Air Conditioning Energy Efficiency and Thermal Comfort in Hotel Buildings in Hot and Humid Tropical Climates
The Case Study of Makassar City Coastal Area Hotel, South Sulawesi, Indonesia
Received: 22 July 2024 | Revised: 2 September 2024 | Accepted: 8 September 2024 | Online: 2 December 2024
Corresponding author: Nasrullah Nasrullah
Abstract
The objective of this research is to examine energy consumption efficiency strategies with respect to the type of dwelling unit, cooling load, and thermal comfort. This can be evaluated through the study of the hotel building air system, with the aim of ensuring the thermal comfort of its occupants. This research employs a quantitative methodology, using observation, measurement, and experimental techniques. The case study is situated within the context of hotels in Makassar City, South Sulawesi Province, Indonesia. The subject of this study is the Swissbel Hotel building, located in the coastal area of Makassar City. The data are analyzed in order to determine the Energy Consumption Intensity (IKE), Room Energy Intensity (REI), and occupancy rate based on the heat load inside and outside the building. The data are then processed using a parametric statistical approach. Subsequently, the building envelope is analyzed through the calculation of the Overall Thermal Transfer Value (OTTV) in accordance with the standards set out in SNI 6390: 2011. The cooling load and a thermal comfort assessment, in line with the Predicted Mean Vote (PMV) index, Predicted Percentage of Dissatisfaction (PPD) index, and effective temperature according to the ASHRAE 55-2022 standard, are then calculated, and a simulation is performed to determine the most efficient strategy for the use of air conditioning energy. The findings indicated that alterations in the dimensions of the facade (sun shading) resulted in a 16% reduction in the cooling load, with the incorporation of horizontal and vertical shading sizes of 4 m × 2.5 m, square glass openings, and 8 mm heat-absorbing glass. This led to a PMV value of 0.40, a PPD of 8%, and an effective temperature value of 26.8°C. The modification resulted in a percentage gain of 20.08%, at 10-60% occupancy load with a cooling load reduction rate of 1,912,071 kW and a thermal comfort index within the comfortable range.
Keywords:
energy efficiency, air conditioning, thermal comfort, residential building, humid hot tropics, Makassar cityDownloads
References
N. V. Ayuningtyas, J. A. Suryabrata, A. Sarwadi, "Effect of Window To Wall Ratio (WWR) for Thermal Comfort in Energy Efficient Office Buildings Based on Jakarta Climate Data," in SAKAPARI 2019, pp. 158-168, 2019.
R. Vale and B. Vale, Green Architecture: Design for a Sustainable Future. London, UK: Thames & Hudson, 1991.
E. Elsarrag and Y. Alhorr, "Using Dynamic Facade for Indoor Air Quality, Thermal Comfort and Energy Efficient Air Conditioning," University of Khartoum Engineering Journal, vol. 1, no. 2, pp. 63–66, Oct. 2011.
N. H. Phuong, L. D. L. Nguyen, V. H. M. Nguyen, V. V. Cuong, T. M. Tuan, and P. A. Tuan, "A New Approach in Daylighting Design for Buildings," Engineering, Technology & Applied Science Research, vol. 13, no. 4, pp. 11344–11354, Aug. 2023.
R. Losung and I. Makainas, "Energy Conservation in Architecture," Journal of Media Matrasain (JMM), vol. 8, no. 3, pp. 108–120, Nov. 2011.
R. Rahim, B. Hamzah, R. Mulyadi, and Nasrullah, "Energy conservation of the air-conditioning system of hotel building in Makassar City," International Journal of Civil Engineering and Technology (IJCIET), vol. 10, no. 10, pp. 115–123, Oct. 2019.
A. Marjianto and D. Mangindaan, "Air Conditioning System Design from Energy and Cost Aspects in Hotel Building in Semarang," Engineering, MAthematics and Computer Science Journal (EMACS), vol. 2, no. 3, pp. 97–106, Sep. 2020.
Y. Sheng, Z. Miao, J. Zhang, X. Lin, and H. Ma, "Energy consumption model and energy benchmarks of five-star hotels in China," Energy and Buildings, vol. 165, pp. 286–292, Apr. 2018.
P. Satwiko, Definition of comfort in a building. Yogyakarta, Indonesia, 2009
N. L. Latifah, H. Perdana, A. Prasetya, and O. P. M. Siahaan, "Thermal Comfort Study on Student Centre Building Itenas Bandung," Reka Karsa: Jurnal Arsitektur, vol. 1, no. 1, 2013.
M. A. Hamdy, B. Hamzah, R. Wikantari, and R. Mulyadi, "Analysis of Thermal Environmental in Buildings with Water and Landscape Elements as Microclimate Modifiers in Hot and Humid Tropical Climates," IOP Conference Series: Earth and Environmental Science, vol. 1157, no. 1, Apr. 2023, Art. no. 012008.
I. Rajapaksha, H. Nagai, and M. Okumiya, "Indoor Thermal Modification of a Ventilated Courtyard House in the Tropics," Journal of Asian Architecture and Building Engineering, vol. 1, no. 1, pp. 87–94, Mar. 2002.
N. Jamaludin, M. F. Khamidi, S. N. A. Wahab, and M. M. A. Klufallah, "Indoor Thermal Environment in Tropical Climate Residential Building," E3S Web of Conferences, vol. 3, 2014, Art. no. 01026.
F. A. AlFaraidy and S. Azzam, "Residential Buildings Thermal Performance to Comply With the Energy Conservation Code of Saudi Arabia," Engineering, Technology & Applied Science Research, vol. 9, no. 2, pp. 3949–3954, Apr. 2019.
Sangkertadi, Thermal Comfort in a Humid Tropical Climate Outdoor Space. Bandung, Indonesia: Alfabeta, 2013.
R. Sucheran, "Energy Conservation Measures in the Hotel Sector in Kwa-Zulu Natal South Africa," African Journal of Hospitality, Tourism and Leisure, vol. 4, no. 2, 2015.
Nasrullah, R. Rahim, B. Hamzah, and R. Mulyadi, "Energy Conservation of Hotel Building Air Conditioning System Based on Makassar City Microclimate Condition," Plano Madani, Journal of Urban and Regional Planning, vol. 8, no. 1, pp. 100–113, Apr. 2019.
D. F. Satriopratomo, Y. P. Devia, and L. Susanti, "Energy use Efficiency on High Rise Hotel Building to Reduce Carbon Emission Using Sefaira," Astonjadro, vol. 13, no. 1, pp. 212–224, Jan. 2024.
M. Tang, "Evaluating green hotels in Taiwan from the consumer’s perspective," International Journal of Management Research and Business Strategy, vol. 4, no. 1, pp. 1–15, 2015.
J. C. Wang, "A study on the energy performance of hotel buildings in Taiwan," Energy and Buildings, vol. 49, pp. 268–275, Jun. 2012.
A. Tanod, H. Tumaliang, and L. Patras, "Electrical Energy Conservation at Santika Hotel Palu," Journal Teknik Elektro dan Komputer, vol. 4, no. 4, pp. 46–56, 2015.
L. M. Dibene-Arriola, F. M. Carrillo-González, S. Quijas, and M. C. Rodríguez-Uribe, "Energy Efficiency Indicators for Hotel Buildings," Sustainability, vol. 13, no. 4, Jan. 2021, Art. no. 1754.
H. Nauwir, K. Kusmanurwira, and M. A. Firdaus, "Evaluation of Electric Energy Utilisation System at Grand Clarion Hotel Makassar," Jurnal Teknik Mesin Sinergi, vol. 16, no. 2, pp. 181–189, 2018.
Y. Lavafpour, "Towards new approaches for integrating principles of precedent architecture into energy efficient buildings in hot-dry climate," Serbian Architectural Journal, vol. 4, no. 3, pp. 240–253, Jan. 2012.
"Program Quarter 4 Progress Report," United States Agency for International Development, Jakarta, Indonesia, 2017.
D. Ariestadi, I. Alfianto, and M. Sulton, "Energy Performance Criteria for Thermal Comfort in Higher Education Facility Buildings in Indonesia, Analysed by Important Performance Analysis Method," Review of Urbanism and Architectural Studies, vol. 12, no. 1, pp. 31–41, Jul. 2014.
H. Abdurrachman, M. Sibarani, and J. V. Tuapetel, "Design of Central Air Conditioning (AC) in Building G of the Indonesian Institute of Technology," Journal of Mechanical Engineering-ITI, vol. 2, no. 2, pp. 35–41, 2018.
S. Lehmann, "Energy-Efficient Building Design: Towards Climate- Responsive Architecture," Encyclopedia of Life Support Systems. EOLSS, Paris, France, 2011.
T. Hendarto, M. Rachman, O. Sulastio, and D. Afrinaldi, "Study of Space Proportion in the New Building of Concordia Hotel Bandung," Reka Karsa, Journal of National Institute of Technology, Department of Architecture, vol. 1, no. 1, Jul. 2012.
R. Gendo, J. Priatman, and S. Loekito, "Energy Conservation Analysis of Building Envelope Based on SNI 03-6389-2011, Case Study: Building P1 and P2 of Petra Christian University Surabaya," Dimensi Utama Teknik Sipil, vol. 2, no. 1, pp. 1–7, Apr. 2015.
C. Mediastika, Energy Efficient and Environmentally Sustainable Through Buildings. Yogyakarta, Indonesia: Andi Publishing, 2013.
N. H. Wong and S. S. Khoo, "Thermal comfort in classrooms in the tropics," Energy and Buildings, vol. 35, no. 4, pp. 337–351, May 2003.
SNI 6390:2011, Energy Conservation of Building Envelope in Building. Jakarta, Indonesia: National Standardization Agency, 2011.
ANSI/ASHRAE Standard 55, Thermal Environmental Conditions for Human Occupancy. Atlanta, USA: ASHRAE, 2020.
N. Nasrullah, M. Hamdy, M. Mustamin, and A. Faharuddin, "Energy Management Model for Air Conditioning Energy Conservation in Hotel Buildings of Makassar City, Indonesia," Civil Engineering and Architecture, vol. 12, no. 4, pp. 2755–2771, Jul. 2024.
R. Govindarajan, S. Meikandasivam, and D. Vijayakumar, "Performance Analysis of Smart Energy Monitoring Systems in Real-time," Engineering, Technology & Applied Science Research, vol. 10, no. 3, pp. 5808–5813, Jun. 2020.
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Copyright (c) 2024 Nasrullah Nasrullah, Muhammad Awaluddin Hamdy, Muhammad Tayeb Mustamin
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