This paper presents the variation law of temperature in three-dimensional space, which is cooled by the refrigeration provided by the cold side of a semiconductor. The mathematical model of the temperature field of the semiconductor refrigeration device is described, and a numerical study on the temperature profile in a semiconductor refrigeration device was carried out using this model. The pr...

A combined refrigeration and power cycle, which uses ammonia-water as the working fluid, is proposed by combining Rankine and vapour absorption cycles with an advantage of varying refrigeration capacity to power output ratio. The study investigates the usage of low temperature heat sources for the cycle operation. Results of parametric analysis are presented, which show the scope for optimizati...

Aberrant false-positive reactions in negative-controls during ELISA testing for Clostridium difficile indicated the potential for false-diagnoses. Experiments with 96-well products showed a maximum peak of false-positive immunoassay reactions with the provided negative-control reagents after 5 refrigeration-to-room temperature cycles (P < 0.001), decreasing thereafter with additional refrigerat...

The operation of many the engineering systems that are necessary for functioning a detached residential building depends on specific sources alternative energy, use which can significantly reduce consumption traditional fossil energy resources. A review scientific works devoted to using is given. Several schemes power equipment have been developed obtain thermal and electrical supplied isolated...

To solve the problem of energy crisis in today’s world, conservation is more and get attention people, heat exchanger occupies an important place field saving, however, because a traditional energy-intensive heavy industry, one most widely used equipment it as preheating, mainly process waste recovery, refrigeration equipment, made outstanding contributions to saving. In this paper, plate resea...

Thermodynamic data on environmental refrigerants have attracted considerable interest in the optimization and design of heat compressors, exchangers and other refrigeration equipment. In this study, An optimization algorithm was used to obtain the constant parameters of the new empirical model by fitting them to the source databank. The model was used to calculate the constant coefficients of t...

The purpose of this research is to investigate thermoeconomic optimization and exergy analysis of transcritical CO2 refrigeration cycle with an ejector. After modeling thermodynamic equations of elements and considering optimization parameters of emerging temperature of gas of cooler (Tgc) , emerging pressure of cooler's gas (Pgc) , and eva...

Abstract The paper seeks the optimal configuration of equipment capable generating heat and cold. For generation two products, for first time it is considered a coupled system pump refrigeration system. Waste from an industrial process used as source cycle. system, carbon dioxide working agent, agent R152a. In order to identify malfunctions at level each device process, exergy analysis used, wh...