Effects of stratification on the performance of liquid-based solar heating systems

W. F. Phillips, R. N. Dave

Research output: Contribution to journalArticlepeer-review

55 Scopus citations


A theoretical model is presented which predicts the effects of storage tank stratification on the instantaneous performance of a liquid-based solar heating system. The results are presented in terms of a stratification coefficient which is defined to be the ratio of the actual useful energy gain to the energy gain that would be achieved in a fully mixed tank. This stratification coefficient is shown to be a system constant which depends on only two dimensionless system parameters. The closed form model is compared with a detailed numerical simulation and also with experimental data taken with a solar water heater. Both the simulation data and the experimental data agree favorably with the theoretical model.

Original languageEnglish (US)
Pages (from-to)111-120
Number of pages10
JournalSolar Energy
Issue number2
StatePublished - 1982
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • General Materials Science


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