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Development and In-situ validation of a multi-zone demand-controlled ventilation strategy using a limited number of sensors

机译：使用有限数量的传感器开发和现场验证多区域需求控制的通风策略

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摘要

This paper presents a new strategy using a limited number of sensors for demand-controlled ventilation (DCV) of multi-zone office buildings. The conventional CO_2-based demand-controlled ventilation strategy for multi-zone offices requires CO_2 sensors and supply airflow meters being installed in all zones. However, in many practical cases, CO_2 sensors might not be available or not necessary. To control the outdoor airflow based on actual occupancy variations in such cases, a DCV strategy with two implementing schemes is developed for different sensor availabilities. The first scheme is used for the situation when CO_2 sensors in individual zones are not available but the airflow meters for individual zones are installed. The second scheme is used for the conditions when CO_2 sensors and airflow meters in individual zones are not available. These two schemes use two different approaches to estimate the outdoor airflow fraction of the critical zone approximately. Both schemes only require the CO_2 sensor in the main return air to dynamically detect the total occupancy number. The developed strategy is implemented and validated in a high-rise office building in Hong Kong. The site test results show that the strategy can achieve significant energy saving while maintaining acceptable IAQ in the situations where only limited sensors are available.
机译：本文提出了一种使用有限数量的传感器进行多区域办公楼需求控制通风（DCV）的新策略。传统的基于CO_2的多区域办公室按需控制的通风策略要求在所有区域中都安装CO_2传感器和送风流量计。但是，在许多实际情况下，CO_2传感器可能不可用或不必要。为了在这种情况下基于实际占用率变化来控制室外气流，针对不同的传感器可用性，开发了具有两种实施方案的DCV策略。第一种方案用于以下情况：单个区域中的CO_2传感器不可用，但安装了单个区域的空气流量计。第二种方案用于无法使用各个区域中的CO_2传感器和空气流量计的情况。这两种方案使用两种不同的方法来近似估计关键区域的室外气流比例。两种方案都仅需要主回风中的CO_2传感器来动态检测总占用人数。制定的策略在香港的一幢高层办公楼中得到实施和验证。现场测试结果表明，在只有有限传感器的情况下，该策略可以节省大量能源，同时保持可接受的IAQ。

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