A partitioned model, based on theoretical and empirical relationships for convection, radiation, and evaporation, was developed to estimate the total heat lost to the atmosphere from warm water as it passes over a greenhouse roof surface. The model was verified with data collected on a model greenhouse roof section. Air temperature, wind speed, dew point temperature, solar radiation, and cloud cover were the measured meteorological variables used in the model. Regression and error analysis show that this partitioned model improved the heat loss predictions over a previous convective model in which the heat transfer coefficient was a function of wind velocity alone. The root-mean-square error and mean-absolute error of the partitioned model were about half that of the original convective model.
|Original language||English (US)|
|Number of pages||6|
|Journal||Transactions of the American Society of Agricultural Engineers|
|State||Published - Sep 1 1986|
All Science Journal Classification (ASJC) codes
- Agricultural and Biological Sciences (miscellaneous)