Abstract

A novel DCV-system controls the air-change rate for each apartment in multifamily buildings based on two indoor air parameters: 1) the moisture load (supply), and 2) volatile organic compounds. With a central fan, but decentralized control boxes placed outside each apartment, the system controls the air-change rate for each apartment. This paper’s main aim is to determine the potential of this DCV-system, through a case study, to: 1) achieve good IAQ, 2) handle the moisture loads appropriately, and 3) achieve good energy efficiency in multifamily buildings. Furthermore, the paper aims to assess the possibility to achieve good IAQ by validating the DCV-system’s VOC-controls through measurements of CO₂ in apartments. Field measurements show that the system responds appropriately to apartment-specific loads, and that acceptable emission and moisture loads are achieved in most apartments in the case study. The impact that the system has on the energy use was assessed through calculations based on the field measurements. The calculations show that the DCV-system saves energy used for heating the supply-air by 86% in comparison to a mechanically balanced ventilation system without heat recovery, and 22% in comparison to the same system but with heat recovery.

摘要

一种新颖的 DCV 系统根据两个室内空气参数控制多户住宅中每个公寓的换气率：1)水分负荷（供应）和 2)挥发性有机化合物。通过中央风扇，但分散的控制箱放置在每间公寓外，该系统控制每间公寓的换气率。本文的主要目的是通过案例研究确定该 DCV 系统的潜力：1) 实现良好的室内空气质量，2) 适当地处理湿气负荷，以及 3) 在多户建筑中实现良好的能源效率。此外，本文旨在通过测量 CO _{2验证 DCV 系统的 VOC 控制来评估实现良好 IAQ 的可能性}在公寓里。现场测量表明，该系统对特定于公寓的负载做出了适当的响应，并且在案例研究中，大多数公寓都达到了可接受的排放和湿气负载。通过基于现场测量的计算来评估系统对能源使用的影响。计算表明，与没有热回收的机械平衡通风系统相比，DCV 系统用于加热送风的能源节省了 86%，与具有热回收的相同系统相比，节省了 22%。