The influence of simulation time-resolution on the matching between on-site micro-wind generation and building electric demand. Issue 5 (2nd September 2016)

• Record Type: Journal Article
• Authors: Cao, Sunliang; Sirén, Kai
• Is Part Of: Journal of building performance simulation. Volume 9:Issue 5(2016)
• Page Start: 449
• Page End: 468
• Publication Date: 2016-09-02
• Subjects: simulation time-resolution -- time-step -- energy matching -- energy mismatch -- building simulation -- micro-wind turbine; 690.0113
• DOI: 10.1080/19401493.2015.1077270
• Languages: English
• ISSNs: 1940-1493

Abstract

Abstract : This paper is to investigate the unique impact of simulation time-resolutions on energy matching between on-site micro-wind turbine and household electric demand. The focused indices are on-site electrical energy fraction (OEFe), on-site electrical energy matching (OEMe), and their errors (eOEF and eOEM ). The methodology consists of parametric analyses with respect to time-resolution levels, averaging methods, demand profiles, turbine capacities, and wind conditions. Two averaging methods are used: 'Speed Averaging' and 'Power Averaging'. With a coarser resolution, two averaging effects have been found. One is an overestimation effect by both the averaging methods, which are more likely to be encountered especially when a high-resolution generation curve frequently crosses intermittent long spikes of a demand curve. The other effect is an underestimation effect on OEFe simultaneously occurring with the Speed Averaging Method under the conditions of (1) a low wind speed and (2) a high unstable wind speed and a low turbine capacity.