Once in a while a question comes up that I can’t think my way through. Here is one. Within an insulated system there is air passing over a heat source that constantly produces a certain number of BTU’s per hour. In the process, the air is heated from the inlet temperature to an elevated temperature at the outlet. If the air flow is increased, the outlet temperature will decrease – agreed? Does it necessarily follow that the surface temperature of the heat source is reduced as well? Is cooling improved (lower source temperature) or are the BTU’s removed just distributed over a larger amount of air thereby producing a lower temperature at the outlet?
I really don’t know the answer on this one and hope someone can help me. I’ll let you know how things come out.