ISO 14505-2-2006 PDF

Full title and description

Ergonomics of the thermal environment — Evaluation of thermal environments in vehicles — Part 2: Determination of equivalent temperature. This standard specifies methods for determining an equivalent temperature index that represents the combined thermal effect of air temperature, radiant temperature, air velocity and other local factors in vehicle compartments and similar confined spaces for ergonomics and HVAC assessment purposes.

Abstract

ISO 14505-2:2006 gives guidelines for the assessment of thermal conditions inside vehicle compartments and other confined spaces with non-uniform climates. It defines the concept of equivalent temperature (teq) and measurement approaches (physical manikins, segmented sensors and associated measurement modes) that can be used where deviations from thermal neutrality are relatively small; the methodology can be adopted in performance tests of vehicle HVAC systems.

General information

• Status: Published; edition confirmed as current following a five-year review (confirmed 2022).
• Publication date: 2006-12 (December 2006).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 13.180 (Ergonomics); 43.020 (Road vehicles in general).
• Edition / version: Edition 1 (2006).
• Number of pages: 25.

Note: a technical corrigendum (ISO 14505-2:2006/Cor 1:2007) was published to correct the original text.

Scope

Specifies procedures to determine the equivalent temperature for whole-body and segmental evaluations in vehicle cabins and similar enclosed spaces with asymmetric thermal conditions. Methods include use of ellipsoid sensors, multi-zone thermal manikins and prescribed measurement modes (constant surface temperature, constant heat flux, and a comfort-equation control mode) to derive an omni-directional equivalent temperature representative of human thermal response in non-uniform environments. The scope targets assessment and comparison of cabin thermal environments and can be referenced in HVAC performance testing standards.

Key topics and requirements

• Definition and calculation of equivalent temperature (teq) as an index combining convective, radiative and conductive influences on human heat exchange.
• Measurement techniques: ellipsoid sensors, segmented thermal manikins and rigs to simulate seated occupants; partitioning into zones to capture local variations.
• Recommended measurement modes: constant surface temperature, constant heat flux, and comfort-equation control — trade-offs between speed, stability and realism are described.
• Instrument performance and accuracy guidance (typical accuracy and repeatability targets, resolution and recovery time recommendations for manikins and sensors).
• Application guidance for integration of teq results into HVAC system evaluation and ergonomic assessments in vehicles.

Typical use and users

Used by automotive manufacturers, HVAC system designers, test laboratories, ergonomists, thermal comfort researchers and regulatory or standards bodies to assess cabin thermal performance, validate HVAC designs, compare heating/cooling strategies and support comfort-related claims. Test-house engineers and manikin manufacturers also use the standard when designing or specifying measurement rigs.

Related standards

ISO 14505-2 is part of the ISO 14505 series on evaluation of thermal environments in vehicles. Related parts include: Part 1 (principles and methods for assessment of thermal stress), Part 3 (evaluation of thermal comfort using human subjects) and Part 4 (determination of equivalent temperature by means of a numerical manikin). A corrigendum to Part 2 was issued in 2007.

Keywords

equivalent temperature; teq; thermal manikin; ellipsoid sensor; vehicle cabin; thermal comfort; HVAC testing; radiant temperature; convective heat; ergonomics; ISO 14505.

FAQ

Q: What is this standard?

A: ISO 14505-2:2006 is an international standard that defines the determination of equivalent temperature for the ergonomic evaluation of thermal environments inside vehicles and similar enclosed spaces.

Q: What does it cover?

A: It covers the concept of equivalent temperature (teq), measurement approaches (sensors, segmented and whole-body manikins, measurement modes), instrument specifications and recommended procedures to characterise non-uniform thermal environments in vehicle compartments for comfort and HVAC assessment.

Q: Who typically uses it?

A: Automotive OEMs, HVAC and climate-control engineers, independent test labs, ergonomists, researchers in thermal comfort and manikin/sensor manufacturers.

Q: Is it current or superseded?

A: The 2006 edition (with a 2007 corrigendum) was reviewed and confirmed in 2022 and remains the published edition; the ISO record indicates the part is subject to revision activity and replacement work items (e.g., ISO/FDIS 14505-2) have been initiated. Users should check the latest ISO catalogue or their national body for any formal replacement or amendment.

Q: Is it part of a series?

A: Yes — ISO 14505 is a multipart series addressing ergonomics of the thermal environment in vehicles (Parts 1 to 4 cover principles, equivalent temperature, human-subject comfort evaluation and numerical manikins respectively).

Q: What are the key keywords?

A: Equivalent temperature, thermal manikin, thermal comfort, vehicle cabin, HVAC testing, ellipsoid sensor, teq, ergonomics.