Energies

Tri-generation is one of the most efficient ways for maximizing the utilization of 19 available energy. Utilization of waste heat (flue gases) liberated by the Al-Hamra gas 20 turbine power plant, UAE is analyzed in this research work for simultaneous production of 21 a) electricity by combining steam rankine cycle using heat recovery steam generator 22 (HRSG), b) clean water by air gap membrane distillation (AGMD) plant and c) cooling by 23 single stage vapor absorption chiller (VAC). The flue gases liberated from the gas turbine 24 power cycle is the prime source of energy for the tri-generation system. The heat 25 recovered from condenser of steam cycle and excess heat available at the flue gases are 26 utilized to drive cooling and desalination cycles which are optimized based on the cooling 27 energy demands of the villas. Economic and environmental benefits of the tri-generation 28 system in terms of cost savings and reduction in carbon emissions were analyzed. Energy 29 efficiency of about 82-85% is achieved by the tri-generation system compared to 50-52% 30 for combined cycles. Normalized carbon dioxide emission per MWh is reduced by 51.5% 31 by implementation of waste heat recovery tri-generation system. The tri-generation system 32 has a payback period of 1.38 years with cumulative net present value of $66 million over 33 the project life time. 34