Abstract
Abstract The study presented in this paper is a continued research of preceding tests of small-scale passive solar wall module to explore 1) the behaviour of solar wall module in various setups for an extended 48-hour period of time, and 2) the performance of solar module with and without fine metal wires as heat exchange enhancers. Eight different solar wall module setups were assembled and tested in a precisely controlled environment. The study reassures observations and conclusions made in previous research and provides new conclusions. Modules that can harvest more solar radiation in the charging phase are exposed to higher heat losses at the discharge phase to the external environment. Module setups that reach stable heat flow fast and respectively melt PCM volume effectively, create a problem of not managing to harvest more of the available solar radiation.
Highlights
Directive 2010/31/EU urged building energy efficiency declaring that by the end of 2020 all new buildings must comply with nearly zero energy building (NZEB) definition [1]. 40 % of primary energy and respective GHG emissions are generally produced by buildings and construction according to International Energy Agency (IEA) reports [2]
− The study shows solar module behaviour in the first 24 hours similar to results previously tested confirming the observations of previous studies
− Module Setups that allow for reaching stable heat flow fast and respectively melt phase-change materials (PCM) volume more effectively, create a problem of not managing to harvest more of the available solar radiation
Summary
Directive 2010/31/EU urged building energy efficiency declaring that by the end of 2020 all new buildings must comply with nearly zero energy building (NZEB) definition [1]. Highly energy efficient and decarbonized building stock and effective long-term renovation strategies should deliver the necessary progress for conversion of exis ting buildings into nearly zero-energy buildings. Equal acces s to financing must be provided to worst performing segments of the national building stock, social housing, and other consumers with limited options for improvement [3]. Long-term renovation strategies should be established in order to support renovation of national stock of residential and non-residential buildings, reaching decarbonized building stock by 2050 [3]. Nearly-zero and plus energy buildings have been researched and developed extensively and renewable energy plays a significant role in reaching these energy performance characteristics. Energy storage problems arise and need to be solved [4]–[6]
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