K. P. Bhangale
Bio: K. P. Bhangale is an academic researcher. The author has contributed to research in topics: Capillary action & Vapor-compression refrigeration. The author has an hindex of 1, co-authored 1 publications receiving 1 citations.
28 Mar 2021
TL;DR: In this paper, the effect of capillary tube on the performance of VCR system is discussed, and the results of straight and helical type of Capillary tubes are studied.
Abstract: Vapor Compression refrigeration system is most commonly available system in day to day life from home to malls in India. It is necessary to improve the performance of system. The study is mainly focus on the improvement of performance. Out of different parameter, the literature review covers the effect of capillary tube on the performance of system. It covers the experimental and numerical study on effect of capillary tube. The results of straight and helical type of capillary tubes are studied. The study also covers the CFD analysis for the different length and diameters of capillary tubes and find out the optimize size.
TL;DR: In this article, the effects of the relevant parameters on the flow characteristic of R134a and R-22 flowing through adiabatic helical capillary tubes were experimentally studied.
Abstract: Capillary tubes are used as expansion device in low capacity refrigeration machines like domestic refrigerators and window type air conditioners. The advantages of the capillary tube over other expansion devices are simple, inexpensive and cause compressor to start at low torque as the pressure across the capillary tube equalize during the off-cycle. The flow characteristics of refrigerants through capillary tubes have been studied extensively in past six decades, both experimentally and analytically, most of these studies mainly focused on straight capillary tubes. In this thesis, the effects of the relevant parameters on the flow characteristic of R134a and R-22 flowing through adiabatic helical capillary tubes were experimentally studied. The capillary tubes' diameter, coil diameter, and parameters relating to flow conditions such as inlet pressures and degree of sub cooling were the major parameters investigated. In this thesis, the CFD analysis is to determine the heat transfer rate, pressure drop, velocity, mass flow rate and heat transfer coefficient for the fluids R134A and R-22 with different tube and coil diameters. Thermal analysis is to determine the temperature distribution and heat flux for copper and aluminum as tube materials.3D modeling is done pro-engineer and analysis is done in ANSYS software.
TL;DR: In this article , the effect of different dimensions of capillary tube on COP, R.E. and power input of water chiller and to find the optimum dimensions for which COP of the system is maximum using experimental results.
Abstract: Capillary tube is most widely used expansion device in the refrigeration system having small applications. It is made up of copper tube having small diameter (0.5–5 mm) & very long length (0.5–5 m). The main aim of this research is to study the effect of different dimensions of capillary tube on COP, R.E. & Power input of water chiller and to find the optimum dimensions of capillary tube for which COP of the system is maximum using experimental results. For this, standard experimental test rig having 2 TR refrigeration capacity was developed in order to perform experimentation on different sets of capillary tubes. The result obtained through this experimentation is used to study the effect of changing dimensions of capillary tube on various performance parameters & to find out the optimum dimensions of capillary tube for 2TR water chiller having R22 & R407C as refrigerants. Also, comparative study between results obtained for R22 & R407C is done. The result obtained through this study is useful to design a capillary tube for 2 TR water chiller (having R22 & R407C as refrigerants) for which performance of chiller is maximum for a given application. As R407C refrigerant is direct substitute for R22, so comparative study will be useful to select and modify the dimensions of capillary tube while replacing the refrigerant with substitute one.