[AC] 問﹕Heat Pump 係乜嚟？

答﹕

簡單嚟講就係同冷氣原理相同既嘢，但一頭攞熱之餘另一頭都攞凍嚟用

攞嚟既熱相對低能，每Loop一次升5-10℃, 要Loop多幾次先做到高能既熱。

COP不俗原因係凍同熱都同時用到﹕

EMSD文件寫，COPheating有3, COPCooling有2, 即係加埋COP有5

BEEO 2018 要求 heat pump min. COP Air to Water 大概3; Water to Water 大概4.5;

Air to Water 係Evaporator嗰loop用空氣嚟降低溫度，即係空氣入完Evaporator後，以更低溫度出返嚟，從而令Condenser嗰loop加熱；

由於要Loop幾轉嚟提高水溫，所以要個儲水箱，同埋留意溫度要去到60℃以避免退伍軍人症

有啲新型啲既Heat Pump係可做到即熱效果，因為用咗唔同Refrigerant

應用例子﹕

餐廳+廚房，一頭要冷氣一頭要暖氣

Heat Pump 同 Heat Recovery Chiller 分別見 https://elvissharing.blogspot.com/2020/04/ac-innovative-environmental-friendly.html

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For reference only, why Why COP can be greater than 1 and smaller than 1:

QH=QC+W 

According to the first law of thermodynamics, in a reversible system we can show that Qhot=Qcold+W and W=Qhot-Qcold where Qhot is the heat transferred
to the hot reservoir and Qcold is the heat collected from the cold heat reservoir.

COP=Qc/W , 係描述緊 Output/loss 既關係

(Source: EMSD)