On 07/25/12 08:20 PM, Nick Kemp wrote: > Room temperature change (delta T) will be the same in both cases. What I > think you are getting at is the temperature off the coil. Slow air will > be cooler but less is moved. Fast air will be warmer but more is moved. > > In a room, with a 12,000 BTU heat exchange via a heat pump, the > resulting room temp will be the same regardless of the airspeed over the > coil. The system removes 12,000 BTU. The room should be warmer. Even though the air may be getting colder, there is air less moving, thus decreasing the delta t between the evaporator and moving air. The net result will be less transfer of btu. > The question at hand is "what maximizes the cooling capacity of the heat > pump, fast air or slow air? > > > Fast air. In any heat exchanger, when you increase air flow and turbulence you increase its efficiency to exchange heat. You cannot increase its efficiency by slowing down air flow. [Non-text portions of this message have been removed] ------------------------------------ To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnewsYahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/dmcnews/join (Yahoo! ID required) <*> To change settings via email: dmcnews-digest@xxxxxxxxxxxxxxx dmcnews-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/