This is presented in Fig. 8. The case which is presented in Fig. 8 is the same as the case of Table 2. Dh / DP Represents. The ratio of increased enthalpy to the increase of pressure according to the expansion valve opening change ((H _ (I 1) - h_i). (P _ (I 1) - P_i) and it can be regarded as a corresponding term of ∂ H / ∂ P In, ideal cases.The COP should be maximized at the point where the ratio of ∆ H / ∆ P to ∆ (w /) ̇ ∆ P is the same with present COP and below this. Expansion valve opening additional work, is much greater than the cooling capacity increase resulting in, lowering the COP.? However with some, reasons including, the above the figure shows that the maximum COP locates some biased, Nevertheless point.In the larger open region than 11.5%, of opening it obviously shows that COP is elevated with respect to close of expansion. Valve and Dh / DP is much larger than ∆ w ̇ / ∆ P. In, this aspect it can be told that this real time control method helps a. CO2 refrigeration system to avoid being operated with inadequately large expansion opening
This is presented in the form 8.The case is presented in the form 8 is the same as the case of Table 2 Dh / DP mean ratio of quantity of heat rising from the increase of pressure in the expansion of the valve opening change. ((H _ (I 1) - h_i) / (P _ (I 1) - P_i)).In case / ∂ P suitable for COP should expand its spot in the ratio of Δ H / Δ P to Δ (w /) ̇ Δ P is the same with the COP present and below the open expansion valve works more than.COP but, for some reason, as well as the top figures show that the maximum COP located some points on tilt. However, in the region to open larger than 11.5% of open, it obviously shows that the police are elevated with respect to the closing of the valve, the expansion and Dh / DP is larger than Δ. W ̇ / Δ P in this way, it can be said that the way of real time control. This will help the cooling system CO2.
การแปล กรุณารอสักครู่..