NTU Method Heat exchanger calculation

	A	B	C	D	H
1	8	NTU method for calculating heat exchangers
2		reference	http://en.wikipedia.org/wiki/NTU_method
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5			Inputs
6	U	Heat exchanger area	156.00	m2
7	A	heat transfer coefficient	5	kW
8		Heat capacity of fluid	4.20	kJ
9		Cold flow	5.550	l/s
10		Warm flow	0.277	l/s
11	Th,i	Cold inlet temp	7	C
12	Tc,i	Warm inlet Temp	14	C
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15		dT	7
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17	Ch	Heat capacity Rate Hot	1.1634
18	Cc	Heat capacity Rate Cold	23.31
19	Cmin	Heat capacity Rate Min	1.1634
20	Cmax	Heat capacity Rate Max	23.31
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22	Qmax	max theoretical heating duty	8.1438
23	Cr	heat capacity ratio	0.04990990991		1.00
24	NTU	Number of transfer units	670.45		1.00
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26			Counter flow	Parallell flow
27			0.00
28			1.00
29			1.00
30	E	Effectiveness	1.00	0.95
31	q	Heating duty	8.14	7.76
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34	Th,o	hot side out	7.00	7.33
35	Tc,0	cold side out	7.35	7.33
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