Dynamic simulation of hydrogen-based off-grid zero energy buildings with hydrogen storage considering Fanger model thermal comfort

Sun, Kai; Chen, Xijie; Dastjerdi, Sajad Maleki; Yang, Qing

doi:10.1016/j.ijhydene.2022.03.248

Cited by 11 publications

(3 citation statements)

References 43 publications

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“…The average air velocities for all four zones were kept at 0.15 m/s, due to the low metabolic rates. The pin positions of both the ACBs in this case were kept at position 5 in order to keep high momentum created by the collision of air jets at Figures [7][8][9][10][11] show that different velocity zones can be established by moving the colliding jets from the center towards or away from the occupancy zones. This movement of jets was used to create high-and low-velocity zones according to the metabolic rates set for the human dummy.…”

Section: Air Velocity Distributionmentioning

confidence: 99%

“…Thermal comfort is defined as the condition of mind that provides satisfaction with the thermal environment [7,8]. Fanger's theory about thermal comfort showed that thermal comfort is dependent on metabolic rate, clothing insulation, and environmental conditions [9,10]. Hence, for a large-scale office setup, managing individual thermal comfort for the occupants of different ages, office setup, managing individual thermal comfort for the occupants of different ages, gender, and health seems challenging with conventional HVAC systems such as mixing ventilation [11,12].…”

Section: Introductionmentioning

confidence: 99%

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Precision Ventilation for an Open-Plan Office: A Study of Variable Jet Interaction between Two Active Chilled Beams

et al. 2022

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Precision ventilation is developed to achieve thermal comfort for occupants in an office by creating micro-climate zones. The present study aims to achieve individual thermal comfort for occupants with different metabolic rates by using higher airspeeds for enhancing heat transfer. The variable jet interaction between two ACBs with JetCone adjustments cause higher velocity jets to reach different regions of the occupied zone. The colliding jets from the center of a thermal isolated room were moved towards different zones in an office configuration with a constant room temperature of 23 °C. This study was conducted for five different cases in a room divided into four zones according to occupants’ metabolic rates. The experimental and CFD results show that occupants facing symmetrical airflow distribution and with a constant 1.2 metabolic rate (Case 1) had a similar predicted mean vote (PMV) index. The zones with higher-metabolic-rate occupants, i.e., 1.4 met and 1.6 met in cases 2 and 3 were exposed to air velocities up to 0.4 and 0.5 m/s, respectively. In case 4, the air velocity in the single zone with 1.6 met occupants was raised to 0.6 m/s by targeted airflow distribution achieved by adjusting JetCones. These occupants with higher metabolic rates were kept thermally neutral, in the −0.5 to +0.5 PMV range, by pushing the high velocity colliding jets from the center towards them. In case 5, the results showed that precision ventilation can maintain the individual thermal comfort of up to three different zones (in the same office space) by exposing the occupants with metabolic rates of 1.2, 1.4, and 1.6 met to airspeeds of 0.15, 0.45, and 0.55 m/s, respectively.

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Section: Air Velocity Distributionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Precision Ventilation for an Open-Plan Office: A Study of Variable Jet Interaction between Two Active Chilled Beams

et al. 2022

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“…The respective challenges and perspectives on the topic are discussed. Sun et al 4 dynamically simulated off‐grid zero energy buildings integrated with hydrogen storage considering the Fanger model thermal comfort. Gandiglio et al 5 performed a comprehensive LCA study for a renewable‐powered energy system integrated with the combination of hydrogen and battery energy storage for a remote off‐grid community.…”

Section: Introductionmentioning

confidence: 99%

Development and comparative evaluation of integrated solar‐driven off‐grid energy systems with hydrogen production and storage options for sustainable buildings

Erdemir

Dinçer

2023

Energy Storage

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This study presents the development of a new solar energy‐based integrated system where hydrogen production, storage, and power generation and heat storage subsystems are designed in a combined manner to meet the energy demands of multiple buildings in a community. It is also comprehensively analyzed and assessed under various criteria comparatively. A comprehensive study is established for a community with 80 156 residential buildings in Southern Ontario, Canada. Solar‐driven three different cases are investigated, which cover (i) solar energy and grid‐assisted, (ii) solar energy‐driven system integrated with hydrogen subsystems, and (iii) solar‐driven system integrated with hydrogen subsystems and heat storage for both heating and cooling purposes. The studied cases are assessed over the energy and exergy efficiencies. The results of this study indicate that it is possible to achieve solar‐driven and off‐grid operating conditions with hydrogen and heat storage systems. Only about 15% of the energy demand can be met by solar energy without any energy storage options (Case 1). Case 2 shows that it can be achieved off‐grid solar energy system with 1100 MWp of solar power plant capacity with the integration of hydrogen as an energy storage option. In the case of using hydrogen and heat storage together, off‐grid operating conditions can be reached with 750 MWp of power plant capacity. The heat storage integration helps reduce the capacity of the photovoltaic power plant by 32%. Furthermore, hydrogen and heat storage options are needed to cover both cooling and heating demands simultaneously to provide sustainable buildings.

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Co-ordinations of ocean energy supported energy sharing between zero-emission cross-harbour buildings in the Greater Bay Area

Zhou,

Cao

2024

Applied Energy

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Dynamic simulation of hydrogen-based off-grid zero energy buildings with hydrogen storage considering Fanger model thermal comfort

Cited by 11 publications

References 43 publications

Precision Ventilation for an Open-Plan Office: A Study of Variable Jet Interaction between Two Active Chilled Beams

Precision Ventilation for an Open-Plan Office: A Study of Variable Jet Interaction between Two Active Chilled Beams

Development and comparative evaluation of integrated solar‐driven off‐grid energy systems with hydrogen production and storage options for sustainable buildings

Co-ordinations of ocean energy supported energy sharing between zero-emission cross-harbour buildings in the Greater Bay Area

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