Thermodynamic Analysis and Optimization of the Micro-CCHP System with a Biomass Heat Source

Halomoan Harahap, Tua and Candra, Oriza and A. Sabawi, Younis and Kamil Kareem, Ai and Shareef Mohsen, Karrar and Hussien Alawadi, Ahmed and Morovati, Reza and Mahamoud Mohamed, Ehab and Khan, Imran and Øivind Madsen, Dag (2023) Thermodynamic Analysis and Optimization of the Micro-CCHP System with a Biomass Heat Source. Sustainability, 15 (5).

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Abstract

In this article, new multiple-production systems based on the micro-combined cooling, heating and power (CCHP) cycle with biomass heat sources are presented. In this proposed system, absorption refrigeration cycle subsystems and a water softener system have been used to increase the efficiency of the basic cycle and reduce waste. Comprehensive thermodynamic modeling was carried out on the proposed system. The validation of subsystems and the optimization of the system via the genetic algorithm method was carried out using Engineering Equation Solver (EES) software. The results show that among the components of the system, the dehumidifier has the highest exergy destruction. The effect of the parameters of evaporator temperature 1, ammonia concentration, absorber temperature, heater temperature difference, generator 1 pressure and heat source temperature on the performance of the system was determined. Based on the parametric study, as the temperature of evaporator 1 increases, the energy efficiency of the system increases. The maximum values of the energy efficiency and exergy of the whole system in the range of heat source temperatures between 740 and 750 K are equal to 74.2% and 47.7%. The energy and exergy efficiencies of the system in the basic mode are equal to 70.68% and 44.32%, respectively, and in the optimization mode with the MOOD mode, they are 87.91 and 49.3, respectively.

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