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- W2056578663 abstract "The threat of frost during spring time (after ‘bud burst’) is an ever present danger to the vineyard owner. To minimise the risk, in addition to good site selection and vineyard management, a number of active frost protection systems are available. Most active methods of frost protection are costly in monetary terms and can also have a detrimental effect on the environment. This work presents the design and performance of a passive solar water heating quilt system under real vineyard operating conditions. Two vineyard sites were selected, and the solar water heating quilt design was evaluated over a three-month period. Detailed measurements of the temperature below and above the soil surface, levels of incident solar radiation and the wind direction and speed were recorded. Field study results indicate that the quilts can improve the solar collection and heat retention of the soil, resulting in increased temperatures during frost events of up to 1 °C in air space immediately adjacent to the solar quilts when compared to conditions off the protected area. In addition, the time period during which the frost remains a danger to the vine is also reduced. When heat collection, storage and extraction rates are investigated, simplified calculations indicate that the solar quilt can improve collection by 38.5% over bare soil, resulting in the release of 32% more heat. Extrapolated to vineyard coverage, this could result in an extra 3500 MJ of heat per hectare per (typical frost event condition) day." @default.
- W2056578663 created "2016-06-24" @default.
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- W2056578663 date "2009-03-01" @default.
- W2056578663 modified "2023-10-09" @default.
- W2056578663 title "A passive solar water heating system for vineyard frost protection" @default.
- W2056578663 cites W2042709107 @default.
- W2056578663 doi "https://doi.org/10.1016/j.solener.2008.08.014" @default.
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