Short answer

Integrate fins and optimize channel geometry and airflow for enhanced PV/T system performance.

Field
Modelling
Source
International Journal of Energy Research (2019)
Method
Computational Fluid Dynamics (CFD) simulation
Evidence
Strong effect

Incorporating extended surfaces (fins) into photovoltaic/thermal (PV/T) systems significantly enhances their overall efficiency and thermal performance. This modelling research insight is drawn from a 2019 study published in International Journal of Energy Research. Using Computational fluid dynamics (cfd) simulation, researchers explored how this design variable affects real-world outcomes. The key design takeaway: Integrate fins and optimize channel geometry and airflow for enhanced PV/T system performance.

Study
ModellingHigh ImpactStrong effect

Finned surfaces boost PV/T system efficiency by up to 19%

Incorporating extended surfaces (fins) into photovoltaic/thermal (PV/T) systems significantly enhances their overall efficiency and thermal performance.

International Journal of Energy Research · 2019

01

Key Findings

  • 01Adding fins to the air channel of a PV/T system can improve overall efficiency by up to 19%.
  • 02Narrow channel geometries, a collector length of 1.5 m, a channel height of 1 cm, and an air velocity of 2.3 m/s were identified as optimal conditions for maximum efficiency and outlet air temperature.
  • 03Channel height and air velocity were found to have the greatest impact on system efficiency and outlet air temperature.
02

Application

Design takeaway

Integrate fins and optimize channel geometry and airflow for enhanced PV/T system performance.

How to apply

When designing or specifying PV/T systems, evaluate the potential benefit of adding fins to the air channels and carefully consider the impact of channel height and air velocity on performance.

Project actions

  • 01Use simulation software to model different fin designs and their impact on heat transfer.
  • 02Consider the trade-offs between increased efficiency and manufacturing complexity when adding fins.
03

Method & Evidence

AimTo numerically investigate the impact of extended surfaces on the performance of photovoltaic/thermal (PV/T) systems and identify optimal design parameters.
MethodComputational Fluid Dynamics (CFD) simulation
ProcedureA commercial CFD solver (ANSYS-FLUENT) was used to simulate a PV/T system. An effective thermal conductivity approach simplified the simulation of natural convection. Solar radiation was directly incorporated into the energy equation. The study included simulations with and without finned surfaces, parametric analyses of design and operating conditions, and optimization using response surface methodology.
ContextRenewable energy systems, specifically photovoltaic/thermal (PV/T) technology.

Variables

IV["Presence of fins","Channel height","Air velocity","Collector length"]
DV["Overall efficiency of the PV/T system","Outlet air temperature","PV temperature"]
CV["Solar radiation intensity","Ambient temperature","Material properties of PV cells and absorber plate"]
04

Strengths & Limitations

Strengths

  • +Utilizes a validated CFD model for simulation.
  • +Conducts comprehensive parametric and optimization studies.

Limitations

The simulation may not perfectly replicate real-world conditions, such as variations in material properties or complex weather patterns.

Reliability & validity

The study's validity is supported by comparing simulation results to experimental data from the literature, showing low root-mean-square errors for PV temperature (7%) and outlet air temperature (2%). The comprehensive parametric and optimization analyses contribute to the robustness of the findings.

Think critically

To what extent do the simplified assumptions in the CFD model (e.g., effective thermal conductivity) affect the predicted performance gains from fins, and how might a more detailed simulation or experimental approach yield different results?

05

Design Principles

"Enhance heat transfer in integrated energy systems through passive design elements like extended surfaces."

This finding is crucial for designers developing integrated renewable energy solutions. By understanding the performance gains from specific design modifications like fins, engineers can optimize energy capture and thermal management, leading to more effective and economically viable PV/T systems.

06

What This Means for Your Design

Adding fins to the back of solar panels that also heat air can make them work much better, increasing their energy output by up to 19%.

How to use in your project

  • 1.Reference this study when discussing methods to improve the efficiency of energy generation systems in your design project.
  • 2.Use the findings on optimal parameters to inform your own design choices or to benchmark your results.
07

Add to My Project

08

Quick Cite

Paragraph starter

Numerical studies, such as the one by Kalkan et al. (2019), have demonstrated that incorporating extended surfaces (fins) into photovoltaic/thermal (PV/T) systems can lead to substantial improvements in overall efficiency, with gains of up to 19% observed. This highlights the effectiveness of passive design elements in enhancing heat transfer and energy recovery within integrated renewable energy technologies.

09

Source

International Journal of Energy Research

Numerical study on photovoltaic/thermal systems with extended surfaces

journal · 2019

View source

Questions About This Research

What does the research say about finned surfaces boost pv/t system efficiency by up to 19%?
Integrate fins and optimize channel geometry and airflow for enhanced PV/T system performance. Evidence: International Journal of Energy Research (2019).
Why does "Finned surfaces boost PV/T system efficiency by up to 19%" matter for design?
This finding is crucial for designers developing integrated renewable energy solutions. By understanding the performance gains from specific design modifications like fins, engineers can optimize energy capture and thermal management, leading to more effective and economically viable PV/T systems.
How can designers apply this research?
Integrate fins and optimize channel geometry and airflow for enhanced PV/T system performance.
What were the main findings?
Adding fins to the air channel of a PV/T system can improve overall efficiency by up to 19%.. Narrow channel geometries, a collector length of 1.5 m, a channel height of 1 cm, and an air velocity of 2.3 m/s were identified as optimal conditions for maximum efficiency and outlet air temperature.. Channel height and air velocity were found to have the greatest impact on system efficiency and outlet air temperature.
What research method was used?
Computational Fluid Dynamics (CFD) simulation.
How strong is the evidence?
Evidence strength is rated Strong effect, based on a 2019 journal from International Journal of Energy Research.
What should I do differently in my next project?
When designing or specifying PV/T systems, evaluate the potential benefit of adding fins to the air channels and carefully consider the impact of channel height and air velocity on performance.
What are the limitations?
The study is based on numerical simulations and may require experimental validation. The effective thermal conductivity approach simplifies natural convection, which might not capture all nuances of airflow.