The first conclusion from this graph is that the overall comfort is very closely linked to the air speed, with higher speeds giving higher comfort levels. The first three conditions (20°C) covered a wider range than the second three conditions, with the maximum being higher and the minimum being lower than the corresponding points for the second three conditions. In addition, the participants rated every condition as being more comfortable than 'neutral'. As was shown by the air speed results, the individual factors are intertwined and so it would not be safe to assume that the temperature is playing no role - in reality it is probably due to combination of effects.

 

Overall, this is a useful result for the system. We have shown that the majority of people find the system to be acceptable in most of the operating conditions, identified a link between the perceived temperature of the participant and the air speed of the flow, and shown that in general high air speeds and cooler temperatures are preferred. These results will be useful when considering the actual usage of the PV system or in proposing modifications for a future design.