Simulation and validation of indoor temperatures and relative humidity in multi-zone buildings under occupancy conditions using multi-objective calibration

Martínez-Mariño, Sandra; Eguía, P.; Granada, Enrique; Erkoreka, Aitor

doi:10.1016/j.buildenv.2021.107973

Cited by 32 publications

(11 citation statements)

References 38 publications

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“…The maximum dependences of the relative humidity of the gas flow and the density of the wet gas flow on the temperature of the aggressive gas flow were determined theoretically. A mathematical expression was calculated for the calculation of the relative humidity of the aggressive gas flow, depending on the aggressive gas flow temperature [17,18].…”

Section: Theoretical Research 231 Methodology Of Theoretical Evaluati...mentioning

confidence: 99%

Experimental Research of Gaseous Emissions Impact on the Performance of New-Design Cylindrical Multi-Channel Cyclone with Adjustable Half-Rings

et al. 2022

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Cyclones are widely used for separating particles from gas in energy production objects. The efficiency of conventional centrifugal air cleaning devices ranges from 85 to 90%, but the weakness of many cyclones is the low collection efficiency of particles less than 10 μm in diameter. The novelty of this work is the research of the channel-type treatment device, with few levels adapted for precipitation of fine particulate matter, acting by a centrifugal and filtration principle. Many factors have an impact on cyclone efficiency—humidity, temperature, gas (air) composition, airflow velocity and etc. Many scientists evaluated only the effect of origin and size of PM on cyclone efficiency. The effect of gas (air) composition and temperature, and humidity on the multi-channel cyclone-separator efficiency still demands contributions. Complex theoretical and experimental research on air flow parameters and the efficiency of a cylindrical eight-channel system with adjustable half-rings for removing fine-dispersive particles (<20 μm) was carried out. The impact of air humidity and temperature on air flow, and gaseous smoke components on the removal of wood ashes was analyzed. The dusty gas flow was regulated. During the experiment, the average velocity of the cyclone was 16 m/s, and the temperature was 20–50 °C. The current paper presents experimental research results of wood ash removal in an eight-channel cyclone and theoretical methodology for the calculation of airflow parameters and cyclone effectiveness.

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Section: Theoretical Research 231 Methodology Of Theoretical Evaluati...mentioning

confidence: 99%

Experimental Research of Gaseous Emissions Impact on the Performance of New-Design Cylindrical Multi-Channel Cyclone with Adjustable Half-Rings

et al. 2022

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“…Moisture transfer in porous building materials affects the energy consumption of buildings (Martínez-Mariño et al, 2021; Wan et al, 2021; Woloszyn et al, 2009), durability of the materials (Nakajima et al, 2020; Parracha et al, 2021; Sakiyama et al, 2021), and comfort and health of the occupants (Martínez-Mariño et al, 2021; Woloszyn et al, 2009). Thus, hygrothermal models have been developed and are widely used to predict heat and moisture transfer in building components (Asphaug et al, 2021; Delgado et al, 2010; Sakiyama et al, 2021; Shi et al, 2018; Woloszyn et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Study on efficient and accurate protocols of measuring sorption isotherm of porous building materials using three-dimensional hygrothermal simulation

Fukui

Takada

2023

Journal of Building Physics

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The sorption property of porous building materials in the hygroscopic region (sorption isotherm) is an important input to hygrothermal simulation. In this study, we proposed efficient and accurate protocols to obtain sorption isotherms using the static desiccator method. We developed a calculation model for three-dimensional simultaneous heat and moisture transfer in a material corresponding to the measurement specified in ISO 12571. Using an international database of the material properties, we conducted numerical simulations of the sorption process for five types of materials. The evolution of the amount of adsorbed moisture in a specimen and the time to reach equilibrium during the measurement were calculated under various humidity levels and specimen dimensions. According to the simulated results, we improved timing and interval for weighting the specimen to confirm the attainment of equilibrium for each type of a material and for each humidity level from the viewpoint of efficiency and accuracy. Meanwhile, the influence of size of a specimen on the time necessary to obtain the results was quantitatively demonstrated. Moreover, it was demonstrated that the method used for the determination of the attainment of equilibrium provided in ISO 12571 can underestimate the moisture content of materials with low moisture content and vapor permeability, and a policy to reduce risks of the underestimation was proposed.

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“…Another paper reported the accuracy of an EnergyPlus model for a five-story office building and found that the calibrated model predicted hourly indoor temperatures for an entire year with a cvRMSE value of less than 2% and a temperature deviation of ±1.5 °C [13]. A multizone airflow model using TRNSYS for two test houses was developed in [17]. This model achieved an average cvRMSE value for the indoor temperatures of about 2.2%.…”

Section: Introductionmentioning

confidence: 99%

Development of a Building Simulation Model for Indoor Temperature Prediction and HVAC System Anomaly Detection

PALAİĆ,

ŠTAJDUHAR,

LJUBİC

et al. 2023

Journal of Energy Systems

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In order to reduce global energy consumption, energy-efficient, green and smart buildings have to be built. In addition to the application of other energy efficiency measures, an effective management of HVAC systems is required. High quality management and control of these systems ensures optimal occupant comfort levels, proper operation, rational energy consumption, and a positive impact on the environment. This is especially important for large buildings with complex systems such as hotels. As a contribution to the creation of appropriate tools for the management and control of HVAC systems in smart buildings, this paper presents the results of the current development of a detailed dynamic simulation model based on data collected from a smart room system in a hotel in Zagreb, Croatia. The smart room system, which is integrated into the hotel's building management system, provides historical data on set and current room temperatures, room occupancy schedule, window opening, fan coil operation status, fan rotation speed, valve opening, and operating mode with a time step of 5 minutes. The simulation model based on the TRNSYS software uses a part of the available data and calculates the current internal room temperatures. A comparison of the predicted and measured temperatures at each time step showed that the deviations are within the acceptable limits. The final objectives of the model development are the identification of anomalies in the operation of the HVAC system and the optimization of its operation with the aim of reducing energy consumption.

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Simulation and validation of indoor temperatures and relative humidity in multi-zone buildings under occupancy conditions using multi-objective calibration

Cited by 32 publications

References 38 publications

Experimental Research of Gaseous Emissions Impact on the Performance of New-Design Cylindrical Multi-Channel Cyclone with Adjustable Half-Rings

Experimental Research of Gaseous Emissions Impact on the Performance of New-Design Cylindrical Multi-Channel Cyclone with Adjustable Half-Rings

Study on efficient and accurate protocols of measuring sorption isotherm of porous building materials using three-dimensional hygrothermal simulation

Development of a Building Simulation Model for Indoor Temperature Prediction and HVAC System Anomaly Detection

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