INTERNATIONAL JOURNAL OF SCIENTIFIC & TECHNOLOGY RESEARCH VOLUME 6, ISSUE 03, MARCH 2017 ISSN 2277-8616 21 IJSTR©2017 www.ijstr.org Simulation Of Aqua-Ammonia Refrigeration System Using The Cape-Open To Cape-Open (COCO) Simulator Janavi Gohil, Sarthak Doshi, Dhairya Chheda, Arvind Prasad ABSTRACT: In this paper we have simulated a flow sheet of aqua ammonia refrigeration system using Cape Open simulator. The main aim of writing this paper is to compare the results obtained from thermodynamic simulation of aqua ammonia refrigeration system and the results obtained from the flow sheet simulation in Cape-Open to Cape-Open (COCO) simulator. The corresponding COP values obtained from both the sources are calculated and compared. With the error being very minute; the calculations using simulator prove to be more efficient and timesaving when compared to the results obtained by calculations done using tedious thermodynamic simulations and constant mass balance for different process conditions. Keywords: absorption refrigeration, ammonia-water, simulator, process conditions, thermodynamic simulation. ———————————————————— 1. INTRODUCTION: Refrigeration is an art of producing and maintaining the temperature is space below atmospheric temperature. American Society of Refrigeration Engineer defines refrigeration as ―The science of providing and maintaining temperature below that of surrounding atmosphere‖[1]. The equipment employed to maintain the system at low temperature is termed as refrigeration system[2]. Aqua Ammonia refrigeration system being one of the oldest systems was invented by Ferdinand Carre in 1860 [3]. In this work, simulation of Aqua Ammonia refrigeration system is carried out using the Cape-Open to Cape-Open simulator (COCO). It was found that the results are in agreement with those published in the work done by Satyabhama and Ashok Babu [4]. Raghuvanshi and Maheshwari presented empirical relations for evaluating the characteristics and performance of a single stage Ammonia Water (NH3-H2O) vapour absorption system along with the simulation and examination of varying thermodynamic parameters using MATLAB 7.0.1 [5]. Alvares and Trepp using 13 Aqua Ammonia refrigeration (AAR) cycles, performed analysis on an Aqua-Ammonia refrigeration cycle coupled with solar water heating systems using Compound Parabolic Concentrator (CPC) [5]. Bangotra and Mahajan designed a 3TR system and calculated COP using first and second law of thermodynamics. The enthalpies were calculated using enthalpy concentration diagram of Aqua-Ammonia system [2]. Satyabhama and Ashok Babu carried out a thermodynamic simulation for investigating the the effects of different operating variables on the performance analysis of vapour absorption cycle [4]. Sun , Liuli proposed an improved configuration based on connected power and absorption cooling cogeneration using Aspen plus where in the correlations were solved using Peng Robinson equation [6]. Selim and Elsayed presented a mathematical model of a packed bed absorber for Aqua-Ammonia absorption refrigeration system by developing a computer program wherein the governing equations were solved using Runge - Kutta integration method and Nachtschiem-swigert iteration technique [7]. Martinez , David , Bruno carried out the development and application of the data reconciliation technique to analyse the performance of absorption chiller using FINCON – a MATLAB solver [8]. Zavaleta and Simoes , using Ponchon Savarit method , presented analysis of a segmented weir sieve-tray distillation column of A 5TR Aqua-Ammonia absorption refrigeration cycle [9]. Cai, Sen and Paolucci developed a dynamic model of a single effect absorption cycle using Redlich – Kwong equation of state [10]. Modelling and Thermodynamic simulation of an ammonia water double effect-double generator absorption chiller was carried out by Ezzine , Mejbri and Barhoumi using CONLES which is available as a FORTRAN code [11]. White and O’Neil proposed a new Ammonia-Water absorption refrigeration cycle, wherein the evaporator blowdown stream is recycled to the rectification section of the distillation column to provide reflux. This was done using PROCESS computer simulation package and the equations were solved using the model proposed by Ziegler and Trepp [12]. In this work we have simulated aqua ammonia refrigeration system using an Open source (GPL) simulator i.e Cape-Open to Cape-Open (COCO) simulator [13]. We validated the simulator and found the COP of 1TR system. 2. ABSORPTION REFRIGERATION SYSTEM: A Vapour Absorption refrigeration (VAR) system is similar to a Vapour compression refrigeration (VCR) system. In ___________________  Janavi Gohil is pursuing bachelor’s degree program in Chemical engineering in Dwarkadas J.Sanghvi college of Engineering. E-mail: janavi.gohil28@gmail.com  Sarthak Doshi is pursuing bachelor’s degree program in Chemical engineering in Dwarkadas J.Sanghvi college of Engineering. E-mail: sarthakdoshi07@gmail.com  DhairyaChheda is pursuing bachelor’s degree program in Chemical engineering in Dwarkadas J.Sanghvi college of Engineering. E-mail: dhaichheda95@gmail.com  Arvind Prasad is an assistant professor at Dwarkadas J.Sanghvi college of Engineering. His area of interest is Process Simulation. E-mail: arvind.prasad@djsce.ac.in