Efficient integration of energy active envelop (EAE) with low-temperature heating and high-temperature cooling

This project will investigate the technical possibilities and demonstrations of combining low-temperature heating (LTH) and high-temperature cooling (HTC) systems with energy active envelopes (EAE).

Project description

This integration will be studied in three stages:

  1. Using an energy active window (EAW) to shave and shift the peak loads while LTH and HTC systems cover the required base heating/cooling loads. EAW itself utilizes the low-grade energy, which is often wasted in a building such as a heating/cooling energy in a heat pump cycle.

  2. Developing an optimal control scheme to efficiently synchronize the performance of EAW and LTH/HTC systems in design conditions.

  3. Evaluating the performance and contributions of the combined systems with comparisons to the reference system where passive envelopes are installed using LCC/LCA.

This investigation includes thorough dynamic simulations in both component level (EAW) and system level (combined EAW and LTH/HTC systems) as well as physical demonstration and real time measurements of the suggested system; this is in collaboration with the KTH Live-In Lab. LCA and LCC analyses are performed to provide feasibilities and cost-effectiveness validations for future large-scale implementations.

The aims of this research work are to prove the EAW concept by computer analytical investigations, study the feasibility of EAW integration with LTH/HTC systems in order to reduce peak heating/cooling demands, and cost/environmental impact effectiveness (LCC/LCA) of the integrated systems. The performance of the integrated systems are evaluated both by dynamic simulations and real-time measurements at the KTH Live-In Lab.

Project start year


Responsible / contact


Department of Energy Technology


Lowte AB, Department of Energy Technology, KTH, Department of Civil and Environmental Engineering at the University of Alberta, Canada, KTH Live-in-lab

Research areas

Smart buildings, low-temperature heating and high-temperature cooling, Active building envelope

Estimated time

2 years