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Aviation History
1948
1948 - 0305.PDF
the return flow is directed into a partitioned corner of each tank divided from the main capacity by a weir. Cold brine for admixture is taken from the main body of the tank, and this abstraction is compensated by a proportion of the returned brine flowing over the weir into the cold brine. The latter is kept cold by the ammonia refrigera- tion plant, and the flow sequence is from tank through a heat excharger (one for each tank) and back at a rate of 350 gall/mia. The cooling is achieved by the ammonia absorbing the latent heat from the brine and giving it np to water, which is expended, with a consequent drop in temperature of the brine. The capacity of the cooling plant is 30,000,000 B.Th.U. per 24 hours, which repre- sents the cooling required for about three hours' continuous tunnel-running at full load. Air admitted to the tunnel, including the constant delivery of leak-compensating air, is dried after leaving the compressors, by circulation through three brine coolers in
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