Home cooling panel based on PV and waste cooking oil

A team of researchers from India’s Aarupadai Veedu Institute of Technology has developed a simulated model of a home cooling panel that combines photovoltaic power, thermoelectric cooling, and waste cooking oil as a phase change material. The system aims to provide an environmentally friendly alternative to conventional air conditioning, with potential for significant energy savings and carbon reduction.

The cooling panel integrates a PV module to generate electricity from sunlight, which directly powers a thermoelectric (TE) module. The TE module is thermally coupled with a layer of waste palm oil-based phase change material (PCM), which stores and releases thermal energy through phase transitions. During the day, the PV supplies power to the TE, which removes heat from the PCM, effectively cooling it and storing thermal capacity. At night, when solar power is unavailable, the PCM releases stored heat, helping to maintain lower indoor temperatures. Simulations using multi-fidelity models indicate that a single panel can deliver approximately 6 to 15 kWh of cooling per day, reduce peak indoor temperatures by up to 3°C, and shift cooling loads by about three hours. The study also estimates a payback period of three to four years, potentially reduced to two with incentives, and a life cycle analysis shows a carbon payback period of less than two years, with the panel avoiding roughly 1.2 tonnes of CO₂ annually while reutilizing 40 kilograms of waste cooking oil.

Potential Impact of PV-Waste Oil Cooling Panels

This development could significantly reduce residential energy consumption for cooling, especially in sunny regions. By utilizing waste cooking oil as a low-cost, bio-based phase change material, the system offers an environmentally sustainable alternative to conventional cooling methods. The promising simulation results suggest that widespread adoption could lower carbon emissions and reduce dependence on grid electricity, which is often generated from fossil fuels. Additionally, the use of waste resources aligns with circular economy principles, transforming waste into valuable thermal storage material. If scaled effectively, this technology could influence future building design standards and promote more sustainable urban living.

Background on Solar-Driven Cooling Technologies

Home cooling systems that incorporate renewable energy sources and thermal storage are gaining attention as solutions to reduce energy demand and emissions. Previous approaches have included circulating water systems, phase change materials, and thermoelectric devices. The integration of PV modules with thermal storage is an emerging area, with ongoing research into cost-effective, bio-based materials. The current study builds on these efforts by demonstrating a novel combination of PV, thermoelectric cooling, and waste cooking oil PCM, highlighting the potential for sustainable, off-grid cooling solutions. Prior to this, most commercial systems relied heavily on electricity from the grid or fossil fuels, with limited focus on bio-based or waste-derived materials.

“Our study introduces a multi-fidelity modeling approach for solar-driven hybrid cooling panels using waste cooking oil as a phase change material.”

— an anonymous researcher

Long-Term Performance and Scalability Challenges

It is not yet clear how the system will perform under real climatic conditions over extended periods. Long-term durability of the PCM, potential degradation, and system maintenance requirements remain to be tested in real-world applications. Additionally, scalability of manufacturing, cost implications at larger scales, and integration with existing building infrastructure are still under investigation. Further research is needed to confirm the economic viability and environmental benefits in diverse settings.

Next Steps for Development and Deployment

The research team plans to conduct real-world pilot projects to evaluate long-term performance and durability. They will also explore improvements in PCM formulations to enhance thermal stability and energy storage capacity. Efforts are underway to develop scalable manufacturing processes, incorporate AI-driven control systems for optimized operation, and seek regulatory approval and incentives. These steps aim to facilitate commercial adoption and integration into sustainable building designs.

Key Questions

How does the cooling panel work?

The panel uses a PV module to generate electricity, which powers a thermoelectric device that cools a waste cooking oil-based phase change material. The PCM stores thermal energy during the day and releases it at night to help maintain lower indoor temperatures.

What are the environmental benefits?

The system reuses waste cooking oil, reducing waste and reliance on fossil fuels. It also lowers indoor cooling energy consumption, which can significantly cut carbon emissions associated with traditional air conditioning.

When might this technology be available for home use?

While promising, the technology is still in the simulation and testing phase. Commercial deployment could take several years, pending further testing, scaling, and regulatory approval.

What are the main challenges ahead?

Key challenges include ensuring long-term performance, developing cost-effective manufacturing, and integrating the system into existing buildings at scale.

Source: PV Magazine