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Ozren Ocic Oil Refineries in the 21st CenturyOil phần 8

Nó có thể được nhìn thấy rằng sự khác biệt xuất hiện trong trường hợp này nhỏ hơn so với những người xuất hiện trong ví dụ trước của việc xác định số lượng tương đương căn cứ tính toán khác nhau (mật độ, nhiệt giá trị và số lượng của sản phẩm). | 4.7 Instruments for Determining Energy and Processing Efficiency of Gas Concentration Unit 97 SAME PRODUCTS Graphic 21 Cost prices of semi-products on gas concentration unit per products in US t Graphic 22 Cost prices of semi-products on gas concentration unit per calculating bases in US t density is 0.508 g cm3 butane whose density is 0.583 g cm3 iso-butane whose density is 0.564 g cm3 propane-butane mixture whose density is 0.551 g cm3 and stabilized gasoline whose density is 0.650 g cm3 on determining the equivalent numbers in the case of using the same calculating base for determining the equivalent numbers density method are shown in Tab. 48. It can be seen that the differences appearing in this case are smaller than those appearing in the previous example of determining the equivalent numbers by different calculating bases density thermal value and quantity of products . 98 4 Instruments for Determining Energy and Processing Efficiency of an Oil Refinery Tab. 48 Cost prices of semi-products on gas concentration unit in US t per reference products Item Semi-products Reference products no. Propane Butane Iso-butane Propane-butane mixture Stabilized gasoline 1 2 3 4 5 4 5 1 Propane 223.68 223.47 222.90 223.59 223.10 2 Butane 194.60 194.32 194.79 194.87 195.22 3 Iso-butane 201.31 200.15 200.81 201.03 200.45 4 Propane-butane mixture 205.78 204.04 204.83 205.13 207.42 5 Stabilized gasoline 174.47 174.89 174.70 174.36 174.30 Graphic 23 Cost prices of semi-products on gas concentration unit per different reference products in US t Graphic 24 Cost prices of semi-products on gas concentration unit per same reference products in US t 4.8 Instruments for Determining Energy and Processing Efficiency of Jet-fuel Hydrodesulfurization Unit 99 The results obtained by using the different reference derivatives but the same calculating base i.e. density method are shown in Tab. 48 and Graphics 23 and 24. The cost prices of semi-products generated on the gas concentration unit .