Analysis and solution for renewable energy load matching for a single-family house

作者：Cao Sunliang^*; Hasan Ala; Siren Kai

来源：Energy and Buildings, 2013, 65: 398-411.

DOI：10.1016/j.enbuild.2013.06.013

• Photovoltaic (PV)
• Micro-wind turbine
• Hybrid thermal-electrical storage
• Mismatch
• Single-family house

This paper conducts analyses and proposes solutions for reducing mismatch between renewable energy (RE) production and electrical demand from a 150 m(2) single-family house. The RE options are photovoltaic (PV) and micro-wind turbine. This paper mainly focuses on the situation when grid feed-in is not available, but a brief economic analysis with grid feed-in is also conducted at the end of the paper. This paper specially investigates the influence of electrical storage in batteries and thermal storage in a domestic hot water (DHW) tank with suitable RE-DHW recharging strategies. The simulation results show that the recharging strategy of excess renewable electricity to a DHW storage tank with one day%26apos;s DHW volume is more technically and economically effective than using electrical battery in reducing annual mismatch. Even without battery, the improvement in reducing mismatch can be 12.7-23.3% simply by using the RE-DHW recharging strategy. Furthermore, PV with 2-axis solar tracking strategy is not economically feasible in the Nordic climate, whereas south-facing PV with a 45 fixed tilt angle is recommended. Moreover, from both the energy and economic points of view, the increased hub height with multiple turbines is preferable for the application with a 6.64-16.2% improvement in reducing mismatch.

• 出版日期2013-10