The most likely cause of such low pressure in the highpressureside of the system would be insufficient refrigerant.
系统高压侧产生如此低压强的最可能原因是制冷剂不足。
2
Note: the reason why a flow arrow was not used was for applications such as pump isolation whereas preferred sealing direction and the highpressureside are not necessarily the same.
注意：不采用流向箭头的原因是，在某些应用场合，如泵隔离，其优先密封方向和高压面并一定相同。
3
Reducing the inlet temperature of cooling water and increasing its mass flow are favorable to increase refrigerant performance coefficient, and can decrease optimal pressure at highpressureside.