Development of artificial permafrost storage and the annual fluctuation

我们于1987年12月在带广大学开发了一个人工冻土储存的模型工厂。从那时起，在冷藏室的温度和湿度的波动和冻土中的温度变化进行了调查，测量土壤温度和所产生的冻土层的情况。对马铃薯、山药、牛蒡等蔬菜贮藏过程中的品质变化进行了调查和检测。虽然这种储存系统被证明可以储存蔬菜，但也留下了一些问题。由于热管的冷却效果变得太大，在严冬（1月至5月），室温降至冰点以下。为解决这一问题，对108根热管冷凝段的翅片进行了布片覆盖，结果表明，这种做法降低了热管的冷却效果。由于热二极管效应，热管的工作自动停止 关于我们 自4月起生效，房间墙壁上安装了自动喷水系统，如果室温低于冰点，该系统就会启动，以防止蔬菜死亡。倒出来的水在房间里变成了冰层，地板上的许多冰在储存的蔬菜中保持凉爽。然后在今年的室温保持冷到2.5摄氏度在最温暖的月份，8月比4.0摄氏度在去年。最重要的是保持新鲜的存储蔬菜的食品存储系统，我们证明了存储能力的土豆山药，牛蒡和胡萝卜，他们有很好的商业价值。本年度将新贮藏物-玫瑰、郁金香和阴香草的保鲜效果也达到了3周以上，说明这种人工冻土贮藏系统是一种有效的蔬菜和花卉保鲜系统。少

We had developed a mo del plant for the artificial permafrost storage at Obihiro University in December, 1987. Since then, the fluctuation of the temperatures and humidity in cold room and the changes of temperatures in frozen ground has been investigated, measuring the soil temperature and the situation of the created frozen ground layer. The qualitative changes of the stored vegetables(mainly, potatoes, Chinese yam, burdock)were investigated and examined. Although this storage system was prove possible to stock the vegetables, a few problems were left. As the cooling effect of heat pipes became too great, the room temperature dropped below the freezing point during the severe winter(from January to May). In order to settle this problem, the fins of the condensative section on 108 pieces of heat pipes was covered with cloth sheets and consequently this operation proved that the cooling effect was reduced. The worldng of heat pipe was stopped automatically owing to the thermal diode ef … More fect since April.The automatic water pouring system was applied on the room wall and if the room temperature became below the freezing point, this system was operated to prevent the vegetables from killing. And the poured water turned ice sheet in the room and much ice on the floor kept cool in the stocked vegetables. Then room temperature in this year was kept colder to 2.5ﾟC in the warmest month, August than 4.0ﾟC in last year.The most important thing is to keep the freshness of the stored vegetables for the food storage system, we proved the ability for store potatoes Chinese yam, burdock and carrot, and they have well worth commercial. In this year, the new stored matter, flesh flower was stocked in the artificial permafrost storage and it was found that chrysanthemum, lily, carnation and statice were keep fresh during one month. Also roses, tulips and haze grass were found to keep fresh to tree weeks.Thus, we concluded that this artificial permafrost storage was profitable system to keep the vegetables an flowers fresh during a long period. Less