Abstract
Displacement ventilation is a proven method of providing conditioned air to enclosed spaces with the aim to deliver good air quality and thermal comfort while reducing the amount of energy required to operate the system. Until now, the practical applications of displacement ventilation have been exclusive to providing ventilation and cooling to large open spaces with high ceilings. The provision of heating through displacement ventilation has traditionally been discouraged, out of concern that warm air supplied at the floor level would rise straight to the ceiling level without providing heat to the occupied space. Hence, a separate heating system is regularly integrated with the displacement ventilation in cold climates, increasing the cost and energy use of the system. This paper goes beyond the common industry practice and explores the possibility of using displacement ventilation to provide heating without any additional heating system. It reports on experimental investigations conducted in laboratory and field settings, and numerical simulation of these studies, all aimed at investigating the application of displacement ventilation for providing a comfortable indoor environment in winter by preheating the space prior to occupancy. The experimental results confirm that the proposed concept of providing space heating in unoccupied periods without a separate heating system is possible with displacement ventilation.
Highlights
Accepted: 5 February 2021In modern societies, people are spending increasingly more time in indoor environments
The results of numerical simulation conducted using IDA Indoor Climate and Energy (IDA-ICE) simulation software for the two lab tests and one field test performed, respectively, in the scaled mock-up and the actual classroom are presented
The primary objective of this paper is to study and to enhance the understanding of usingThe displacement achieving a comfortable environment in unde primary ventilation objective for of this paper is to studyindoor and to enhance the winter without the requirement of a separate heating system
Summary
Accepted: 5 February 2021In modern societies, people are spending increasingly more time in indoor environments. Due to the wide spectrum of pollutants and contaminants present in these confined environments, indoor air quality (IAQ) has become a matter of great importance [1]. It has been repeatedly and conclusively demonstrated that indoor air quality has a significant influence on human health, comfort, and productivity [2,3]. The most common method for controlling and improving indoor air quality is the dilution of indoor pollutants and contaminants by providing clean air through ventilation.
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