Performance test code for heat transfer element of air-cooled condenser in power plant
1 Scope
This standard specifies the basic requirements for the performance test for heat transfer element of air-cooled condenser in power plant, the sorting and calculation of test data, the preparation of test reports, etc.
This standard is applicable to the laboratory thermal performance test and resistance performance test for heat transfer element of air-cooled condenser in power plant.
2 Normative references
The following referenced documents are indispensable for the application of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 1236 Test methods of aerodynamic performance for fans
GB/T 2624 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full
DL/T 244 Performance test code on direct air-cooled system
DL/T 1290 Test method on vacuum tightness of direct air-cooled generating unit
3 Terms and definitions
3.1
air-cooled condenser
heat exchanger used in the direct air-cooled system, which uses air as the cooling medium to directly cool the exhaust steam of the steam turbine and condense into water
3.2
heat transfer element
basic element of the heat exchanger, which is composed of fins and heat exchange tubes
3.3
inlet air temperature
inlet air temperature of heat transfer element, that is, the air temperature before heat absorption
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3.4
outlet air temperature
outlet air temperature of the heat transfer element, that is, the air temperature after heat absorption in the heat transfer element
3.5
inlet steam pressure/temperature
inlet steam pressure/temperature of heat transfer element, that is, the steam pressure/temperature before heat release
3.6
condensate pressure/temperature
condensate pressure/temperature of steam after exothermic condensation in heat transfer element
3.7
resistance
pressure loss when air flows through heat transfer elements
4 General principles
4.1 The heat transfer element of air-cooled condenser of the direct air-cooled system in power plant should be tested for laboratory thermal and resistance performance to determine their technical indexes and performance.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 General principles
5 Preparation before test
6 Laboratory technical conditions
7 Test measurement parameters and methods
8 Test conditions and requirements
9 Sorting and calculation of test data
10 Requirements for test report content
