Renovating a house to aim for net-zero energy, thermal comfort, energy self-consumption and behavioural adaptation: A method proposed for ENEMANE HOUSE 2017

Oki, Reina; Tsuneoka, Yugo; Yamaguchi, Shingo; Sugano, Soma; Watanabe, Naoya; Hayashi, Yasuhiro; Wakao, Shinji; Tanabe, Shin Ichi

doi:10.1016/j.enbuild.2019.06.041

Cited by 11 publications

(2 citation statements)

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“…The Japanese government is aiming (i) to deliver net zero greenhouse gas emissions, and (ii) to be climate neutral by 2050. The building sector, as a major energy consumers, is expected to play an important role in meeting carbon emission reduction targets [ 1 ]. Currently, the residential sector is responsible for approximate 15% of final social energy consumption.…”

Section: Introductionmentioning

confidence: 99%

“…The Japanese Ministry of Economy, Trade, and Industry (METI), to encourage the development of low-energy buildings, launched a net zero energy target, for all new homes to be built to net zero by 2030. A large number of zero energy houses (ZEHs) feature on-site renewable energy resources and higher thermal insulation levels when compared to the current energy efficiency standards [ 1 , 2 ]. Integration of on-site renewable energy resources, and growing electrification of building energy consumption, play key roles in achieving ZEH in the operational stage.…”

Section: Introductionmentioning

confidence: 99%

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Operational Performance and Load Flexibility Analysis of Japanese Zero Energy House

Zhang

Gao

et al. 2021

IJERPH

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ZEHs (Zero Energy House) featuring energy-efficient designs and on-site renewable integration are being widely developed. This study introduced Japanese ZEHs with well-insulated thermal envelopes and investigated their detailed operational performances through on-site measurements and simulation models. Measurement data show that ZEHs effectively damped the variation of indoor air temperature compared to conventional houses, presenting great ability to retain inside heat energy, and are expected to potentially deliver energy flexibility as a virtual thermal energy storage medium. We developed a simplified thermal resistance–capacitance model for a house heating system; response behaviors were simulated under various scenarios. Results compared the variations of indoor temperature profiles and revealed the dependence of load flexibility on the building’s overall heat loss performance. We observed that overall heat loss rate played a crucial role in building heat energy storage efficiency; a well-insulated house shortened the heat-up time with less energy input, and extended the delayed period of indoor temperature under intermittent heating supply; a high set-point operative temperature and a low ambient temperature led to lower virtual thermal energy storage efficiency. The preheating strategy was simulated as an effective load-shifting approach in consuming surplus PV generation; approximately 50% of consumed PV generation could be shifted to replace grid import electricity for room heating during the occupied period.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%