@misc{23286,
  author = {Iain S Walker and Max H Sherman},
  title = {Heat Recovery in Building Envelopes},
  abstract = {<p>Infiltration has traditionally been assumed to contribute to the energy load of a building by an amount equal  to the product of the infiltration flow rate and the enthalpy difference between inside and outside.  Some  studies have indicated that application of such a simple formula may produce an unreasonably high  contribution because of heat recovery within the building envelope.  The major objective of this study was  to provide an improved prediction of the energy load due to infiltration by introducing a correction factor  that multiplies the expression for the conventional load.  This paper discusses simplified analytical  modeling and CFD simulations that examine infiltration heat recovery (IHR) in an attempt to quantify the  magnitude of this effect for typical building envelopes.  For comparison, we will also briefly examine the  results of some full-scale field measurements IHR based on infiltration rates and energy use in real  buildings.  The results of this work showed that for houses with insulated walls the heat recovery is  negligible due to the small fraction of the envelope that participates in heat exchange with the infiltrating  air.  However; there is the potential for IHR to have a significant effect for higher participation dynamic  walls/ceilings or uninsulated walls.   This result implies that the existing methods for evaluating infiltration  related building loads provide adequate results for typical buildings.</p>},
  year = {2003},
  language = {eng},
}