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According to the requirements of Notice on printing and distributing the development and revision plan on engineering construction standards and codes in 2014 (JIANBIAO [2013] No. 169) issued by the Ministry of Housing and Urban-Rural Development of the People's Republic of China, the drafting group has formulated this standard through extensive investigation and study, careful drawing of experience from practices, and on the basis of widely soliciting for opinions.
This standard consists of 5 clauses, covering the main technical contents as general provisions, terms, basic requirements, calculation of energy consumption and calculation of unit factor energy consumption of refinery.
The main technical contents revised in this standard are as follows:
——the specified equivalent coefficients of primary energy consumption of electricity, water and cooling capacity are modified;
——the specified equivalent coefficient of primary energy consumption of hydrogen purchased by oil refinery is added;
——the calculation method for unit factor energy consumption of refinery is added;
——the calculation method for energy consumption of hydrogen production device in oil refinery and the requirement that the purchased hydrogen is included in energy consumption of refinery are added.
The Ministry of Housing and Urban-Rural Development of the People's Republic of China is in charge of the administration of this standard, and SINOPEC LUOYANG ENGINEERING CO., LTD. is responsible for the explanation of specific technical contents. In case of any comment or suggestion in the process of implementing this standard, please send it to SINOPEC LUOYANG ENGINEERING CO., LTD. (address: No. 27, Zhongzhou West Road, Luoyang, Henan; 471003).
Standard for calculation of energy consumption in petrochemical engineering design
1 General provisions
1.0.1 This standard is formulated with a view to unifying the calculation method for energy consumption in petrochemical engineering design (hereinafter referred to as energy consumption).
1.0.2 This standard is applicable to the calculation of design energy consumption and practical energy consumption at the moment of putting the project into production and acceptance for constructed and renovated engineering of the whole plants, devices and utility systems of oil refinery, chemical plant, chemical fertilizer plant and chemical fiber plant using petroleum, both natural gas and petroleum, or natural gas as the main raw material.
1.0.3 The calculation of energy consumption in petrochemical engineering design shall not only comply with this standard, but also comply with those specified in the current relevant national standards.
2 Terms
2.0.1 energy transfer medium
consumed working substances that are not used as raw materials, nor enter into products in the process of production, and need to directly consume energy in production or preparation
2.0.2 equivalent coefficient of primary energy consumption
value obtained by converting unit quantity of primary energy and the primary energy consumed by producing unit quantity of electricity, hydrogen and energy transfer medium into standard fuel
2.0.3 specified equivalent coefficient of primary energy consumption
equivalent coefficient of primary energy consumption determined by analyzing the average energy consumption level of petrochemical industry
2.0.4 estimated equivalent coefficient of primary energy consumption
estimated equivalent coefficient of primary energy consumption calculated according to design conditions
2.0.5 actual equivalent coefficient of primary energy consumption
estimated equivalent coefficient of primary energy consumption calculated according to the actual production of the enterprise
2.0.6 energy consumption
sum of various fuels, electricity, hydrogen and energy transfer medium consumed by the energy-consuming system in the process of production, which is converted into the amount of primary energy (standard fuel) by the specified calculation method and in the specified unit
2.0.7 unit energy consumption
energy consumed by the energy-consuming system to process unit quantity of raw material or produce unit quantity of product
2.0.8 design energy consumption
energy consumption calculated according to the design consumption of fuel, electricity, hydrogen and energy transfer medium
2.0.9 practical energy consumption
energy consumption calculated according to the practical consumption of fuel, electricity, hydrogen and energy transfer medium
2.0.10 standard energy consumption
average advanced unit energy consumption of similar process unit (or system unit or whole plant) in the same period
2.0.11 standard energy consumption ratio
ratio of standard energy consumption of process unit (or system unit) to standard energy consumption of reference device
2.0.12 energy consumption factor
value obtained by converting the raw material (or product) amount of process unit (or system unit) to the raw material (product) amount of reference device according to standard energy consumption ratio
2.0.13 energy consumption factor of refinery
product of the sum of energy consumption factors of refinery process units and system units and the correction coefficient of ambient temperature
2.0.14 unit energy consumption of refinery
unit energy consumption of oil refinery calculated based on the processing amount of crude oil (raw material)
2.0.15 unit factor energy consumption of refinery
ratio of unit energy consumption of refinery to energy consumption factor of refinery
3 Basic requirements
3.0.1 The energy consumption shall be calculated according to the primary energy consumption, and the unit of energy consumption should be kilogram (kg) standard oil or ton (t) standard oil, and the low calorific value of 1kg standard oil is 41.868MJ.
3.0.2 The raw materials of oil refinery, chemical plant and chemical fiber plant (device) shall not be included in the energy consumption, and the raw material of chemical fertilizer plant (device) shall be included in the energy consumption.
3.0.3 Energy consumption should be calculated on the basis of unit raw material or unit product, or on the basis of unit time.
3.0.4 The design energy consumption shall be calculated according to the design conditions, and the consumption under the working conditions such as start-up, shutdown, accident, fire fighting and temporary purging shall not be included in the energy consumption. Intermittent consumption or output during normal production shall be converted into average before being included in the energy consumption.
3.0.5 The wastewater produced in the normal production process of the device shall be included in the energy consumption of device.
3.0.6 In calculating the energy consumption of the whole plant, the estimated equivalent coefficient of primary energy consumption or actual equivalent coefficient of primary energy consumption should be adopted, or the specified equivalent coefficient of primary energy consumption may also be adopted. Specified equivalent coefficient of primary energy consumption shall be adopted for the calculation of energy consumption of device.
3.0.7 Practical energy consumption should be adopted for assessing the design energy consumption.
3.0.8 The specified equivalent coefficient of primary energy consumption of fuel, electricity, pure hydrogen and energy transfer medium shall be selected according to Table 3.0.8. The energy consumption of heat exchanged between energy-consuming systems shall be calculated according to the requirements of 4.2.3.
Table 3.0.8 Specified equivalent coefficient of primary energy consumption of fuel, electricity, pure hydrogen and energy transfer medium
S.N. Category Unit Equivalent coefficient of primary energy consumption (kg standard oil) Remarks
1 Electricity kWh 0.22 —
2 Standard oil? t 1,000
3 Standard coal t 700
4 Gasoline t 1,030 —
5 Kerosene t 1,030
6 Diesel t 1,020
7 Catalytic burning t 950
8 Industrial coke t 800
9 Methanol t 470
10 Pure hydrogen? t 3,000 Applicable to calculation of energy consumption of chemical fertilizer plants
11 Pure hydrogen? t 1,100 Applicable to calculation of energy consumption of oil refinery
12 Steam at 10.0MPa level t 92 7.0MPa≤P?
13 Steam at 5.0MPa level t 90 4.5MPa≤P?<7.0MPa
14 Steam at 3.5MPa level t 88 3.0MPa≤P?<4.5MPa
15 Steam at 2.5MPa level t 85 2.0MPa≤P?<3.0MPa
16 Steam at 1.5MPa level t 80 1.2MPa≤P?<2.0MPa
17 Steam at 1.0MPa level t 76 0.8MPa≤P?<1.2MPa
18 Steam at 0.7MPa level t 72 0.6MPa≤P?<0.8MPa
19 Steam at 0.3MPa level t 66 0.3MPa≤P?<0.6MPa
20 Steam <0.3MPa level t 55 —
21 Cooling capacity at 7℃~12℃ MJ 0.010 Sensible heat cooling capacity
22 Cooling capacity at 5℃ MJ 0.014 Phase change cooling capacity
23 Cooling capacity at 0℃ MJ 0.015
24 Cooling capacity at -5℃ MJ 0.016
25 Cooling capacity at -10℃ MJ 0.018
26 Cooling capacity at -15℃ MJ 0.020
27 Cooling capacity at -20℃ MJ 0.024
28 Cooling capacity at -25℃ MJ 0.029
29 Cooling capacity at -30℃ MJ 0.036 Phase change cooling capacity
30 Cooling capacity at -35℃ MJ 0.041
31 Cooling capacity at -40℃ MJ 0.046
32 Cooling capacity at -45℃ MJ 0.052
33 Cooling capacity at -50℃ MJ 0.060
34 Fresh water t 0.15 —
35 Circulating water t 0.06
36 Softened water t 0.20
37 Demineralized water t 1.0
38 104℃ deaerated water t 6.5
39 Condensed water of condenser t 1.0
40 120℃ condensed water requiring oil and iron removal t 5.5
41 120℃ condensed water that can be directly reused t 6.0
42 Wastewater? t 1.1
43 Cleaned compressed air m3? 0.038
44 Non-cleaned compressed air m3? 0.028
45 Oxygen m3? 0.15
46 Nitrogen m3? 0.15
47 Carbon dioxide (gas) m3? 0.15
Notes: ? The fuel shall be converted into standard oil according to its low calorific value;
? The volume fraction is not less than 99.9%, and the hydrogen with other purities is converted according to its mass fraction;
? The steam pressure refers to gauge pressure;
? The wastewater, as energy transfer medium, may be discharged in the production process only after it is treated as qualified through energy consumption;
? Volume at 0℃ and 0.101325MPa. The gas measurement unit (m3) mentioned in this standard is the volume in this state.
3.0.9 The equivalent coefficient of primary energy consumption of gas fuel may be calculated according to the gas composition and the low calorific value.
4 Calculation of energy consumption
4.1 Calculation equation
4.1.1 The energy consumption of energy-consuming systems shall be calculated using the following equation:
E=∑(GiCi)+∑Qj (4.1.1)
Where,
E——the energy consumption of energy-consuming system, with positive value indicating energy consumption and negative value indicating energy output;
Gi——the consumption of fuel, electricity, hydrogen and energy transfer medium, which is positive in case of consumption and negative in case of output;
Ci——the equivalent coefficient of primary energy consumption of fuel, electricity, hydrogen and energy transfer medium;
Qj——the standard energy converted by heat exchanged between the energy-consuming system and the outside, which is positive in case of input and negative in case of output.
4.1.2 The unit energy consumption shall be calculated using the following equation:
e=E/G (4.1.2)
Where,
e——the unit energy consumption, kg/t;
E——the energy consumption of energy-consuming system, kg/h;
G——the amount of raw material or product of energy-consuming system, t/h.
4.2 Calculation requirements
4.2.1 The energy consumption calculation of each energy-consuming system may be summarized according to Table 4.2.1.
Table 4.2.1 Summary of energy consumption calculation (sample table)
Name of device (or unit/whole plant): Nominal design scale: Mt/a Amount of raw material (product): t/h
S.N. Item Consumption Equivalent coefficient of primary energy consumption Design energy consumption
kg/h Unit energy consumption
kg/t Remarks
Unit Amount Unit Amount
1 Electricity kW kg/kWh
2 Fuel
Fuel oil r/h kg/t
Fuel gas t/h kg/t
Coal t/h kg/t
Catalytic burning t/h kg/t
Industrial coke t/h kg/t
3 Hydrogen?
Chemical fertilizer hydrogen t/h kg/t
Ethylene hydrogen t/h kg/t
Hydrogen production by coal t/h kg/t
4 Steam
10.0MPa t/h kg/t
3.5MPa t/h kg/t
1.0MPa t/h kg/t
0.3MPa t/h kg/t
<0.3MPa t/h kg/t
5 Cooling capacity
7℃~12℃ MJ/h kg/MJ
-15℃ MJ/h kg/MJ
-30℃ MJ/h kg/MJ
-50℃ MJ/h kg/MJ
6 Water
Fresh water t/h kg/t
Circulating water t/h kg/t
Softened water t/h kg/t
Demineralized water t/h kg/t
Deaerated water t/h kg/t
Condensed water of condenser t/h kg/t
Condensed water of heating equipment t/h kg/t
Wastewater t/h kg/t
7 Heat capacity
Hot feed/discharge MJ/h kg/MJ
Heat input/output MJ/h kg/MJ
8 Gas
Cleaned compressed air m3/h kg/m3
Non-cleaned compressed air m3/h kg/m3
Oxygen m3/h kg/m3
Nitrogen m3/h kg/m3
Carbon dioxide (gas) m3/h kg/m3
9 In total
Note: ? This item is included in the calculation of energy consumption of the whole oil refinery or chemical fertilizer plant, but not in the calculation of energy consumption of refining process units.
4.2.2 The fuels consumed by energy-consuming systems with raw materials not included in energy consumption shall include externally supplied and self-produced fuels, while the fuels consumed by energy-consuming systems with raw materials included in energy consumption shall not be included in self-produced fuels.
4.2.3 The standard energy of heat exchanged between the energy-consuming system and the outside shall be calculated according to the following requirements:
1 Hot feed and hot discharge of oil products: when the temperature of heat of hot feed or hot discharge is equal to or greater than 120℃, the standard energy is calculated for heat higher than 120℃ according to the ratio of 1:1, calculated for heat between the specified temperature of oil products and 120℃ by halving, and not calculated for heat below the specified temperature of oil products. Specified temperature of oil products: 60℃ for gasoline, 70℃ for diesel oil, 80℃ for wax oil and 120℃ for residual oil.
2 Heat exchange: as for the heat input or output through heat exchange between energy-consuming systems, the standard energy is calculated according to the ratio of 1:1 for heat above 120℃, calculated by halving for the heat between 60℃ and 120℃, and not calculated for heat below 60℃.
4.2.4 The seasonal heat input or output for heating and refrigeration shall be converted into annual average and included in energy consumption.
4.2.5 The calculation of power loss of power transmission and transformation system shall be carried out according to the current professional standard SH/T 3116 Calculation method for electricity load design in petroleum refineries.
Foreword ii
1 General provisions
2 Terms
3 Basic requirements
4 Calculation of energy consumption
4.1 Calculation equation
4.2 Calculation requirements
5 Calculation of unit factor energy consumption of refinery
5.1 Calculation equation
5.2 Calculation requirements
Explanation of wording in this standard
List of quoted standards
