Numerical simulation and experimental analysis of frosting in air-to-air counterflow heat exchanger

The present project combines an experimental and numerical approach to be able to model the condensation and the frost formation in air-to-air counterflow plate heat exchangers. An optimized geometry will be proposed as well as frost prevention and defrosting strategies for air exchangers used in North America climate. The sensible heat recovery requirements in building codes still tend to go up. To achieve the required efficiency in a limited volume, the crossflow plate heat exchangers will be replaced by counterflow plate heat exchangers. In a Nordic climate, they are more problematic than the cross flow type because it tends to develop an ice buildup in the exhaust flow. It then requires the use of longer or more frequent defrosting cycles, which reduce their efficiency. The validated numerical model will consider the increased conduction resistance due to ice on top of the plates and the pressure loss.

Faculty Supervisor:

Hachimi Fellouah

Student:

Alexandre Coulombe

Partner:

Innergy Tech

Discipline:

Engineering - mechanical

Sector:

Other services (except public administration)

University:

Université de Sherbrooke