Evaluation of Annual and Temporal Photovoltaic (Pv) Surplus Energy in Industrial Buildings: A Case Study Of 36 Industrial Parks In Wuhan, China

Abstract

This study provides a comprehensive analysis of photovoltaic (PV) surplus energy in 36 industrial parks in Wuhan, China, focusing on the balance between PV electricity generation and energy demands. The research utilized hourly data, combining 3D modeling from geographic information system (GIS) data and field surveys to determine PV production. Energy demand was estimated through simulations based on standard industrial building codes and field survey assumptions. Results show that approximately one-third of the industrial buildings studied exhibit significant PV surplus phenomena. A fifth of the cases exhibited more than 1000 hours of PV surplus, with an average PV surplus duration of 3.4 to 4.9 hours daily. Seven cases had over 1 GWh of PV surplus energy throughout the year, representing a substantial PV surplus that must be managed. The probability of PV surplus occurrence at noon was approximately 67% for cases with high PV self-sufficiency ratio, 45% for medium, and 14% for low, respectively. For the high self-sufficiency scenarios, a chance of over 30% to 60% is observed near noontime. A higher variance of the dynamic PV surplus surge was also found in cases with higher PV self-sufficiency ratios, indicating a more challenging situation of PV overload in high-self sufficiency scenarios. Building morphology alone plays a role in such scenarios, suggesting that the design of buildings with various morphologies can potentially be used to manipulate PV surplus phenomena in terms of the occurrence of PV surplus.

Keywords: Energy balance, PV surplus, Industrial buildings, China