side. second new rotor-side. After analysis and evaluation, it shown that rotor side has advantages over Therefore, authors chose which study, analyze in-depth run simulation. results show proposed very good qua...

Low-temperature refrigeration is of crucial importance in fundamental research of condensed matter physics, because the investigations of fascinating quantum phenomena, such as superconductivity, superfluidity, and quantum criticality, often require refrigeration down to very low temperatures. Currently, cryogenic refrigerators with (3)He gas are widely used for cooling below 1 K. However, usag...

The model of a side information"vending machine"accounts for scenarios in which acquiring side information is costly and thus should be done efficiently. In this paper, the three-node cascade source coding problem is studied under the assumption that a side information vending machine is available either at the intermediate or at the end node. In both cases, a single-letter characterization of ...