This case study is the result of a partnership between New Zealandâs Energy Efficiency and Conservation Authority (EECA), the countryâs dairy farmers and technical experts,Â showing the benefits of solar water heating and waste heat recovery systems used to reduce energy costs.
The study presents the results obtained from four farms where these technologies had been applied. Research had shown that given the high solar radiation levels in the country, the average solar energy falling on a typical dairy shed can cover most of the water heating needs. Another free energy source taken into consideration is the heat present in the milk, in such cases a heat recovery system being employed to transfer this energy into stored hot water. Highly insulated storage tanks emerged as the best storage alternative due to their high superior level of energy saving.
Last but not least, this case study emphasizes the economic benefits raped from the use of these technologies, as well as the positive environmental impact.
Author: The Energy Efficiency and Conservation Authority (EECA)
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