PD CEN CLC TR 17603-31-08-2021 PDF

Full title and description

STB PD CEN/CLC/TR 17603-31-08:2021 — Space Engineering — Thermal design handbook — Part 8: Heat Pipes. This technical report provides consolidated design data, guidance and reference material for the use of heat pipes in spacecraft thermal control and thermal‑management designs.

Abstract

This Technical Report (TR) collects background material, empirical data, design guidance and recommended practices for heat‑pipe selection, sizing, integration and testing in space systems. It is an informative (non‑normative) handbook developed to support EN 16603 series requirements and originates from ECSS guidance (ECSS‑E‑HB‑31‑01 Part 8A). The document does not itself introduce mandatory requirements but provides the engineering information typically used during spacecraft thermal design.

General information

• Status: Current / Active technical report.
• Publication date: 1 September 2021 (2021-09-01).
• Publisher: CEN/CLC (prepared under CEN/CLC/JTC 5 “Space”; secretariat held by DIN). National adoptions include UNE/AENOR listings.
• ICS / categories: 49.140 — Space systems and operations.
• Edition / version: 2021 (first published edition as PD CEN/CLC/TR 17603‑31‑08:2021).
• Number of pages: 153 pages (vendor listings commonly show 153 pages).

Scope

Provides guidance and reference data for the thermal design, selection, integration and testing of heat pipes in spacecraft and space equipment. Topics include heat‑pipe types and architectures, thermal performance parameters (conductance, capillary limits, thermal resistance), evaporator and condenser design considerations, materials and compatibility for space environments, test methods and recommended design margins for microgravity/spaceflight applications. The TR is intended as an informative handbook to support the normative EN 16603 series.

Key topics and requirements

• Overview of heat‑pipe technologies and applicable configurations (axial, loop, variable conductance, etc.).
• Thermal conductance and sizing methods — empirical data and worked examples for steady‑state and transient loads.
• Evaporator/condenser design, wick types, working fluids and material compatibility for space environments.
• Performance limits (capillary limit, entrainment, sonic limit) and recommended safety margins for space use.
• Integration aspects: interfaces, mounting, thermal contacts, and heat‑pipe routing within spacecraft thermal control architectures.
• Recommended test methods, qualification approaches and vacuum/microgravity test considerations.
• Notes on intellectual property: the TR draws on industry practice and ECSS material; users are advised that some elements may be subject to patent rights.

Typical use and users

Primary users are spacecraft thermal engineers, systems engineers, payload designers, thermal‑control specialists, test engineers and contractors working on satellites, launch vehicles and space instrumentation. The TR is used as a reference handbook during conceptual design, detailed thermal sizing, trade studies and test planning. Engineering teams consult it for empirical data, worked examples and best‑practice guidance when applying heat pipes in space applications.

Related standards

Closely related documents include EN 16603 (space systems — specific parts), other parts of TR 17603 (the Thermal Design Handbook series, Parts 1–16), and ECSS‑E‑HB‑31‑01 guidance material (source heritage). Users should consult the EN/ECSS documents for normative requirements and this TR for informative design data.

Keywords

heat pipes; spacecraft thermal control; thermal design handbook; TR 17603; CEN/CLC; thermal conductance; evaporator; condenser; wick; microgravity testing.

FAQ

Q: What is this standard?

A: It is a CEN/CLC technical report (PD CEN/CLC/TR 17603‑31‑08:2021) — an informative handbook providing design data and guidance on heat pipes for space applications rather than a prescriptive, normative standard.

Q: What does it cover?

A: It covers heat‑pipe technologies, thermal performance parameters, sizing methods, materials and compatibility, integration and testing guidance specifically for spacecraft thermal control.

Q: Who typically uses it?

A: Spacecraft thermal and systems engineers, payload designers, test engineers, and contractors involved in satellite and space equipment design and qualification.

Q: Is it current or superseded?

A: As published it is current (published 1 September 2021) and is an informative TR supporting the EN/CLC suite; users should verify on their national standards body or CEN/CENELEC for any later revisions or supersessions.

Q: Is it part of a series?

A: Yes — it is one part of the TR 17603 Thermal Design Handbook series (multiple parts covering view factors, cavities, materials, insulations, radiators, phase‑change capacitors, fluid loops, cryogenic cooling, etc.).

Q: What are the key keywords?

A: Heat pipes; spacecraft thermal control; thermal design; TR 17603; EN 16603; ECSS heritage.