THERMODYNAMICS and ECONOMICAL ANALYSIS OF GEOTHERMAL ASSISTED ABSORPTION REFRIGERATION SYSTEM: SIMAV CASE STUDY


TUĞCU A., ARSLAN O., KÖSE R., YAMANKARADENİZ N.

ISI BILIMI VE TEKNIGI DERGISI-JOURNAL OF THERMAL SCIENCE AND TECHNOLOGY, vol.36, no.1, pp.143-159, 2016 (Journal Indexed in SCI) identifier

  • Publication Type: Article / Article
  • Volume: 36 Issue: 1
  • Publication Date: 2016
  • Title of Journal : ISI BILIMI VE TEKNIGI DERGISI-JOURNAL OF THERMAL SCIENCE AND TECHNOLOGY
  • Page Numbers: pp.143-159
  • Keywords: Absorption Refrigeration System, Ammonia-Water, Energy and Exergy Analysis, Economic Analysis, Geothermal Energy, Optimization, LITHIUM BROMIDE, EXERGY ANALYSIS, THERMOECONOMIC OPTIMIZATION, AMMONIA-WATER, ENERGY

Abstract

In this study, the single stage geothermal energy assisted absorption refrigeration system, working with ammonia-water solution, was optimized in the view of different solution concentrations and design parameters. Depending on parametric evaluation, a number of 3360 designs were made. In these frameworks, changes of the system performance by the effect of generator, evaporator, condenser and absorber temperature were investigated. The capacities of generator, evaporator, condenser, absorber, heat exchanger, pump, coefficient of performance (COP) and exergy efficiency were calculated by energy and exergy analysis. In the calculations, different ratios of NH3-H2O solution were taken into account as 46% NH3 - 54% H2O, 40% NH3 - 60% H2O, 30% NH3 - 70% H2O, 20% NH3 - 80% H2O. In further, an economical evaluation based on net present value analysis (NPV) was made for each design. In this purpose, the economic life of the system was taken as 20 years and the refrigerated products were chosen as grape, apple and quince taking the regional situations into consideration. The optimum design was determined using the results of NPV analysis. For the optimum design, COP of the system was determined as 0,5722 while the exergy efficiency was calculated as 0,6201. In this conditions, NPV values were calculated as 3.912.757,74 TL, 13.922.203,39 TL and 59.803.554,33 TL for the products of quince, apple and grape, respectively. According to these results, it was found that absorption refrigeration system assisted by Simav geothermal resources was respectable for investment.