1 Scope
This part of GB/T 27698 specifies the test methods for heat exchange and fluid resistance performance under the test conditions of liquid-liquid without phase change, vapor-liquid condensation with phase change and vapor-liquid evaporation with phase change of tubular heat exchangers.
The test fluids applicable to this part are liquid-liquid and vapor-liquid.
This part only considers the heat conduction thermal resistance of heat exchange tube material, and does not consider the fouling thermal resistance inside and outside the heat exchange tube.
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 151 Tubular heat exchangers
GB/T 27698.1 Test method for the performance of heat exchangers and heat exchange element—Part 1: General requirements
3 Requirements
3.1 Design data and test parameters of the test prototype
a) Material of heat exchange tube;
b) Shell side structure and geometric dimensions;
c) Tube form and geometrical dimensions;
d) Tube arrangement;
e) Spacing between tubes;
f) Form and arrangement of the baffling elements;
g) Path;
h) Equivalent diameter;
i) Cross-sectional area of circulation;
j) Heat exchange area;
Foreword i
1 Scope
2 Normative references
3 Requirements
4 Processing of test data
5 Error
