[Aerosol concentration and heat transfer by radiation (author's transl)]

Aerosols are able to influence the heat delivery of the human body. The influence of aerosols of various concentrations on the infrared radiation exchange of a solid with its environment is theoretically and experimentally investigated at a room climatic model. The heat delivery by infrared radiation of the solid is impaired for about 6% only by the saturated water vapour independent from the aerosol concentration. The influence of the particles on the radiation exchange is a function of the aerosol concentration and leads to a hindering of the heat delivery too. At a concentration of N approximately equal to 10(12) m--3 the heat delivery by radiation is diminished altogether for about 12%.