Home / Current Issue / Paper 1702875
Performance Scrutiny of Domestic Refrigerator Using a Stepped Mini Orifice as A Capillary Tube Extension with Sio2 Nano Lubricant And R-290 Refrigerant
Subject area: Science,Engineering and Technology · Area of research: Refrigeration and Air conditioning, Nano fluids
Abstract
A stepped short tube orifice has been proposed as a replacement for the expansion mechanism in a residential refrigerator that runs on R-290. The present work is primarily concerned with the impacts of stepped short tube orifices on system characteristics such as net refrigeration effect, compressor effort, pull down time, and coefficient of performance. A stepped short tube orifice is made up of two short tube orifices linked serially and having varying sizes. It is used as an extension to the capillary tube in the refrigeration system. A stepped short tube orifice is built and fitted to a home refrigerator in this experiment. The experiments must be done on a home refrigerator equipped with a stepped short tube orifice, R-290 refrigerant, and a 0.5% weight SiO2 nanoparticle. Following the completion of all trials, the effects of the stepwise short tube orifice on a residential refrigerator were studied using comparison charts. The results indicate that the performance of the home refrigerator with stepped short tube orifice and SiO2 nano particle inclusion was much better than the domestic refrigerator without stepped short tube orifice
Keywords
stepped short tube orifice, R290 Refrigerant, Nano lubricant, Net refrigeration effect.
References
[1] B.C. Langley, Heat pump technology, Upper Saddle River, Prentice Hall, 2002.
[2] ASHRAE Handbook, HVAC Systems and Equipment, American Society of Heating, Refrigerating, and Air Conditioning Engineers, Atlanta, GA, 1996.
[3] D. Zhao, G. Ding, Y. Xu, et al., Development of a stepped capillary tube as a low-cost throttling device for a residential heat pump system, Int. J. Refrig. 42 (2014) 36–47.
[4] T. Liu, S. Wang, Y. Xu, et al., Experimental investigation of mass flow rate difference between forward flow and reverse flow of sub-cooled R-22 through stepped short tube orifices, Appl. Therm. Eng. 124 (2017) 1292– 1300.
[5] V.C. Mei, Short-tube Refrigerant-Flow Restrictors, Oak Ridge National Lab., TN (USA), 1982.
[6] D.A. Aaron, P.A. Domanski, Experimentation analysis and correlation of refrigerant-flow through short tube restrictors, ASHRAE Trans 96 (1) (1990) 729–742.
[7] Y. Kim, Two-phase Flow of HFC134a and HCFC22 Through Short Tube Orifices Ph.D. thesis, Texas A&M University, USA, 1993.
[8] Y. Kim, D.L. O’neal, Two-phase flow of R-22 through short-tube orifices, ASHRAE Trans. 100 (1) (1994) 323–334.
[9] Y. Kim, D.L. O’Neal, A comparison of critical flow models for estimating two-phase flow of HCFC22 and HFC134a through short tube orifices, Int. J. Re- frig. 18 (7) (1995) 447–455.
[10] S. Jin, T. Sung, T Seo, et al., Characteristics of R-123 two-phase flow through micro-scale short tube orifice for design of a small cooling system, Exp. Therm. Fluid Sci. 35 (7) (2011) 1484–1489.
How to cite this paper
@article{1702875,
author = {Bairi Levi Rakshith, Rapaka Jagadeesh, Dr. M.P. Rangaiah},
title = {Performance Scrutiny of Domestic Refrigerator Using a Stepped Mini Orifice as A Capillary Tube Extension with Sio2 Nano Lubricant And R-290 Refrigerant},
journal = {Iconic Research And Engineering Journals},
year = {2021},
volume = {5},
number = {1},
pages = {313-318},
issn = {2456-8880},
url = {https://www.irejournals.com/formatedpaper/1702875.pdf},
abstract = {A stepped short tube orifice has been proposed as a replacement for the expansion mechanism in a residential refrigerator that runs on R-290. The present work is primarily concerned with the impacts of stepped short tube orifices on system characteristics such as net refrigeration effect, compressor effort, pull down time, and coefficient of performance. A stepped short tube orifice is made up of two short tube orifices linked serially and having varying sizes. It is used as an extension to the capillary tube in the refrigeration system. A stepped short tube orifice is built and fitted to a home refrigerator in this experiment. The experiments must be done on a home refrigerator equipped with a stepped short tube orifice, R-290 refrigerant, and a 0.5% weight SiO2 nanoparticle. Following the completion of all trials, the effects of the stepwise short tube orifice on a residential refrigerator were studied using comparison charts. The results indicate that the performance of the home refrigerator with stepped short tube orifice and SiO2 nano particle inclusion was much better than the domestic refrigerator without stepped short tube orifice},
keywords = {stepped short tube orifice, R290 Refrigerant, Nano lubricant, Net refrigeration effect.},
month = {July},
}