Justification for the Outlooks of Design and Application of Local Recirculation Diffusers for Energy-efficient Ventilation Systems

摘要

A new scheme of ventilation system with local recirculation diffusers (LRD) was proposed. A local recirculation diffuser was designed. Requirement specifications for LRD capacity were developed. Proposals on the parameters of LRD were developed. The topic of improving the quality of internal air while keeping power consumption of the ventilation and air conditioning systems as low as possible has been getting increased attention in the past years[7], [5], [4], [3], [6], [2]. To date, the standard heat insulation level of the building envelope has grown significantly[9]. At the same time, significant amounts of heat are generated in certain types of public buildings, such as office premises, retail buildings, sports, and catering facilities, in course of their operation. Using traditional heating and ventilation solutions in the cold and transition seasons results in overconsumption of energy resources because the outdoor air is heated in the input unit up to a specified temperature (which usually equals the temperature of the air in the room) while the air conditioning system consumes cold to assimilate the heat generated internally. The aim of this research is to design a ventilation system with local recirculation diffusers that is capable of assimilating excessive internal heat by underheating the intake air. The article presents the ventilation system with local recirculation diffusers ("LRD"), the LRD design, requirements to LRD capacity, and proposals on the sets of LRD parameters.