Title: Energy and exergy analyses of a novel combined heating, power and absorption-ejector refrigeration cycle driven by biomass fuel

Authors: Mohammad Amin Rokn Sharifi; Shahram Khalilarya

Addresses: Department of Mechanical Engineering, Urmia University of Technology, Urmia, West Azerbaijan 65178-36479, Iran ' Department of Mechanical Engineering, Urmia University, Urmia, West Azerbaijan 15311-57561, Iran

Abstract: In this paper, a new combined power, heating and refrigeration system is proposed, which combines the ammonia-water power/refrigeration system and steam ejector refrigeration system (SERS). This system was driven by biomass fuels and can produce both power and refrigeration simultaneously, besides according to the temperature of inlet streams into absorbers and rate of heat losses, these heat losses are used as floor heating. Moreover, high grade heat source is used in SERS; therefore, the entrainment ratio and efficiency of system are increased. The results show that the turbine inlet ammonia-water concentration, turbine outlet mass flow rate and turbine efficiency have effects on the turbine power output, refrigeration output, efficiency and exergy destruction in each component in the combined cycle.

Keywords: combined heating power and refrigeration; absorption-ejector refrigeration cycle; biofuels; energy analysis; exergy analysis; biomass; exergy efficiency; thermodynamic cycle; ammonia-water mixture; heat losses; floor heating; exergy destruction; turbine power.

DOI: 10.1504/IJEX.2016.075881

International Journal of Exergy, 2016 Vol.19 No.4, pp.481 - 499

Received: 03 Sep 2014
Accepted: 13 Mar 2015
Published online: 12 Apr 2016 *

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