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首页> 外文期刊>Science and Technology for the Built Environment >Switch loss of a frost-free refrigerator-freezer with parallel dual-evaporator refrigeration system and its mitigation
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Switch loss of a frost-free refrigerator-freezer with parallel dual-evaporator refrigeration system and its mitigation

机译：具有平行双蒸发器制冷系统的无冰冷冰箱冷冻机的开关及其缓解

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摘要

The parallel dual-evaporator system has energy-saving potential in frost-free refrigerator-freezers, since it can provide proper evaporating temperature difference for the refrigerator and the freezer, respectively. However, energy loss is generated during the transition period of switches between refrigerating (R-) and freezing (F-) cycles in actual use. In this article, switch loss of a frost-free refrigerator-freezer with parallel dual-evaporator refrigeration system is studied experimentally. Results show that the transition process after F- to R-cycle switch takes 7.17 min and consists of three stages according to R-evaporator's feeding: short feeding (1.83 min), no feeding (2 min), and continuous feeding (3.34 min). The starvation in R-evaporator during the first two stages leads to switch loss for the refrigerator-freezer, by consuming 23.3% electric energy but yielding only 6.9% capacity for an entire R-cycle. The pump-down (P/D) action before R-cycles accelerates refrigerant's pumping from F-evaporator and feeding to R-evaporator, thus recovering part of the capacity loss. However, the introduction of P/D is not necessarily energy-efficient because P/D itself consumes considerable electric energy. By contrast, R- to F-cycle switch has little effect on refrigerator-freezer performance due to instant feeding. Dynamic simulation on the transition process will be provided in the future.
机译：平行双蒸发器系统在无冰冷的冰箱 - 冷冻机中具有节能电位，因为它可以分别为冰箱和冰箱提供适当的蒸发温差。然而，在实际使用中的制冷（R-）和冷冻（F-）循环之间的开关的过渡期间产生能量损失。在本文中，通过实验研究了具有平行双蒸发器制冷系统的无冰箱冷冻机的开关损耗。结果表明，根据R-蒸发器的喂料，F-To循环开关后的过渡过程需要7.17分钟，并由三个阶段组成：短喂食（1.83分钟），无需进料（2分钟）和连续喂养（3.34分钟） 。在前两个阶段的R蒸发器中饥饿导致冰箱冷冻机的损耗，通过消耗23.3％的电能，但为整个R周期产生6.9％的容量。在R循环之前的泵浦（P / D）动作加速了从F蒸发器泵送的制冷剂并进给R蒸发器，从而恢复部分容量损失。然而，P / D的引入不一定是节能，因为P / D本身消耗相当大的电能。相比之下，由于即时送入，R-To至F循环开关对冰箱冷冻机的性能几乎没有影响。将来将提供过渡过程的动态模拟。

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    Zhao Rijing; Huang Dong; Peng Xueyuan; Zhang Yaoji;

  • 作者单位

    Xi An Jiao Tong Univ Sch Energy &

    Power Engn 28 Xianning West Rd Xian 710049 Shaanxi Peoples R China;

    Xi An Jiao Tong Univ Sch Energy &

    Power Engn 28 Xianning West Rd Xian 710049 Shaanxi Peoples R China;

    Xi An Jiao Tong Univ Sch Energy &

    Power Engn 28 Xianning West Rd Xian 710049 Shaanxi Peoples R China;

    Xi An Jiao Tong Univ Sch Energy &

    Power Engn 28 Xianning West Rd Xian 710049 Shaanxi Peoples R China;

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  • 正文语种 eng
  • 中图分类 建筑基础科学;
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