GIS Retrofitting Technique for Hong Kong Sports Center with a Large Hall
Highlights
- These findings highlight the effectiveness of the GIS technique based on practical engineering judgment and simulation results in improving ventilation performance, reducing energy consumption, and optimizing thermal comfort in large-scale buildings in occupied zones.
- Using the GIS retrofitting technique, sports canter allows for a significant increase of 1.5 ℃ in the supply temperature, leading to substantial energy savings while maintaining acceptable thermal comfort, a better Local Air Change Index (LCAI), Local Mean Age (LMA), and Air Diffusion Performance Index (ADPI) in comparison with the existing air distribution system.
- The GIS technique is highly suitable for large volumes of space in Hong Kong and has become an effective way to achieve carbon neutrality.
Abstract
:1. Introduction
2. Methodology
2.1. Numerical Model
2.1.1. Boundary Conditions and Initial Conditions for CFD Simulations
2.1.2. Zoning of the Simulation
2.1.3. Grid Independence Analysis
2.1.4. Evaluation Parameters
2.2. Geometrical Model
2.2.1. Baseline Model
2.2.2. Retrofit Model
3. Results and Discussion
3.1. Comparison of Baseline and Retrofit Modeling Results
3.2. GIS Algorithms of Sequence Control
- Air distribution strategy and control parameter sets are scientific issues related to thermal comfort that administrative measures find challenging to address. Conventional methods of ceiling-supply and ceiling-return air distribution methods are not suitable for providing thermal neutrality at elevated temperatures, particularly in high-ceiling air-conditioned spaces and
- Even if the GIS technology is ready for adoption, integrating it with architectural design poses challenges in incorporating various types and locations of supply and return terminals, especially in occupied regions, while adhering to optimized air distribution strategies and specific control algorithms. This integration is a case-by-case process and cannot standardize the aesthetic design practices of passive architecture, which is a fundamental prerequisite for GIS.
3.3. Integration with Other MEP Systems
3.4. Guideline of GIS Application
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
Appendix A
Constants | Cμ | Cε1 | Cε2 | δk | δε |
---|---|---|---|---|---|
Values | 0.09 | 1.44 | 1.92 | 1.3 | 1.0 |
Appendix B
Appendix C
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Supply Outlet | Exhaust Outlet | Supply Flow Rate | Exterior Environment Temperature | |
---|---|---|---|---|
Baseline Mode | 16 °C | Pressure-outlet | 14.7 m3/s | 35 °C |
Retrofit Model | 17.5 °C | Pressure-outlet | 14.7 m3/s | 35 °C |
U-Value of Exterior Wall | U-Value of Roof | U-Value of Floor | U-Value of Window | |
---|---|---|---|---|
Baseline Mode | 1.13 W/m2K | 0.38 W/m2K | Isothermal | 1.4 W/m2K |
Retrofit Model | 1.13 W/m2K | 0.38 W/m2K | Isothermal | 1.4 W/m2K |
Zones | Height (m) | Average Operative Temperature, AOT (°C) | Average Air Speed, AAS (m/s) | Local Mean Age, LMA (s) | Local Air Change Index, LACI | ||||
---|---|---|---|---|---|---|---|---|---|
Baseline | Retrofit | Baseline | Retrofit | Baseline | Retrofit | Baseline | Retrofit | ||
Occupied Zone 1 | 0.0–1.8 | 24.65 | 25.45 | 0.28 | 0.14 | 494.59 | 115.03 | 0.86 | 7.08 |
Occupied Zone 2 | 0.0–1.8 | 23.97 | 25.52 | 0.33 | 0.14 | 429.42 | 113.00 | 0.99 | 7.69 |
Occupied Zone 3 | 0.0–1.8 | 24.54 | 25.46 | 0.23 | 0.14 | 338.37 | 122.24 | 1.28 | 7.05 |
Above Occupied Zone | 1.8–6.0 | 25.48 | 27.20 | 0.17 | 0.07 | 457.33 | 287.38 | 0.99 | 2.11 |
Below Ceiling | 6.0–9.3 | 25.34 | 27.84 | 0.23 | 0.07 | 422.04 | 412.94 | 1.19 | 1.10 |
Zones | Height (m) | Air Distribution Performance Index, ADPI (%) | Predicted Mean Vote, PMV | Predicted Percentage of Dissatisfied, PPD (%) | |||
---|---|---|---|---|---|---|---|
Baseline | Retrofit | Baseline | Retrofit | Baseline | Retrofit | ||
Occupied Zone 1 | 0.0–1.8 | 72.35 | 96.65 | 0.16 | 0.43 | 6.9 | 9.6 |
Occupied Zone 2 | 0.0–1.8 | 55.09 | 97.37 | −0.09 | 0.44 | 6.1 | 9.6 |
Occupied Zone 3 | 0.0–1.8 | 85.62 | 97.00 | 0.16 | 0.42 | 7.4 | 9.6 |
Above Occupied Zone | 1.8–6.0 | 89.72 | 86.58 | 0.40 | 0.60 | 9.6 | 12.9 |
Below Ceiling | 6.0–9.3 | 56.21 | 77.14 | 0.35 | 0.81 | 11.5 | 19.7 |
Steps (1) to (5) | Items to be Developed |
---|---|
(1): Judging the control measures GIS |
|
(2): Calculating cooling load |
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(3): Calculating effective cooling load and ventilation performance at breathing height of the occupied zone |
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(4): Cost-effectiveness study by integrated with Mechanical and Electrical Piping (MEP) and its control system |
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(5): Evaluation process |
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Fong, M.-L.A.; Tsang, K.-K.D. GIS Retrofitting Technique for Hong Kong Sports Center with a Large Hall. Architecture 2023, 3, 410-427. https://doi.org/10.3390/architecture3030022
Fong M-LA, Tsang K-KD. GIS Retrofitting Technique for Hong Kong Sports Center with a Large Hall. Architecture. 2023; 3(3):410-427. https://doi.org/10.3390/architecture3030022
Chicago/Turabian StyleFong, Ming-Lun Alan, and Kai-Kwong Dennis Tsang. 2023. "GIS Retrofitting Technique for Hong Kong Sports Center with a Large Hall" Architecture 3, no. 3: 410-427. https://doi.org/10.3390/architecture3030022