The Conversion Page

Cryogen Consumption for Cool-Down

			Cryogen
			⁴He				H₂				N₂
		End-Temperature	4.2 K				20.4 K				77.3 K
		Start-Temperature	300 K		77 K		300K		77K		300K
		Metal	kg_cry kg_met	l_cry kg_met	kg_cry kg_met	l_cry kg_met	kg_cry kg_met	l_cry kg_met	kg_cry kg_met	l_cry kg_met	kg_cry kg_met	l_cry kg_met
Exploi- tation of	Evaporation Enthalpy	Aluminium	8.3	66.4	0.40	3.20	0.38	5.35	0.018	0.25	0.81	1.00
		Stainless Steel	4.2	33.6	0.18	1.44	0.20	2.82	0.0085	0.12	0.43	0.53
		Copper	3.9	31.2	0.27	2.16	0.17	2.39	0.012	0.17	0.37	0.46
	Evaporation Enthalpy and Vapour Enthalpy	Aluminium	0.2	1.60	0.028	0.22	0.075	1.07	0.0097	0.14	0.51	0.63
		Stainless Steel	0.1	0.80	0.013	0.10	0.037	0.53	0.0045	0.06	0.27	0.33
		Copper	0.1	0.80	0.02	0.16	0.037	0.53	0.0065	0.09	0.23	0.28

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22.09.99