Embedded thermal energy storage (TES) systems in walls and floors are becoming increasingly popular in sustainable home design. These systems use phase-change materials (PCMs) or high-thermal-mass materials to store heat during the day and release it when needed, reducing reliance on active heating and cooling. While TES improves energy efficiency and comfort, it introduces unique challenges for Energy Performance Certificate (EPC) assessments. Standard EPC models may not fully account for the dynamic thermal behavior of these integrated storage systems.

Key EPC Challenges

1. Non-Linear Thermal Behavior
TES systems absorb and release energy based on temperature differentials and phase changes, creating time-dependent heat flows. EPC models must include dynamic thermal simulations to capture these effects accurately.

2. Impact on HVAC Load Shifting
Thermal storage can reduce peak heating and cooling demands but may shift energy loads to off-peak periods. EPC assessments need to model these shifts to ensure realistic ratings.

3. Integration with Renewable Energy Systems
Homes with TES often use solar panels, heat pumps, or other renewables. EPC calculations must consider the interaction between stored thermal energy and these systems for accurate efficiency evaluation.

4. Seasonal and Daily Performance Variations
The effectiveness of embedded TES depends on seasonal temperatures and daily occupancy patterns. EPC assessments should incorporate long-term performance simulations.

5. Sensor and Monitoring Requirements
Dynamic TES systems require monitoring of wall and floor temperatures, phase-change activity, and energy flows to provide accurate data for EPC modeling.

Strategies for Accurate EPC Assessment

  • Dynamic Thermal Modeling: Simulate the energy absorption and release of TES in walls and floors. Learn more on our About Us page.

  • HVAC Load Analysis: Model peak reduction and load shifting due to thermal storage. Book an assessment here.

  • Renewable Energy Integration: Include interactions between TES and solar or heat pump systems in EPC calculations. Check our services.

  • Seasonal Performance Simulation: Assess TES efficiency across different seasons and occupancy patterns. Learn about our pricing.

  • Monitoring and Data Collection: Utilize sensors for precise temperature and energy flow measurements to improve EPC accuracy.

Contact EPC Rate

Homes with embedded thermal energy storage require specialized EPC assessments to ensure reliable and precise energy efficiency ratings. For expert consultation and tailored evaluation, contact EPC Rate.