MODELING HEAT LOSS FROM SURFACE HEATED GREENHOUSE WATER.

Paul Heinz Heinemann, P. N. Walker

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

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 languageEnglish (US)
Pages (from-to)1379-1384
Number of pages6
JournalTransactions of the American Society of Agricultural Engineers
Volume29
Issue number5
StatePublished - Sep 1 1986

Fingerprint

Greenhouses
Heat losses
Hot Temperature
greenhouses
heat
Water
Radiation
modeling
Convection
Temperature
water
Atmosphere
Air
Regression Analysis
wind speed
Roofs
roof
dewpoint
wind velocity
dew point

All Science Journal Classification (ASJC) codes

  • Agricultural and Biological Sciences (miscellaneous)

Cite this

@article{953114017e6347a88a84f02e77c1ea5a,
title = "MODELING HEAT LOSS FROM SURFACE HEATED GREENHOUSE WATER.",
abstract = "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.",
author = "Heinemann, {Paul Heinz} and Walker, {P. N.}",
year = "1986",
month = "9",
day = "1",
language = "English (US)",
volume = "29",
pages = "1379--1384",
journal = "Transactions of the ASABE",
issn = "2151-0032",
publisher = "American Society of Agricultural and Biological Engineers",
number = "5",

}

MODELING HEAT LOSS FROM SURFACE HEATED GREENHOUSE WATER. / Heinemann, Paul Heinz; Walker, P. N.

In: Transactions of the American Society of Agricultural Engineers, Vol. 29, No. 5, 01.09.1986, p. 1379-1384.

Research output: Contribution to journalArticle

TY - JOUR

T1 - MODELING HEAT LOSS FROM SURFACE HEATED GREENHOUSE WATER.

AU - Heinemann, Paul Heinz

AU - Walker, P. N.

PY - 1986/9/1

Y1 - 1986/9/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0022781111&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0022781111&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0022781111

VL - 29

SP - 1379

EP - 1384

JO - Transactions of the ASABE

JF - Transactions of the ASABE

SN - 2151-0032

IS - 5

ER -