Abstract

Indoor environment control strategies in small buildings are simply considered, such as achieving the indoor temperature control through ON/OFF cycling the compressor of a direct expansion (DX) air conditioning (A/C) system, leaving the indoor humidity uncontrolled. In some areas, the large latent cooling load will lead to an unstable and high indoor humidity, resulting in deteriorating thermal comfort, indoor air quality and energy efficiency, suggesting that an actively controlled humidity is indispensable. The existing temperature and humidity independent control (THIC) methods are too complicated to be suitable for applying in small buildings. Therefore, the authors established a water chiller which can be applied in residential buildings for THIC by using a dual-evaporation-temperature compressor. A prototype was built and experimentally tested. Results showed that in the varying summer condition, the high and low water supplying temperatures were maintained around 18.8°C and 7.8°C, respectively, suggesting that this novel chiller could provide chilled water of two different temperatures for THIC. Furthermore, the energy efficiency ratios (EER) of the compressor was 3.5, which was comparable to those conventional DX A/C systems or chillers of the same size. Therefore, this novel chiller based on dual evaporation temperatures was feasible.

中文翻译：

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家用双蒸发温度冷水机组的实验研究

摘要

简单考虑小型建筑的室内环境控制策略，例如通过开/关循环直接膨胀（DX）空调（A/C）系统的压缩机来实现室内温度控制，而室内湿度不受控制。在某些地区，较大的潜冷负荷会导致室内湿度不稳定且较高，从而导致热舒适性、室内空气质量和能源效率恶化，这表明主动控制湿度是必不可少的。现有的温湿度独立控制(THIC)方法过于复杂，不适合在小型建筑中应用。因此，作者利用双蒸发温度压缩机，研制了一种适用于THIC住宅建筑的冷水机。建造了原型并进行了实验测试。结果表明，在不同的夏季条件下，高、低供水温度分别维持在18.8℃和7.8℃左右，表明该新型冷水机可以为THIC提供两种不同温度的冷冻水。此外，压缩机的能效比（EER）为3.5，与相同尺寸的传统DX空调系统或冷水机组相当。因此，这种基于双蒸发温度的新型冷水机是可行的。压缩机的能效比（EER）为3.5，与相同尺寸的传统DX空调系统或冷水机组相当。因此，这种基于双蒸发温度的新型冷水机是可行的。压缩机的能效比（EER）为3.5，与相同尺寸的传统DX空调系统或冷水机组相当。因此，这种基于双蒸发温度的新型冷水机是可行的。