期刊
INDOOR AND BUILT ENVIRONMENT
卷 29, 期 6, 页码 768-774出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/1420326X19837340
关键词
Probability to return; Visitation frequency; Dilution capacity; Delivery capacity; Entrainment; Entrainment mixing factor
The purpose of this paper is to discuss the performance of air distribution systems intended for dilution of contaminants (e.g. mixing ventilation) and those intended for delivery of clean air to local regions within rooms (e.g. personalized ventilation). We first start by distinguishing the systems by their visiting frequency behaviour. Then, the performance of the systems with respect to their possibility to influence contaminant concentration in the room or regions within the room is dealt with. Dilution capacity concept for mixing systems is discussed, and delivery capacity concept for systems intended to deliver clean air locally is introduced. Various ways for supply of clean air to regions within the room are presented and their pros and cons are discussed. In delivery capacity systems, the most important single parameter is the entrainment of ambient air into the primary supply flow. Therefore, methods of determining entrainment in these systems need to be defined and the results should be included when describing the performance of the air terminal devices.
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