Thermal analysis and development of PID control for electronic expansion device of vapor compression refrigeration systems

Franco, Samuel; Guerrero, Jorge Recarte Henriquez; Ochoa, Álvaro; Costa, José Ângelo Peixoto da; Ferraz, K.A.

doi:10.1016/j.applthermaleng.2022.118130

Cited by 12 publications

(5 citation statements)

References 33 publications

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“…Moreover, the selection of PI control is supported by research on the process of designing and manufacturing automatic expansion valve controls using a PI control system, to control the process of controlling the temperature of the evaporator chamber to obtain more optimal heating results. Where the results of this study are the PI control system on the automatic expansion valve, the heater process is faster and the energy required is much more efficient [13].…”

Section: Previous Researchmentioning

confidence: 93%

Implementation of proportional–integral control in Baglog steamer temperature control

et al. 2022

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Sterilization is the oyster mushroom cultivation process. Sterilization is used to kill nuisance microorganisms that can inhibit mushroom growth. The sterilization process is 8 hours at a temperature of 70–95 oC. This process of frequent breakdown is caused by the unstable temperature sterilization space and is controlled manually. Based on these problems, the right solution is to use a steamer that can be controlled automatically using the proportional–integral (PI) control method. PI controller consists of proportional gain and integral gain. To determine the value of proportional gain and integral gain, this study used the Ziegler-Nichols tuning method using the S curve. The results of the PI control parameters obtained the value of Kp=25.2 and Ki=0.302. Thus, producing a transient response graph with Mp=94.5; Os=0.45; PO=0.47; Tr=16,440 s. The system can work according to setpoint 95 oC and maintain a stable temperature according to the setpoint with these results. And the sterilization time becomes fast from 8 hours to 6 hours.

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Section: Previous Researchmentioning

confidence: 93%

Implementation of proportional–integral control in Baglog steamer temperature control

et al. 2022

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“…The VCC refrigeration system consists of four main components: compressor, condenser, expansion device, and evaporator, which are connected to produce the refrigeration effect through thermodynamic processes of compression, condensation, expansion, and evaporation [5,6]. There are many thermodynamic losses associated with the operation of vapour compression that need to be addressed to provide high system performance, including constant enthalpy expansion due to high discharge temperature of the refrigerant, large power consumptions, rise in the condenser heat rejection, large throttling losses and drop in refrigeration capacity [7,8]. Shah et al, carried out a survey of the global air conditioning market revealing that the average efficiency of the sold air conditioners is less than half compared to the top expensive air-conditioning units [9].…”

Section: Introductionmentioning

confidence: 99%

Impact of Ambient Temperature and Humidity on the Performance of Vapour Compression Air Conditioning System - Experimental and Numerical Investigation

Andrew Makar,

Saad Mahmoud,

Raya Al-Dadah

et al. 2024

CFDL

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Due to global warming, population growth, and urbanisation, demands for space cooling in buildings have significantly increased. Mechanical vapour compression cooling technology is relatively mature, well-understood and most commonly used globally. However, they suffer from high energy consumption and adverse environmental impact due to the refrigerants used. As ambient temperature and humidity have significant effects on the performance of vapour compression systems, this paper experimentally and numerically investigates their impact on the performance of vapour compression air conditioning system in terms of power consumption and cooling capacity. It was concluded that at ambient humidity of 55%, as the ambient temperature increases from 22 °C to 40 °C, the compressor temperature has increased from 46 °C to 59 °C which increased its power consumption from 751.2 to 935.52 Watts, giving an increase of 10.24 Watts for every one degree of ambient temperature increase. Also, as ambient humidity in-creased from 32% to 88%, the power consumption increased from 739.2 Watts to 853.2 Watts, an increase of 114 Watts. A validated CFD (Computational Fluid Dynamics) model was developed and predicted a loss in the enthalpy change from 11.7kJ/kg.d.a to 3.6kJ/kg.d.a. due to ambient temperature increasing from 22 °C to 40 °C and a loss of enthalpy change from 12.857kJ/kg.d.a to 5.524kJ/kg.d.a. due to increasing the ambient air humidity from 32% to 88%. This work high-lighted the impacts of ambient conditions on the performance of vapour compression cooling system in terms of increased power consumption and loss of cooling capacity.

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“…PID control is widely used in industry [10][11][12] and researchers are exploring alternative controllers for energy systems with the aim of improving system stability, response, and energy utilization. Eldigair et al used OBC (Optimization-based controller) in vehicle thermal management, showing lower computational burden than the PI controller [13].…”

Section: Introductionmentioning

confidence: 99%

Study on Multivariable Dynamic Matrix Control for a Novel Solar Hybrid STIGT System

Zheng,

Luo,

et al. 2024

Energies

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To construct a clean and efficient energy system, advanced solar thermal power generation technology is developed, i.e., a solar hybrid STIGT (Steam Injected Gas Turbine) system with near zero water supply. Such a system is conducive to the efficient use of solar energy and water resources, and to improvement of the performance of the overall system. Given that the strong correlation between multiple-input and multiple-output of the new system, the MDMC (Multivariable Dynamic Matrix Control) method is proposed as an alternative to a PID (Proportional-Integral-Derivative) controller to meet requirements in achieving better control characteristics for a complex power system. First, based on MATLAB/Simulink, a dynamic model of the novel system is established. Then it is validated by both experimental and literature data, yielding an error no more than 5%. Subsequently, simulation results demonstrate that the overshoot of output power on MDMC is 1.2%, lower than the 3.4% observed with the PID controller. This improvement in stability, along with a reduction in settling time and peak time by over 50%, highlights the excellent potential of the MDMC in controlling overshoot and settling time in the novel system, while providing enhanced stability, rapidity, and accuracy in the regulation and control of distribution networks.

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Thermal analysis and development of PID control for electronic expansion device of vapor compression refrigeration systems

Cited by 12 publications

References 33 publications

Implementation of proportional–integral control in Baglog steamer temperature control

Implementation of proportional–integral control in Baglog steamer temperature control

Impact of Ambient Temperature and Humidity on the Performance of Vapour Compression Air Conditioning System - Experimental and Numerical Investigation

Study on Multivariable Dynamic Matrix Control for a Novel Solar Hybrid STIGT System

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