(JoRACHV)
Journal of
Refrigeration Air Conditioning Heating & Ventilation May - August 2014
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Dr. Lev Bulat Head of Department Electrical & Electronic Engineering National Research University ITMO ,St. Petersburg, Russia.
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Dr. Ramjee Repaka Assistant Professor, School of Mechanical Materials and Energy Engineering, IIT Ropar,India.
Mr. Rajesh V.R. Assistant Professor, Mechanical Engineering, Amrita School of Engineering , Coimbatore Campus,Tamilnadu, India.
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Dr. Sanjeev Anand Assistant Professor, School of Energy Management, Shri Mata Vaishno Devi University Katra, J & K, India.
Dr. Shailendra Kumar Shukla Associate Professor Mechanical Engineering Department IIT Banaras Hindu University, India.
Dr. Tanweer Hussain Associate Professor, Dept. of Mechanical Engineering , Mehran University of Engineering and Technology, Pakistan.
Director's Desk
STM JOURNALS
I take the privilege to present the print version for the Volume 1 Issue (2) of Journal of Refrigeration, Air Conditioning, Heating and Ventilation. The intension of JoRACHV is to create an atmosphere that stimulates creativeness, research and growth in the area of Refrigeration, Air Conditioning, Heating and Ventilation. The development and growth of the mankind is the consequence of brilliant Research done by eminent Scientists and Engineers in every field. JoRACHV provides an outlet for Research findings and reviews in areas of Refrigeration, Air Conditioning, Heating and Ventilation found to be relevant for National and International recent developments & research initiative. The aim and scope of the Journal is to provide an academic medium and an important reference for the advancement and dissemination of Research results that support high level learning, teaching and research in the domain of Refrigeration, Air Conditioning, Heating and Ventilation. Finally, and Authors for their continued support and invaluable contributions and suggestions in the form of authoring I express my sincere gratitude and thanks to our Editorial/ Reviewer board write ups/ reviewing and providing constructive comments for the advancement of the journals. With regards to their due continuous support and co-operation, we have been able to publish quality Research/Reviews findings for our customers base. I hope you will enjoy reading this issue and we welcome your feedback on any aspect of the Journal.
Dr. Archana Mehrotra Director STM Journals
Journal of Refrigeration, Air Conditioning, Heating and Ventilation
Contents
1. Studying the Effects of Reheat on R134A Cycle Performance using Industrial Air-Conditioning Training Equipment K. Anderson, C. McNamara
1
2. Thermodynamic Design Data of NH3-LiNO3 Absorption Heat Pump Systems for Simultaneous Cooling and Heating using ANN Approach Dheerendra Vikram Singh, Govind Maheshwari, Manoj Modi
7
3. First Law Analysis of Adsorption Cooling System Jaspalsinh B Dabhi, Ajitkumar N Shukla
14
4. Mathematical Model of a Silica Gel Water Adsorption Refrigeration System at Adsorption Equilibrium Anirban Sur, Randip K. Das
24
5. An Exergetic based Assessment of Biogas as an Energy Source in a Hybrid Refrigeration System A. Gupta, Y. Anand, S. Anand, S. K. Tyagi
31
Journal of Refrigeration, Air Conditioning, Heating and Ventilation Volume 1, Issue 2 www.stmjournals.com
Studying the Effects of Reheat on R134A Cycle Performance using Industrial Air-Conditioning Training Equipment K. Anderson*, C. McNamara Mechanical Engineering Department, California State Polytechnic University at Pomona, USA Abstract This paper presents an apparatus-based experiment for teaching air conditioning and refrigeration in undergraduate engineering hands-on based learning curricula. Results for an R134A based refrigeration and air conditioning performance are shown in this paper illustrating the effects of re-heat on the COP of the cycle as well as the use on a LabView interface to extract test data. The primary use of this equipment is to show various “what-if” scenarios. In the present case, the effects of reheat on R134A cycle performance are illustrated. The COP is found to be 2.9 corresponding ton, an EER = 10 BTU/W-hr and the sensible heat ratio for the psychrometric process is 80%.
Keywords: Air conditioning, LabView, reheat, R134A
JoRACHV (2014)© STM Journals 2014. All Rights Reserved
Journal of Refrigeration, Air Conditioning, Heating and Ventilation Volume 1, Issue 2 www.stmjournals.com
Thermodynamic Design Data of NH3-LiNO3 Absorption Heat Pump Systems for Simultaneous Cooling and Heating using ANN Approach Dheerendra Vikram Singh1*, Govind Maheshwari2, Manoj Modi1 1
Shri Vaishnav Institute of Technology & Science, Indore, India Institute of Engineering & Technology – DAVV, Indore, India
2
Abstract The aim of this study is to train neural network which predicts thermodynamic design data without involving role of thermodynamic properties, temperature concentration complex relationship and formula of coefficient of performance. Authors have presented values of weights and bias obtained from the trained ANN through which one can formulate mathematical equations for predicting thermodynamic design data. Authors have achieved coefficient of multiple determinations R2 as 1, 1, 0.99999 for solution concentration in absorber and generator and enthalpy-based coefficient of performance respectively which are quite satisfactory to validate ANN approach for this study.
Keywords: Absorption refrigeration system, ANN, thermodynamic design data, solution concentration, Ammonia-LiNO3
JoRACHV (2014) Š STM Journals 2014. All Rights Reserved
Journal of Refrigeration, Air Conditioning, Heating and Ventilation Volume 1, Issue 2 www.stmjournals.com
First Law Analysis of Adsorption Cooling System Jaspalsinh B Dabhi*, Ajitkumar N Shukla School of Technology, PDPU, Gandhinagar, India Abstract Steady state thermodynamic differential analysis is developed for the adsorption-based cooling systems. The introduced thermodynamic model represents the behaviour of adsorption cooling systems, based on a precise, reasonable, and clear fundamental approach. The energy conservation principle is used to analyze components and processes in the system. The dynamics of adsorption is expressed using Dubinin-Astakhov adsorption equilibrium model. Energy interactions are evaluated to determine the theoretical performance and the operating parameters of the system. The effect of pressure and temperature on the adsorption/desorption capacity of silica gel is presented as candidate. The case studied developed reports cooling system build using Silica gelwater as the working pair.
Keywords: Sorption Cooling, Silica gel, energy balance, thermal cooling
JoRACHV (2014)Š STM Journals 2014. All Rights Reserved
Journal of Refrigeration, Air Conditioning, Heating and Ventilation Volume 1, Issue 2 www.stmjournals.com
Mathematical Model of a Silica Gel Water Adsorption Refrigeration System at Adsorption Equilibrium Anirban Sur1, Randip K. Das2* 1
Department of Mechanical Engineering, Inderprastha Engineering College, Sahibabad, U.P., India 2 Department of Mechanical Engg. & Mining Machinery Engg, Indian School of Mines, Dhanbad Jharkhand, India
Abstract CFC (ChloroFluoroCarbon) and HCFC (HydroFluoroCarbon) refrigerants, which are used for vapour compression refrigeration cycles cause serious environment problems. So research is going on solar refrigeration (producing cooling effect using solar energy is a promising way to achieve sustainable development, since the energy used is free and not harmful for the environment) and also used for environment friendly refrigerants. In this paper, heat and mass transfer analysis of adsorption refrigeration system is done in which solar energy as well as environment friendly refrigerant is used. The proposed adsorption refrigeration system is based on silica-gel–water adsorption pair. The heat source is waste heat from diesel engine and solar energy simultaneously. The performance of the proposed cycle is evaluated with the help of the mathematical model at equilibrium condition, is compared with the performance of the basic two-bed adsorption refrigeration cycle. This makes the system a continuous process. It is seen that the cooling effect as well as COP of the proposed cycle is superior to the basic cycle. The system is developed for cold storage in rural area where availability of electricity is very less.
Keywords: Adsorption, Adsorbent, Refrigerant, Adsorbent bed, Adsorbate, Solar heat
JoRACHV (2014) Š STM Journals 2014. All Rights Reserved
Journal of Refrigeration, Air Conditioning, Heating and Ventilation Volume 1, Issue 2 www.stmjournals.com
An Exergetic based Assessment of Biogas as an Energy Source in a Hybrid Refrigeration System A. Gupta1, Y. Anand1, S. Anand1*, S. K. Tyagi2 1
School of Energy Management, Shri Mata Vaishno Devi University, Katra, J & K, India Sardar Swaran Singh National Institute of Renewable Energy, Kapurthala, Punjab, India
2
Abstract The analysis of biogas operated Ammonia-Water vapor compression absorption (hybrid) refrigeration system was carried out based on computational model being developed and the thermodynamic properties of working fluids have been used from the computer code. The variation of performance parameters such as exergy loss, COPCOOLING, COPHEATING and Exergy efficiency are studied with varying generator temperature, evaporator temperature, condenser and absorber temperature. The results indicate that maximum COP cooling as well COP heating value are found to be at generator temperature of 80 oC for the same variation in the generator temperature from 80 oC –135 oC. The effect of the varying cooling capacity on the exergy loss in different components as well as exergy efficiency is also studied in the analysis of the hybrid system which revealed the maximum exergy loss is found in the generator which goes on increasing with an increase in the cooling capacity of the system. Keywords: Biogas, Boiler, Hybrid system, Compressor, COP, Exergy
JoRACHV (2014)Š STM Journals 2014. All Rights Reserved