STUDY ON OPTIMAL CONTROL STRATEGY WITH INDOOR-OUTDOOR TEMPERATURE COOPERATION FOR AIR SOURCE HEAT PUMPS BASED ON FUZZY ADAPTIVE PI CONTROLLER

Shi Lun; Guo Wei; Tao Peng; Sun Shengbo

doi:10.19912/j.0254-0096.tynxb.2024-0070

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (5) : 128-135. DOI: 10.19912/j.0254-0096.tynxb.2024-0070

STUDY ON OPTIMAL CONTROL STRATEGY WITH INDOOR-OUTDOOR TEMPERATURE COOPERATION FOR AIR SOURCE HEAT PUMPS BASED ON FUZZY ADAPTIVE PI CONTROLLER

Sun Shengbo, Shi Lun, Guo Wei, Tao Peng

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Abstract

For a small-scale air source heat pump （ASHP）-integrated central air-conditioning system, this paper proposed an online optimal control strategy for supply-water temperature based on indoor and outdoor temperature coordination. This study aims to improve the indoor thermal environment control performance as well as reduce the energy consumption of the ASHP system. In the optimal control strategy, the real-time outdoor temperature is used as the main parameter for the feedforward optimization of the supply-water temperature, which responds quickly to the coolingload. The real-time indoor temperature is used as an auxiliary parameter for feedback-based optimization by using the fuzzy adaptive PI controller to modify the calculated supply-water temperature. The simulation model of ASHP-integrated central air-conditioning system is established by using TRNSYS software, substituting measured data such as equipment power and indoor and outdoor temperatures from an office building in Shijiazhuang, Hebei Province. The simulation model is used to validate that the accuracy and robustness of the indoor temperature control under the optimization strategy are superior. The results demonstrate that the energy consumptions of the air-conditioning system is significantly reduced under both high-load and light-load conditions. The system energy saving rate is 19.64% and 33.64% for the high-load condition and the light-load conditions, respectively. The proposed indoor-outdoor temperature cooperative control strategy has advantages of small-level algorithm computational cost and easy-to-deploy in conventional temperature controller.

Key words

air source heat pumps / temperature control / adaptive algorithms / collaborative optimization / energy efficiency of air conditioning

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Sun Shengbo, Shi Lun, Guo Wei, Tao Peng. STUDY ON OPTIMAL CONTROL STRATEGY WITH INDOOR-OUTDOOR TEMPERATURE COOPERATION FOR AIR SOURCE HEAT PUMPS BASED ON FUZZY ADAPTIVE PI CONTROLLER[J]. Acta Energiae Solaris Sinica. 2025, 46(5): 128-135 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0070

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