Heat produced by people

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Table showing the sensible heat produced by people according to the level of activity performed. Indications in kcal/h, W and BTU.

In thermal engineering and HVAC (Heating, Ventilation, and Air Conditioning), it is essential to understand and manage all heat sources present in an environment to ensure thermal comfort, energy efficiency and occupant safety . Among the various heat sources, the heat produced by people plays a significant role and deserves special consideration.

This paper was designed and created by Itieffe, to delve deeper into this specific heat source and to provide detailed information on how it influences the design and management of HVAC systems, whether for residential, commercial or industrial buildings. This topic is of fundamental importance since the heat generated by people is influenced by various factors, including physical activity, metabolism, clothing and the surrounding environment.

Effective management

Effectively managing the heat produced by people is essential for correctly sizing HVAC systems, controlling indoor temperature and humidity, and optimizing energy efficiency. Furthermore, in overcrowded situations or in environments where many people work or gather, the correct management of the heat produced by people can affect the quality of the indoor air and the overall well-being of the occupants.

We are certain that this paper will constitute an informative and practical resource for engineers, designers and professionals in the HVAC sector, helping to improve the understanding and management of this important variable in the field of air conditioning and environmental comfort.

Heat produced by people

Sensitive heat produced by people according to the level of activity carried out. Indications in kcal / h, W and BTU.

The human body continuously emits thermal energy corresponding on average in an hour, to that of a 100 Watt light bulb.

Normally an adult releases an average of 2.5 kW of energy throughout the day, an amount that could run a liquid crystal display television for 20 hours.

We all exchange the sensible and latent heat produced by our body with the environment around us.

The way we do it is closely linked to the type of activity that is carried out and to the thermohygrometric conditions of the air.

Light sedentary work involves less sensitive and latent heat exchange than heavy work will provide.

All other things being equal, the total heat emitted by a male subject is significantly greater than that emitted by a female subject: normally about 15% more.

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