Abstract
This paper proposes the series connected fuzzy-proportional integral (SF-PI) controller, which is composed of the fuzzy control and the PI controller to improve temperature control performance of dehumidifier using a thermoelectric element. The control of conventional PI controller usually uses fixed gain. For that reason, it is limited in achieving satisfactory control performance in both transient-state and steady-state. The fuzzy control within SF-PI controller adjusts the input value of PI controller according to operating condition. The PI controller within the SF-PI controller controls the temperature of the thermoelectric element using that value. The SF-PI controller can achieve more accurate temperature control than a conventional PI controller for that reason. The SF-PI controller has been tested for various indoor environmental conditions such as temperature and relative humidity conditions. The average temperature error of the SF-PI controller between the reference temperature and the thermoelectric element temperature is 22% of traditional PI’s value and consumption power is reduced by about 10%. Therefore, the SF-PI controller proposed in this paper can improved the performance of temperature control of dehumidifier using thermoelectric element. The power consumed by buildings accounts for a significant portion of the total power consumption, of which the air conditioner represents the largest energy consumer. In this paper, it is possible to reduce the energy consumption by improving the performance of the dehumidifier, one of the air conditioners, and it can be applied to various control fields in the future.
Highlights
Energy consumption is increasing globally and energy demand is expected to increase by 30%by 2040
This paper proposes applying the internet of thing (IoT) to dehumidifier, which is one of the Industry 4.0 techniques, and the method to improve the performance of dehumidifier using the thermoelectric element
This paper proposes the series connected fuzzy-proportional integral (SF-PI) controller consisting of fuzzy control and PI controller connection
Summary
Energy consumption is increasing globally and energy demand is expected to increase by 30%. Of residents have air conditioners [6] Such an air conditioning system is used for heating, ventilating, and cooling the room air, and it represents a financial burden for consumers since it is continuously used even in the peak load time of the building. Advantages of the compressor dehumidifier are that they are excellent in dehumidification performance in a climate of 15 ◦ C or higher and can be maintained only by increasing the room temperature by 1–2 ◦ C without cooling indoor air like an air conditioner. The Series Connected Fuzzy-PI (SF-PI) controller controls temperature of a dehumidifier using the thermoelectric element. The conventional PI controller has a limitation in improvement of the control performance in transient-state due to the fixed gain value To solve this problem, the SF-PI controller is configured, connecting the fuzzy controller and PI controller in series.
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