Presentation Title

Energy Conservation and Performance enhancement for Building Integrated Photovoltaics

Faculty Mentor

Sohail Zaidi

Start Date

23-11-2019 10:45 AM

End Date

23-11-2019 11:30 AM

Location

150

Session

poster 4

Type of Presentation

Poster

Subject Area

engineering_computer_science

Abstract

Decarbonization of the energy sector is necessary to address concerns about global warming. Rooftop solar panels are a promising technology that partially fills this need. However, the performance of these panels is dependent on the environmental conditions (~0.5%/ °C reduction in efficiency). Previous work at SJSU indicated that the output of the solar panel varied as the environmental conditions (temperature and humidity) were changed (NCUR-2018, Bourang and Zaidi). Lower surface temperatures may improve the panel’s efficiency and may prolong its lifetime. Additionally, the heated water output from the panel can be repurposed to save energy. To realize these goals, a solar panel (SPR-320-E-WHT-D) was actively cooled with water. The water flowed through square, aluminum tubes (1” diameter, 48” length and 1/20” wall thickness) which were attached to the back of the panel. Temperatures were recorded at multiple locations on the panel using a Keysight multi-channel data acquisition system. Preliminary results indicated that panel temperature was reduced by 15%, however the water lost too much heat due to conduction through the aluminum tubes. In recent work, an acrylic heat exchanger (48”×23”×1”) was machined to have multiple flow channels for water to flow directly over the panel’s back surface. This heat exchanger was waterjet machined and features multiple thermocouple ports for recording temperatures. The panel, along with its instrumentation, was mounted on an adjustable rack. The temperatures of the panel’s top and bottom surfaces and radiation flux over the top surface were recorded. Inlet and outlet water temperatures were recorded to monitor the energy collected by the heated water. In this presentation, experimental results will be presented and discussed in a greater detail. Theoretical estimates on panel heat flow were made using MATLAB codes and will also be included in the final presentation.

This document is currently not available here.

Share

COinS
 
Nov 23rd, 10:45 AM Nov 23rd, 11:30 AM

Energy Conservation and Performance enhancement for Building Integrated Photovoltaics

150

Decarbonization of the energy sector is necessary to address concerns about global warming. Rooftop solar panels are a promising technology that partially fills this need. However, the performance of these panels is dependent on the environmental conditions (~0.5%/ °C reduction in efficiency). Previous work at SJSU indicated that the output of the solar panel varied as the environmental conditions (temperature and humidity) were changed (NCUR-2018, Bourang and Zaidi). Lower surface temperatures may improve the panel’s efficiency and may prolong its lifetime. Additionally, the heated water output from the panel can be repurposed to save energy. To realize these goals, a solar panel (SPR-320-E-WHT-D) was actively cooled with water. The water flowed through square, aluminum tubes (1” diameter, 48” length and 1/20” wall thickness) which were attached to the back of the panel. Temperatures were recorded at multiple locations on the panel using a Keysight multi-channel data acquisition system. Preliminary results indicated that panel temperature was reduced by 15%, however the water lost too much heat due to conduction through the aluminum tubes. In recent work, an acrylic heat exchanger (48”×23”×1”) was machined to have multiple flow channels for water to flow directly over the panel’s back surface. This heat exchanger was waterjet machined and features multiple thermocouple ports for recording temperatures. The panel, along with its instrumentation, was mounted on an adjustable rack. The temperatures of the panel’s top and bottom surfaces and radiation flux over the top surface were recorded. Inlet and outlet water temperatures were recorded to monitor the energy collected by the heated water. In this presentation, experimental results will be presented and discussed in a greater detail. Theoretical estimates on panel heat flow were made using MATLAB codes and will also be included in the final presentation.