In Saudi Arabia, air-conditioners ACs are responsible for 50% of electricity consumption due to hot weather conditions as well as the delay in implementing ACs standards. In this work, six used split-type and eight used window-type ACs that have ages from 3 to 32 years were tested according to American Society of Heating, Refrigerating and Air-Conditioning Engineers and Saudi Standard, Metrology and Quality Organization cooling test conditions and their performances were compared against new units that have 5.27 kW rated capacity. Test results show that coefficient of performance and cooling capacity of used split-type units compared to new one are 68% and 93%, respectively. For window-type, test results show that coefficient of performance and cooling capacity of used units compared to new one are 55% and 77%, respectively. The effect of replacing used compressor units with a new compressor was experimentally investigated. A model was developed using a commercially available software and was validated with experimental data. An economical map was developed to identify feasible ACs replacement regions. Practical application: Using standard methods this study experimentally quantifies energy savings when used split- and window-type units are replaced with new units. This will help HVAC and energy professionals develop recommendations regarding replacing existing units for a given power tariffs. Additionally, tests were conducted with replacing compressors in used air-conditioners, rather than replacing the entire unit, so as to assist in answering how much energy savings, CO2 and payback period can be achieved by simply replacing the compressors.

中文翻译：

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对二手分体式和窗式空调的更新进行节能潜力的测试和模拟

在沙特阿拉伯，由于天气炎热以及实施ACs标准的延迟，空调ACs的用电量占50％。在这项工作中，根据美国供热，制冷和空调工程师协会以及沙特标准，计量和质量组织的冷却测试条件，对6个使用了3至32年的二手分体式AC和8个使用了窗口型的AC进行了测试。并将其性能与额定容量为5.27 kW的新设备进行了比较。测试结果表明，与新拆机相比，二手拆机的性能系数和制冷量分别为68％和93％。对于窗户类型，测试结果表明，与新设备相比，二手设备的性能系数和冷却能力分别为55％和77％。实验研究了用新压缩机替换用过的压缩机单元的效果。使用可商购的软件开发了模型，并通过实验数据进行了验证。制定了经济地图，以确定可行的AC替换区域。实际应用：本研究使用标准方法实验性地量化了在用新的单元替换旧的拆分式和窗式单元时的节能量。这将帮助HVAC和能源专业人员制定有关在给定电价下替换现有设备的建议。此外，还进行了更换旧空调中的压缩机而不是更换整个单元的测试，以帮助回答仅更换压缩机即可节省多少能源，二氧化碳和投资回收期。