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Freezing without frontiers

机译：无国界冻结

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摘要

Cryogenic freezing is here to stay, because consumers want the product quality, novelty and low prices that cryogenics make possible. Cryogenics can improve the quality of frozen food, and make novel products that are not possible with conventional freezing techniques. Cryogenic refrigeration uses expandable gaseous refrigerants at temperatures generally below -80℃. Perhaps surprisingly to engineers brought up in the tradition of mechanical refrigeration, cryogenic freezing is often the cheaper method, especially under the volatile business conditions of the frozen food market. But despite these advantages, many refrigeration engineers still find it difficult to see cryogenics as "proper refrigeration". By explaining the principles of cryogenic freezing and the research that is being done on topics such as closed-cycle air refrigeration, this paper emphasises the important contribution of cryogenics to the whole field of refrigeration. If we can recognise when to use mechanical refrigeration and when to turn to cryogenics, we will be able to "freeze without frontiers". We will keep our customers happy, and we will ensure a prosperous future in the growing market for frozen food.
机译：低温冷冻将继续存在，因为消费者希望低温冷冻机能够提供产品质量，新颖性和低廉的价格。低温杀菌剂可以提高冷冻食品的质量，并制造出常规冷冻技术无法实现的新颖产品。低温制冷使用温度通常低于-80℃的可膨胀气体制冷剂。对于在机械制冷传统中成长起来的工程师而言，也许令人惊讶的是，低温冷冻通常是更便宜的方法，尤其是在冷冻食品市场的商业环境动荡的情况下。尽管有这些优点，但许多制冷工程师仍然发现很难将低温视为“适当的制冷”。通过解释低温冷冻的原理以及在诸如闭环空气制冷等主题上的研究，本文强调了低温对整个制冷领域的重要贡献。如果我们能够识别何时使用机械制冷以及何时使用低温制冷，我们将能够“无国界冻结”。我们将使我们的客户满意，并确保不断增长的冷冻食品市场的繁荣发展。

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