BS ISO 19659-3:2022 - Page 2

Railway applications. Heating, ventilation and air conditioning systems for rolling stock. Energy efficiency | Status: Current

1 Scope This document is applicable to the calculation, measurement and/or verification of energy consumption of railway vehicle HVAC (heating, ventilation and air-conditioning) systems. The HVAC system energy consumption is simulated, calculated, measured and validated in accordance with the requirements of thermal comfort defined in ISO 19659‑2, considering the same category of passenger railway vehicles as detailed in ISO 19659‑2, Clause 4:

• — Category 1 (e.g. main line, intercity, long distance, high speed);
• — Category 2 (e.g. suburban, commuter, regional);
• — Category 3 (e.g. urban, LRV, tram, metro/subway).

This document only covers the passenger area HVAC systems. Driver’s cab HVAC systems are excluded but could be treated in a similar way.