This standard specifies the calculation method of equipment thermal efficiency. This standard applies to thermal equipment that uses fuel and utilizes heat. GB/T 2588-2000 General rules for calculating equipment thermal efficiency GB/T2588-2000 standard download decompression password: www.bzxz.net

ICs 27.010
National Standard of the People's Republic of China
GB/T 2588—2000
The general principles for calculation ofthermal efficiency of equipment
The general principles for calculation ofthermal efficiency of equipment2000-03-16 Issued
Implemented on 2000-09-01Www.bzxZ.net
Issued by the State Administration of Quality and Technical Supervision
GH/T 25BB2000
Thermal efficiency of equipment is a comprehensive indicator used to measure the energy utilization technology and economic benefits of heat recovery equipment.
This standard is one of the first batch of national energy standards formulated by my country. The main differences between this revised version and CB/T2589-1981 are:
1) It is compiled in accordance with the requirements of GB/T1.1-10034 Guidelines for standardization work Unit 1: Part 1: Specification for production loss, and has established new contents and formats for the standard; 2) In the efficiency calculation formula, the unit of measurement 1 (joule) is adopted in my country, and the relationship between the two is emphasized to meet the requirements of the basic laws of thermal science;
3) The six common forms of loss are supplemented. This standard replaces GB/2588-2951 from the date of implementation. This standard is proposed by the National Energy Basic and Standardization Technical Committee. This standard is jointly approved by the National Energy Basic and Standardization Technical Committee Energy Management Sub-Technical Committee. This standard is jointly approved by China National Institute of Standardization and Technology, China Energy Research Institute, Tianjin Energy Testing Service Center and China Energy Engineering General Company. The main contributors of this standard are: Liu Aixian, Pang Dingguo, Zhang Guanjisheng, Huang Zhijie and Xia Lichang. This standard was first changed on July 1, 2011.
National Standard of the People's Republic of China
The general principles for culcufstion afthermal efficiency kclency af equipment
The technical standard specifies the calculation method of equipment efficiency. This standard is applicable to thermal equipment using fuel heat. 2 Referenced standards
GA/T 2588—2000
CB/T2589—1981
The texts of many standards are the texts of this standard. When this standard is available, the versions shown are effective. All standards will be revised. The parties using this standard should consider the possibility of using the latest version of the following standards. GB/T2597—1981 General rules for energy efficiency of thermal equipment 3 Definitions
In addition to the relevant technical evaluation in GB/2587, this standard also uses the following definitions. 3.1 Assume that the thermal efficiency of each thermal equipment is the effective utilization degree of the supplied energy to achieve the specified purpose, which is equal to the percentage of the effective energy in the total energy.
3.2 Supply energy supplyerergy
The energy of the vehicle system,
3.3 Effective energy fecliveemrgy
When the process number is reached: Theoretically, more energy must be consumed. 3.4 Reporting large energy losser.ergy
Although the supply energy is not fully consumed, the energy used is calculated by the thermal efficiency of the energy A
4.1 Let us calculate the equipment refining efficiency using the following formula: ×30
Where, Qc - equipment thermal efficiency, %
Qrx - effective energy, J:
Qss - loss energy, J.
Approved by the State Administration of Quality Supervision, Inspection and Quarantine on March 16, 2000, implemented on September 1, 2000
GB/T258B-2000
4.2 When calculating the thermal efficiency, the system and calculation basis of the equipment must be clearly defined: the establishment of the heat balance relationship must meet the requirements of the basic laws of thermodynamics
4.3 For equipment working continuously: the thermal efficiency of the equipment refers to the thermal efficiency under the thermal setting; for equipment working in intervals or for a period of time, the thermal efficiency of the equipment refers to the thermal efficiency of the normal working cycle. 4.4 The calculation of the thermal efficiency of special equipment or equipment under special conditions should be explained. 5 Supply energy
Supply energy generally refers to one or more of the following items. 5.1 Energy supplied by fuel.
5.1.1 Energy brought into the fuel, including the basic (lowest) calorific value of the fuel and the heat generated by the fuel from the base temperature to the system population. 5.1.2 Heat brought into the system by air, which is the sum of the heat at the inlet of the system and the water temperature at the reference temperature. The air content is assumed to be constant in the calculation. 5.1.3 Potential pressure of atomizing steam, which is the difference between the heat at the inlet of the system and the water temperature at the reference temperature. 5.2 External power supply to the system, station:
5.3 Heat transfer from the outside to the system:
5.4 Energy brought into the system by energy body
5.4.1 For the rotating body, the starting power supply is the sum of the heat at the inlet of the system and the water temperature at the reference temperature. 5.4.2 If the energy carrier is hot air, flue gas, or other hot fluid, the energy supplied is the difference between the energy carrier at the inlet of the system and the base temperature of the equipment:
5.5 Sensible heat brought into the system by the material:
5.6 When there is a chemical reaction, the heat of the exothermic reaction 5.7 Other energy requirements not included in the above items. 6 Effective energy
Effective energy usually includes the following items: 6.1 In the heating process, the heat absorbed by the system inlet state to the outlet state, 62 In the thermal process where the temperature is higher than the inlet temperature of the process, the heat required to heat from the internal system inlet temperature to the required temperature of the process.
6.3 When there is a chemical reaction, the heat of the endothermic reaction. 6.4 In the process of removing moisture and the heat absorbed by the new material in the coal, etc. 6.5 The product itself contains or is certified to produce combustibles: some of the combustibles will be used as the base (the location of the product,
6.6 The system outputs electricity to the outside.
6.7 The above items do not include some of the batteries. The most incapable type
The temperature incapable ratio usually has one or more of the following terms: 7.1 The arrangement of the equipment for gas distribution.
7.2 The fuel is completely burned when it is fully cooked, 1.2.1 The gas is completely burned when it is fully cooked. 7.2 The heat loss of the combustible gas in the combustion products (the lower part) 7.3 The heat loss of the equipment (the heat loss of the incomplete combustion of the combustible gas) 7.4 The heat loss of the equipment cover, door and other equipment during the shortening of the operation 7.5 The sensible heat loss of the equipment, such as length, K, or meters: 2 7.6 The heat loss of the equipment. 7.7 The heat loss of the coolant in the cooling device 7.8 The heat loss of the exhaust belt by the exhaust mechanism, GB/T 2588-2000. 9 Other energy barriers not included in the above. 8 The specific calculation of thermal efficiency can be supplemented in the industry standard according to the different requirements of the equipment.
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