TS EN 305

TS EN 305 is the standard for defining heat exchanger performance and for the general test procedures used to establish that performance. Because heat transfer in these devices depends on the interaction between hot and cold fluids across a separating surface, the standard provides a common technical language for describing performance, organizing test results, and comparing exchanger behaviour in a consistent way.

Performance definitions and calculation basis

The standard specifies general terms and calculations used in determining heat exchanger performance, together with the related theory. In practical engineering terms, this supports a consistent interpretation of heat duty, temperature difference, flow conditions, and performance indicators across different exchanger designs. It gives users a shared framework for discussing how well a heat exchanger transfers heat under defined operating conditions.

Why the general test procedure matters

Rather than focusing on one specific construction, the document addresses the general test procedure for all heat exchangers. This is important because shell-and-tube, plate, finned, and other exchanger types may differ in geometry and operating details, yet their performance still needs to be assessed on a comparable basis. The standard therefore supports a common approach to evaluation while leaving the design-specific arrangement to the particular exchanger under test.

• Defines general terms used to describe heat exchanger performance.
• Covers the calculations used in performance determination and the related theory.
• Includes a general test procedure applicable to all heat exchangers.
• Applies to heat exchangers classified according to heat transfer arrangement.