Principle
A common utilization of this principle is in systems which have an exhaust stream or waste stream which is transferred from the system to its surroundings. Some of the energy in that flow of material (often gaseous or liquid) may be transferred to the make-up or input material flow. This input mass flow often comes from the system's surroundings, which, being at ambient conditions, are at a lower temperature than the waste stream. This temperature differential allows heat transfer and thus energy transfer, or in this case, recovery. Thermal energy is often recovered from liquid or gaseous waste streams to fresh make-up air and water intakes in buildings, such as for the HVAC systems, or process systems.
Read more about this topic: Energy Recovery
Famous quotes containing the word principle:
“We seem to be pariahs alike in the visible and the invisible world, with no foothold anywhere, though by every principle of government and religion we should have an equal place on this planet.”
—Elizabeth Cady Stanton (1815–1902)
“Help thyself: then everyone will help thee too. Principle of Christian charity.”
—Friedrich Nietzsche (1844–1900)
“Well, you Yankees and your holy principle about savin’ the Union. You’re plunderin’ pirates that’s what. Well, you think there’s no Confederate army where you’re goin’. You think our boys are asleep down here. Well, they’ll catch up to you and they’ll cut you to pieces you, you nameless, fatherless scum. I wish I could be there to see it.”
—John Lee Mahin (1902–1984)