High-Performance Heat Recovery System (HPWRG) with up to 80% efficiency and secondary functions
Applications
Energy-efficient air conditioning of non-residential buildings, specifically for preheating outdoor air in winter and cooling in summer.
Features of the HPWRG System
Through optimized design (multiple heat exchanger stages with a maximum construction depth of 300 mm, based on a fin spacing of 2 mm per coil in counterflow configuration), precise intermediate medium control, and integrated regulation, a high efficiency level is achieved.
The medium flow within the heat exchanger (HX) is guided to achieve the highest possible counterflow. Crossflow portions have been minimized, and parallel flow portions are completely eliminated, as the heat transfer efficiency of the HX is significantly lower in parallel flow than in counterflow.
We therefore use a series connection of individual heat exchanger stages in counterflow, which must be precisely maintained, achieving a thermodynamic counterflow share of more than 99%.
The balance between the air volume flow and the water mass flow is of decisive importance. When the heat capacity flow rates of both media are equal, we achieve the highest heat recovery efficiency.
The HPWRG system can be used as a multifunctional heat recovery unit. This means that, in addition to the primary heat recovery function, additional features such as free cooling, domestic water preheating, or dehumidification cooling recovery can also be implemented.
Furthermore, post-heating or post-cooling can be efficiently achieved with the system without additional heaters or coolers.
Core Features of the HPWRG System
Optional system expansion
Indirect evaporative cooling via HYDROplus (adiabatic humidification on the exhaust air side and transfer of the resulting cooling capacity to the supply air side for additional cooling)
