Archive · 4 Aug 2025
Solar Thermal System Powers Monastery in Leh-Ladakh
Imagine the sun's heat as a powerful tool.
Solar thermal is like directly using that heat to warm things up, like cooking or drying.
It's more efficient than solar panels when you need heat.
Scientists are building a special system in a monastery to do this.
The system cleverly uses the heat in steps: first for cooking, then for drying, and finally for warming the building.
It also stores the heat, so it can work even when the sun isn't shining.
This method is also better for the environment and good for large scale projects, unlike solar panels.
Solar thermal technology converts sunlight into heat, offering higher efficiency than solar photovoltaics for heat-intensive applications.
A joint project by IIT-Madras and IIT-Delhi is implementing a solar thermal system in Leh-Ladakh, India, at a Buddhist monastery.
The project uses a 'cascade' design to maximize energy use, directing heat from cooking to agricultural drying, then to space heating.
The system incorporates thermal energy storage using phase-change materials to ensure continuous operation, even without sunlight.
Solar thermal systems are viewed as having lower environmental impacts due to easily recyclable components, unlike PV panels.
- Who
- A joint project by IIT-Madras and IIT-Delhi.
- What
- A solar thermal system is being implemented in Leh-Ladakh to provide heat for a monastery.
- When
- Deployment in Leh is expected by next summer.
- Where
- Leh-Ladakh, India.
- Why
- To provide a more efficient, sustainable, and cost-effective heating solution and demonstrate the effectiveness of solar thermal technology.
Solar Thermal Advocates
Solar PV Focus
Efficiency vs. Cost
Solar Thermal Advocates
Solar thermal offers higher efficiency for applications requiring heat compared to solar PV.
Solar PV Focus
Solar PV has become more popular due to falling prices, and is edging solar thermal out of the market
- Technology
- Solar Thermal
- Location
- Leh-Ladakh, India
- Applications
- Cooking, drying, space heating
- Efficiency
- Upwards of 80% (solar thermal)
- System Capacity
- 300 kilowatts
- Heat Transfer Fluid
- Synthetic oil
- Storage Method
- Phase-change materials (PCMs)