TY - JOUR
T1 - Solar energy harvesting from the photovoltaic/thermal (PV/T) pavement
T2 - Energy performance analyses and comparison considering ground influence
AU - Zhang, Yijie
AU - Ma, Tao
AU - Yang, Hongxing
AU - Cao, Sunliang
AU - Wang, Yuhong
N1 - Funding Information:
The authors would like to appreciate the financial support from the Hong Kong Ph.D. Fellowship Scheme (HKPFS) and the Research Impact Fund (No.: R5007-18) of the Research Grant Council of the Hong Kong SAR Government.
Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2023/12
Y1 - 2023/12
N2 - Under the carbon neutrality targets, the easy-installation low-investment photovoltaic (PV) technology is vital, while the limited urban rooftop area and high building façade cost limit the onsite PV installation. Thus, harvesting solar energy from the road, namely pavement-integrated photovoltaic/thermal (PIPV(T)) technology, is promising. The 2D finite element PIPV(T) models are proposed and verified through the field test within 3% (cell temperature) and 7% (PV output) mean absolute percentage error. The parametric analyses on system designs (water tank volume, water velocity, water inlet temperature), weather conditions (solar irradiance, wind velocity), and ground boundary condition influence are conducted. The water inlet temperature acts as a minor factor, while tank volume and fluid velocity are crucial, i.e., a 32.76% thermal efficiency increase for a 125 L tank volume increase. Results show that over 0.2 L/s water flow rate is recommended for a 100 L water tank, and the solar irradiance increase adds to the thermal efficiency to 41.47% under 1000 W/m2 with 11.38% ground influence. The annual system performances for southern and northern metropolises are compared, with water tank variation considered. Results show that a small water tank leads to high temperature and low system thermal efficiency at 9.3% and 12.17% in Hong Kong and Beijing.
AB - Under the carbon neutrality targets, the easy-installation low-investment photovoltaic (PV) technology is vital, while the limited urban rooftop area and high building façade cost limit the onsite PV installation. Thus, harvesting solar energy from the road, namely pavement-integrated photovoltaic/thermal (PIPV(T)) technology, is promising. The 2D finite element PIPV(T) models are proposed and verified through the field test within 3% (cell temperature) and 7% (PV output) mean absolute percentage error. The parametric analyses on system designs (water tank volume, water velocity, water inlet temperature), weather conditions (solar irradiance, wind velocity), and ground boundary condition influence are conducted. The water inlet temperature acts as a minor factor, while tank volume and fluid velocity are crucial, i.e., a 32.76% thermal efficiency increase for a 125 L tank volume increase. Results show that over 0.2 L/s water flow rate is recommended for a 100 L water tank, and the solar irradiance increase adds to the thermal efficiency to 41.47% under 1000 W/m2 with 11.38% ground influence. The annual system performances for southern and northern metropolises are compared, with water tank variation considered. Results show that a small water tank leads to high temperature and low system thermal efficiency at 9.3% and 12.17% in Hong Kong and Beijing.
KW - Energy analysis
KW - Heat island effect mitigation
KW - Pavement integrated photovoltaic
KW - Photovoltaic/thermal
KW - Thermal-electrical model
UR - http://www.scopus.com/inward/record.url?scp=85171614672&partnerID=8YFLogxK
U2 - 10.1016/j.scs.2023.104895
DO - 10.1016/j.scs.2023.104895
M3 - Journal article
AN - SCOPUS:85171614672
SN - 2210-6707
VL - 99
JO - Sustainable Cities and Society
JF - Sustainable Cities and Society
M1 - 104895
ER -