Optimization of the operational energy of tankless water heaters

Abstract 

"A full three-dimensional numerical model is being performed to study the thermal and hydraulic performance of the heat exchanger inside the tankless water heaters. Heat exchangers with different U shape tube aspect ratios have been numerically tested, to improve durability by reducing occurrences of a blockage, and to maintain higher temperatures on the upper finned coils. Without any additional cost for the manufacturing process. A comparative study between wavey fins and plain fins has been carried out since the corrugated feature of wavy fins can increase the compactness and lengthen the airflow path, thereby yielding higher heat transfer performance than the plain fins.

The expected output of experimental setup is to raise the level of the project from TRL 3 to TRL 4 (Technology validated in lab). Based on the numerical study output, a real model of heat exchangers will be tested using the proposed experimental setup. The project will also include the implementation of a predictive control strategy for more efficient and sustainable use of energy."