Shijiazhuang Zhongzheng Technology Co., Ltd.
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| High Light | Shell-and-Tube heat exchanger design guide ，Heat exchanger engineering principles ，2026 heat exchanger design manual | ||
Shell-and-tube heat exchanger design is an exercise in balancing thermal performance against pressure drop and mechanical integrity. The process integrates thermal analysis, hydraulic balancing (pressure drop constraints), and mechanical compliance (ASME Section VIII, TEMA, API 660). A successful design optimizes the convective film coefficients while ensuring the bundle geometry prevents fouling and manages thermal expansion.
Designing a shell-and-tube unit requires defining the geometric and operational variables that drive thermodynamic efficiency.
Engineers use the following core relationship to size the heat transfer area (A):
Where:
Q: Heat duty (W)
U: Overall heat transfer coefficient (W/m2 . K)
A: Effective heat transfer surface area (m2)
F: LMTD correction factor (typically kept > 0.75 to avoid temperature crossover)
ATim: Log Mean Temperature Difference (K)
Adherence to standardized codes is non-negotiable for industrial reliability and safety.
| Standard | Scope | Key Focus |
|---|---|---|
| ASME Section VIII | Pressure Vessel Code | Structural integrity, wall thickness, nozzle design. |
| TEMA | Tubular Exchanger Mfrs. Assoc. | Mechanical tolerances, baffle spacing, pass arrangements. |
| API 660 | Petroleum/Chemical Industry | Enhanced design for severe/high-pressure services. |
| PED (EU) | Pressure Equipment Directive | Safety compliance for European pressure systems. |
Q: Why use a U-tube configuration over a fixed tubesheet?
A: A U-tube design allows the bundle to expand independently of the shell, effectively mitigating thermal stresses. It is the preferred choice for large temperature differences between the shell and tube fluids.
Q: How do I manage fouling during the design phase?
A: Incorporate "fouling factors" into your calculation of U. Additionally, select a square tube layout if mechanical cleaning is anticipated, and ensure velocities are kept high enough (where possible) to provide a self-cleaning scouring effect.
Q: What is the optimal number of tube passes?
A: Higher passes increase velocity and heat transfer coefficients, but they also significantly increase pressure drop. The design goal is to maximize velocity within the allowable pressure drop budget defined by your piping system.
Are you evaluating a specific heat transfer application, such as a high-fouling chemical process or a high-pressure utility heater?
Company Details
Business Type:
Manufacturer
Year Established:
2008
Total Annual:
100,000,000-200,000,000
Employee Number:
400~500
Ecer Certification：
Verified Supplier
Shijiazhuang Zhengzhong Technology Co., Ltd (Center Enamel) is a leading high-tech enterprise specializing in the research, development, manufacturing, and sales of a diverse range of equipment. Our core business revolves around providing top-tier solutions, including Glass-Fused-to-Steel (GFS) tank... Shijiazhuang Zhengzhong Technology Co., Ltd (Center Enamel) is a leading high-tech enterprise specializing in the research, development, manufacturing, and sales of a diverse range of equipment. Our core business revolves around providing top-tier solutions, including Glass-Fused-to-Steel (GFS) tank...
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