### Abstract

This paper develops a stochastic procedure for generating synthetic sets of hourly solar irradiation values, suitable for use in solar simulation design work. The daily atmospheric transmittance K_{t} for the day in question is broken down into hourly irradiation events by a stochastic disaggregation procedure. The necessary disaggregation models were constructed using the quasi-universal hourly atmospheric transmittance k_{t}, instead of the irradiation itself, as the random variable. Analyses of meteorological records revealed that both the marginal probability and stochastic features of sets of hourly events k_{t} within an individual day can be closely predicted using the K_{t} for the day. Results indicated that the parameters defining the disaggregation procedure were independent of geographical location. The values of k_{t} are found to be closely modeled by a Beta distribution, and a mean correlation coefficient between successive hourly values of k_{t} was found to be 0.54±0.14. An algorithm is described from which unlimited hourly solar irradiation data may, therefore, be generated using only the 12 monthly means of daily events, K_{t}.

Original language | English (US) |
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Pages (from-to) | 333-341 |

Number of pages | 9 |

Journal | Solar Energy |

Volume | 44 |

Issue number | 6 |

DOIs | |

State | Published - 1990 |

### ASJC Scopus subject areas

- Renewable Energy, Sustainability and the Environment
- Materials Science(all)

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## Cite this

*Solar Energy*,

*44*(6), 333-341. https://doi.org/10.1016/0038-092X(90)90137-2