This paper studies a mechanism to investigate and to improve the energy efficiency of a solar water heating system (SWH) in a hospital building located in Singapore. We utilize the data collected from Internet-of-Things (IoT) to gain information on different environmental and operational aspects of the considered system, that determine opportunities for improving the efficiency of various sub-systems of the SWH, and develop control strategies for efficient operation of the overall system. Through the data collected by IoT, such as water flow, heat pump and water pump operational schedule, availability of solar, and electricity consumption, we perform a comprehensive energy audit to analyze the efficiency of sub-systems and the performance of overall system as well. Based on the insights obtained from data analysis, corresponding control strategies for various sub-systems are developed to improve the efficiency of the overall system and reduce the operational cost of the SWH. Finally, the effectiveness of the proposed control strategies is confirmed through experiment on the site of the considered SWH.

本文研究了一种机制，旨在研究和提高新加坡医院大楼中太阳能热水系统（SWH）的能源效率。我们利用从物联网（IoT）收集的数据来获取有关所考虑系统的不同环境和运营方面的信息，从而确定提高SWH各个子系统效率的机会，并制定有效的控制策略整个系统的运作。通过物联网收集的数据，例如水流量，热泵和水泵的运行时间表，太阳能的可用性以及用电量，我们执行了全面的能源审计，以分析子系统的效率以及整个系统的性能。根据从数据分析中获得的见解，开发了用于各种子系统的相应控制策略，以提高整个系统的效率并降低SWH的运营成本。最后，通过在所考虑的SWH现场进行实验，证实了所提出的控制策略的有效性。