Comparative analysis of cooling energy performance between water-cooled VRF and conventional AHU systems in a commercial building

Seo, Byeongmo; Yoon, Yeo Beom; Yu, Byeong Ho; Cho, Soolyeon

doi:10.1016/j.applthermaleng.2020.114992

Cited by 22 publications

(2 citation statements)

References 18 publications

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“…EnergyPlus output the necessary status parameters to Python and obtained the control signals from Python in the co-simulation platform [21]. Besides, multiple researches have developed co-simulations between EnergyPlus and MATLAB in the BCVTB platform to analyze the performance of HVAC (heating, ventilation, and air conditioning) units [22], energy consumptions in buildings, and the variations on the zone environment [23]. Among these studies, the energy simulation is normally the one-dimensional models with control strategies and interactions among different components to be fully considered.…”

Section: Introductionmentioning

confidence: 99%

Prediction and Evaluation of Dynamic Variations of the Thermal Environment in an Air-Conditioned Room Using Collaborative Simulation Method

et al. 2021

Energies

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In this study, a collaborative simulation method is proposed to predict dynamic variations of the thermal environment in an air-conditioned room. The room thermal environment was predicted and analyzed by varying the structural and control parameters of the air conditioner considering the dynamic coupling effect. Connections and regularities were established between the applicable parameters and evaluation indices of the thermal environment. The simulation results demonstrated the interactions among the system structural parameters, control parameters, and the thermal environment. Within a certain parameter range, the evaporator structure exhibited a significant effect on temperature uniformity and vertical air temperature difference, followed by predicted mean vote (PMV) and draught rate (DR). The associated evaluation indices were sensitive to fin spacing, tube spacing, and tube outer diameter, in the same order, which were structural parameters of the evaporator. The effect of the air supply angle on the vertical air temperature difference was evident; however, its influence on the PMV, DR, and temperature uniformity did not indicate consistent variations.

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Section: Introductionmentioning

confidence: 99%

Prediction and Evaluation of Dynamic Variations of the Thermal Environment in an Air-Conditioned Room Using Collaborative Simulation Method

et al. 2021

Energies

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“…Examples of building energy management analyzes using increased thermal capacitance and thermal storage management are shown in work [27]. Tools for increasing energy efficiency in the examples [28] and in the integration of HVAC systems are presented in the works [29,30].…”

Section: Introductionmentioning

confidence: 99%

Introduction to the Dynamics of Heat Transfer in Buildings

Babiarz

Szymanski²

2020

Energies

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Changing climatic conditions cause the variability of the parameters of the building’s surroundings, which in turn causes both the gains and losses of heat to change over time. There is variability in both daily and annual cycles. Meeting the requirements of thermal comfort in rooms requires maintaining the required parameters, including constant temperature. Heat gains and losses must be balanced, and this balance is ensured through appropriate heating systems. At the same time, the above means that the demand for heating buildings is not constant but depends on external weather conditions and the energy efficiency of the building. This, in turn, affects the thermal inertia, causing changes in the partition temperature to occur slower than the changes in air temperature. Therefore, the amplitude of the heating power changes is not proportional to the amplitude of the outside air temperature change. The paper presents an example of the analysis of thermal dynamics in buildings. Various aspects of heat transfer in the building were investigated taking into account the transient conditions. The variability of temperature over time at different depths of the partition was analysed, showing the results graphically. The periodic variability of the outside air temperature and the intensity of solar radiation were described by the Fourier series. Moreover, the article shows the influence of the thermal insulation thickness of the external wall on the annual amplitude of temperature changes and on the duration of the heating season, which is important from the point of view of optimization.

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Energy Efficient Variable Refrigerant Flow Systems for Modern Buildings

Parameshwaran¹,

Karunakaran²

2023

Variable Refrigerant Flow Systems

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Comparative analysis of cooling energy performance between water-cooled VRF and conventional AHU systems in a commercial building

Cited by 22 publications

References 18 publications

Prediction and Evaluation of Dynamic Variations of the Thermal Environment in an Air-Conditioned Room Using Collaborative Simulation Method

Prediction and Evaluation of Dynamic Variations of the Thermal Environment in an Air-Conditioned Room Using Collaborative Simulation Method

Introduction to the Dynamics of Heat Transfer in Buildings

Energy Efficient Variable Refrigerant Flow Systems for Modern Buildings

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