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Cooling operation guidelines of thermally activated building system considering the condensation risk in hot and humid climate

机译：考虑炎热和潮湿气候的冷凝风险的热激活建筑系统的冷却操作指南

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摘要

One of the promising methods to reduce the peak load of a building is through the use of a Thermally Activated Building System (TABS), which uses the concrete structure as a thermal storage system. Owing to the large cooled surface of a TABS, the asynchronous characteristics of the TABS may cause a high risk of condensation. Previous research proposed to maintain the supply water temperature above the indoor dew point temperature or used sophisticated methods by optimizing the control algorithms with predictive models. However, in reality, the HVAC operators often stop operating TABS for a certain period of time when the outdoor humidity becomes significantly high based on their experiences. This study suggests simple guidelines in operator's level to increase the practical use of TABS by considering the condensation risk in hot and humid climate. Therefore, the weather conditions and the TABS system characteristics were analyzed and possible simple solutions for avoiding condensation were proposed.The possible condensation risk was evaluated with the building simulation and considering the infiltration was found to be the key factor for preventing condensation. During an unoccupied period, the HVAC system did not operate and humidity accumulated in the room. In most cases, the condensation risk became the highest before the day started. Due to the limitations on controlling the TABS and HVAC system, possible solutions as stopping the TABS operation in advance to raise the surface temperature of TABS and operating the HVAC couple of hours ahead for removing the humidity were evaluated. As a result, a separate strategy could not solve problems of occurring the condensation when the outdoor conditions maintained at high humidity with low air temperatures. In order to apply both strategies, the cooling operation guidelines with a simple calculation of indoor dewpoint temperature were proposed and could prevent the condensation at all times. (C) 2019 Elsevier B.V. All rights reserved.
机译：减少建筑物峰值负荷的有希望的方法之一是使用热敏构建系统（突片），该系统使用混凝土结构作为热存储系统。由于突片的大冷却表面，突片的异步特性可能导致高凝结的风险很高。以前的研究提出通过优化具有预测模型的控制算法来维持室内露点温度高于室内露点温度的供水温度或使用复杂的方法。然而，实际上，HVAC运算符通常在室外湿度基于其经验时，当室外湿度变得明显高的情况下，经常停止操作标签。本研究表明，通过考虑炎热和潮湿的气候的冷凝风险，运营商水平的简单准则可以增加标签的实际使用。因此，分析了天气条件和标签系统特性，提出了用于避免冷凝的可能简单的解决方案。通过建筑模拟评价可能的缩合风险，并考虑发现渗透是防止凝结的关键因素。在一个无人居住的时期，HVAC系统在房间内没有运行和湿度。在大多数情况下，在一天开始之前，冷凝风险成为最高的风险。由于控制突片和HVAC系统的限制，评估了可能的解决方案以提高突片的操作以提高突片的表面温度并操作前方的HVAC几个小时以去除湿度。结果，当室外条件保持在高湿度的高湿度下，单独的策略无法解决发生凝结的问题。为了应用这两种策略，提出了简单计算室内露点温度的冷却运行指南，可以始终防止凝结。 （c）2019 Elsevier B.v.保留所有权利。

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