Book - Advance Energy Systems, 2ed, Khartchenko 13.4 A trigeneration plant (refer to Figure 13.8b) based on an SOFC fuel cellstack is employed for power and useful heat supply of an industrial complexunder the following operating conditions:• Power demand is Pa = 230 kW, load duration is t = 12 h/dayRate of process heat production is Q = 88 kW, t, = 12 h/dayRate of heat production for air conditioning unit (absorption chillers) isQac = 75 kW, TẠC = 12 h/dayElectrical efficiency of the SOFC fuel cell stack is na = 0.44Efficiencies of useful heat production for hot water and absorption AC,respectively, are N, = 0.85 and Nac = 0.74• Fuel is a restated natural gas with an LHV of 50 MJ/kgCalculate (i) the daily primary energy requirements, (ii) the overall effi-ciency of the trigeneration plant, and (iii) the plant daily fuel requirements.

Given: Pel = 230 kW tel = 12h/day = 43200 sec/day nel = 0.44 Qh = 88 kW th = 12h/day = = 43200…

13.4 A trigeneration plant (refer to Figure 13.8b) based on an SOFC fuel cell stack is employed for power and useful heat supply of an industrial complex under the following operating conditions: • Power demand is P = 230 kW, load duration is t = 12 h/day Rate of process heat production is Q = 88 kW, t, = 12 h/day Rate of heat production for air conditioning unit (absorption chillers) is Qxc = 75 kW, tc = 12 h/day Electrical efficiency of the SOFC fuel cell stack is Ny = 0.44 Efficiencies of useful heat production for hot water and absorption AC, respectively, are n, = 0.85 and 7ac= 0.74 Fuel is a restated natural gas with an LHV of 50 MJ/kg Calculate (i) the daily primary energy requirements, (ii) the overall effi- ciency of the trigeneration plant, and (iii) the plant daily fuel requirements.

13.4 A trigeneration plant (refer to Figure 13.8b) based on an SOFC fuel cell stack is employed for power and useful heat supply of an industrial complex under the following operating conditions: • Power demand is P = 230 kW, load duration is t = 12 h/day Rate of process heat production is Q = 88 kW, t, = 12 h/day Rate of heat production for air conditioning unit (absorption chillers) is Qxc = 75 kW, tc = 12 h/day Electrical efficiency of the SOFC fuel cell stack is Ny = 0.44 Efficiencies of useful heat production for hot water and absorption AC, respectively, are n, = 0.85 and 7ac= 0.74 Fuel is a restated natural gas with an LHV of 50 MJ/kg Calculate (i) the daily primary energy requirements, (ii) the overall effi- ciency of the trigeneration plant, and (iii) the plant daily fuel requirements.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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