Table 7 Energy and exergy analysis of sCO₂ cycles (Simple, recuperator, recuperator with ORC, recuperator with MED).

From: 3E analysis of sCO₂ recuperator cycle with multi effect desalination and organic Rankine cycle to enhance environmental sustainability

Cycle type	Component	Fluid		Heat Transfer/Power (kw)	Thermodynamics First Law Efficiency	Exergy Transfer (kw) (Hot/ Cold Side)	Exergy destruction		Thermodynamics Second Law Efficiency
Cycle type	Component	Hot	Cold	Heat Transfer/Power (kw)	Thermodynamics First Law Efficiency	Exergy Transfer (kw) (Hot/ Cold Side)	(kw)	%	Thermodynamics Second Law Efficiency
Simple Cycle	sCO₂ Turbine	CO₂		9096	90%	9601	504.3	2.85	94.75
	sCO₂ Pump	CO₂		1868	80%	1534	333.5	1.88	82.14
	sCO₂ Condenser	CO₂	Air	33,538		7611	7611	43	14.46
	sCO₂ HRSG	Air	CO₂	40,767		15,768	9253	52.27	44.92
	Sum	-	-	-	17.73%	-	17701.8	100	48.01%
Recuperator Cycle	sCO₂ Turbine	CO₂		9878	90%	10,425	547.6	3.21	94.75
	sCO₂ Pump	CO₂		2028	80%	1666	362.1	2.12	82.14
	sCO₂ Recuperator	CO₂	CO₂	3501		1710 / 479.1	1231	7.20	28.02
	sCO₂ Condenser	CO₂	Air	32,917		6555	6555	38.38	16.48
	sCO₂ HRSG	Air	CO₂	40,767		16,545	8386	49.09	50.09
	Sum	-	-	-	19.26%	-	17,081	100	52.14%
Recuperator with ORC (R-123)	sCO₂ Turbine	CO₂		11,479	90%	12,116	636.4	3.40	94.75
	sCO₂ Pump	CO₂		2357	80%	1936	420.8	2.25	82.14
	sCO₂ Recuperator	CO₂	CO₂	21,918		8302 / 5223	3080	16.46	62.91
	sCO₂ Condenser	CO₂	Air	20,405		1303	1303	6.96	51.40
	sCO₂ HRSG	Air	CO₂	29,528		14,562	3496	18.68	74.91
	ORC Turbine	R-123		1288		1394	105.1	0.56	92.46
	ORC Pump	R-123		13.78		11.08	2.70	0.01	80.42
	ORC Condenser	R-123	Air	9964		614.8	614.8	3.28	53.19
	ORC HRSG	Air	R-123	11,239		1997	9052	48.38	69.61
	Sum	-	-	-	25.51%	-	18,710	100	68.82%
Recuperator with MED	sCO₂ Turbine	CO₂		11,479	90%	12,116	636.4	7.12	94.75
	sCO₂ Pump	CO₂		2357	80%	1936	420.8	4.71	82.14
	sCO₂ Recuperator	CO₂	CO₂	21,918		8302 / 5223	3080	34.47	62.91
	sCO₂ Condenser	CO₂	Air	20,405		1303	1303	14.58	51.40
	sCO₂ HRSG	Air	CO₂	29,528		14,562	3496	39.12	74.91
	Sum	-	-	-	30.89%	-	8935	100	73.07%

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