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- W2765227580 abstract "This paper updates the ongoing research, by simulation and experimentation for a sustainable low-energy method to heat or cool and ventilate affordable housing. Renewable sources are used to heat or cool water which is circulated to low temperature (22-25°C) radiators (LTRs) on inside faces to make houses as thermally comfortable as caves. In cool (15°C annual average temperature) Melbourne, Australia, water from 100m-deep VGHEs has been measured at 22-24°C. Using the 25-30°C increase in ground temperature per kilometre depth given by the International Panel on Climate Change, the depth should be about 200m. Most of the inhabited places have annual average temperature of more than 0°C, and the estimated depth would be less than 1 kilometre. Literature review is included in the introduction and discussion. Method for heating (experimental house/s in Melbourne, Australia) is grouped with simulated results and experimental findings. Next subsection presents experiments in hot tropical Kuching, Malaysia and simulated results. The heat extracted from VGHE in winter is sustainable because in summer, solar-heated water is used for replenishment. In summer and tropical climates, the fan, which can create a cooling sensation of up to 4°C can enable 30.5°C indoors comfortable. Low power is required to circulate water and operate fans and can come from photovoltaics on the roof, enabling off-grid or zero-energy houses. Plans for May-August 2018 experiments include the use of a 300W photovoltaic thermal (PV/T) i.e., outdoor air will be drawn through the gap between the metallic roof and insulated ceiling, to be preheated ventilation air in winter. In Kuching, Malaysia, the water is cooled by radiation to the night sky to 25°C. The cooling coil of a PV or PV/T powered chiller is proposed to make the water colder. Hotter days would likely have more solar radiation to generate more power for the photovoltaic to make the coil colder. The ground source heat pump is not used, thus the VGHE-LTR could be comparable in cost to conventional e.g., horizontal GHE with heat pumps and high temperature (about 50°C) radiators. LTRs could be integrated into the inside metal that clads structural insulated panels and housing would be affordably constructed. Funding is sought for an experimental house in cool/cold climates with LTRs heated by a 23°-bottom temperature VGHE." @default.
- W2765227580 created "2017-11-10" @default.
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- W2765227580 date "2017-01-01" @default.
- W2765227580 modified "2023-09-26" @default.
- W2765227580 title "Sustainable Heating or Cooling and Ventilation of Affordable Zero-energy Housing" @default.
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- W2765227580 doi "https://doi.org/10.1016/j.proeng.2017.10.383" @default.
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