Energy saving and performance analysis of air‐cooled photovoltaic panels

Abstract

The efficiency of photovoltaic (PV) cells is known to degrade with temperature, which limits their efficacy in the many regions around the world having a climate featuring high ambient temperatures. This study reports on field experiments supported by numerical modelling using Ansys steady-state thermal solver that demonstrates improved PV cell performance when coupled with a passive natural-convection-driven heat sink. Heat sink fin spacing was optimized for hot climatic conditions. Experiments were conducted on a pair of PV modules, one fitted with the heat sink, the other serving as a control. Temperature data were acquired at 15 minute intervals from 6.00 AM to 5.30 PM at both the front and rear of the modules. The heat sink respectively improved solar-to-electrical conversion efficiency and power output by 35% and almost 55%, and led to panel temperature reductions of up to 4 C and 3 C.

Safety and energy saving dispatching method of large power grid considering demand response

“…Among them, g and d represent the upper and lower bounds of the integration of power risk data, e k and l k represent ideal and standard estimation parameters, e and l represent the standard operating period of power risk data under current parameter conditions, a represents the dispersion retention factor of the dispatch system, and h Χ represents the standard variation of power risk data. Drawing on successful experiences from abroad and considering the current power management system in China, power generation enterprises and users are given partial autonomy to participate in power dispatch, to solve the bottleneck problem of energy-saving power dispatch, and fully leverage the participation and interaction of power generation enterprises and users to create economic and safety benefits [9,10] . Therefore, interactive energy-saving scheduling refers to granting power generation enterprises and users a certain degree of autonomy, allowing them to adjust their power generation and consumption plans towards energy-saving without affecting the safety of the power grid, and obtaining corresponding economic benefits from it.…”

Improving the Solar Cell Efficiency by Using Cooling Technique

“…The system was tested using MATLAB 2015b, calculating PVT, room temperature distribution, heat gain, and thermal efficiency. Jadallah et al, [7]. The study examined the impact of cooling on PV panel performance.…”