the major bottleneck which restrict the development of the economy. As a
comprehensive utilization of solar energy, PV/T system is the future trend of solar
energy using.
This topic based on a PV/T component, mainly did the following work:
(1) Analyzed the heat transfer process of the PV/T component, then established
its heat transfer model on the basis of the flat plate collector heat transfer mode, which
was used to calculate thermal efficiency of the PV/T component and analysis the
relationship between the temperature and efficiency of pv cells.
(2) Built an experimental laboratory which with an standard resistance in the two
ends of pv cells to test the thermal and photovoltaic capacities. Control the inlet fluid
temperature, the dip angle and the flow rate of the PV/T system, tested different
capacities of the component with different working conditions.
(3) Analyzed the experimental data and discussed the influence of the PV/T
component capacities which were caused by different inlet fluid temperature, angle,
flow rate and the environment temperature. Then get the best working condition of the
PV/T component. Introduce integrated performance, and find the corresponding best
working condition.
By comparing theoretical calculation data and experimental test data can get the
conclusion as follows:
(1) Put a 50 Ω standard resistor in series at both ends of the integration
components, control the flow of 120L / h, inclination of 30 °, change the inlet
temperature and we get that at 30 ° C inlet temperature the integration components
with optimal value of both thermal efficiency and output power,the total thermal
efficiency of 35.97%, corresponding to the output power range to 29.40 to 30.51W.
(2) Control the flow of 120L / h, inlet temperature of 35 ° C, change the
inclination and we get that at the angle of 45 ° the integration component accepted the
most solar irradiance and optimal total thermal efficiency of 32.65%; angle has little
effect on the output power of integrated components when series a 50Ωstandard
resistor.
(3) Control the angle of 0 °, inlet temperature of 35 ° C, change the system flow
rate, we can get that 85L / h flow rate is the optimal conditionfor the integration
component,with the day total thermal efficiency of 25.89%; when series a
50Ωstandard resistor the component output power increases with the flow increasing,
theoutput power range at 120L / h condition is 24.02 ~ 29.19W.
(4) Analysis of the total efficiency, the inlet temperature at Ti = 30 ° C is the best
operating condition of integration components, corresponding to the total overall
efficiency of 43.69%; as the inclination at 45 ° angle is the best operating condition of
the integrated components, corresponding daily total efficiency of 41.35%; the flow
rate at 85L / h is the best condition of the integration components, corresponding to
the total efficiency of 43.69%.
Key Word: PV/T component ,theoretical modeling, experimental