ECONOMICAL EVALUATION OF %100 FRESH AIR HVAC SYSTEM FOR HOSPITAL OPERATING ROOM: A CASE STUDY FOR 4 DIFFERENT CLIMATE ZONES

Year 2024, Volume: 9 Issue: 2, 61 - 78

Bengü Sena Yıldırım , Naime Filiz Özdil

Abstract

The yearly energy consumption of heating, ventilation and air conditioning (HVAC) system for an operating room (OR), placed in four different countries such as Adana in Turkey, Astana in Kazakhstan, Mosul in Iraq and Dushanbe in Tajikistan have been performed in this study. This study aimed to economically evaluate the use of a 100% fresh air HVAC system in countries with different climate types in identical operation room. Moreover, 10 year’s life span has been calculated using Life Cycle Cost (LCC) method for the considered countries. As a result, energy consumption of system is lower in regions with a cold climate type such as Astana in Kazakhstan with 6.58 kW and Dushanbe in Tajikistan with 7.15 kW while is higher in hot climates, such as Adana in Turkey with 12.87 kW and Mosul in Iraq with 9.256 kW. The annual and hourly cooling load for Mosul in Iraq are higher, but the total cooling load and total energy consumption are 40.6% less than these of Adana in Turkey because the fact that the wet-bulb temperature of Mosul in Iraq is lower than it of Adana in Turkey. The HVAC system's energy consumption is in direct proportion to the LCC value of the system. For this reason, Astana in Kazakhstan, which has a cold climate type, has the lowest LCC value with $116324.332. In conclusion, the %100 fresh air HVAC system can be used for analyzed countries but it is more economical in cold climates and countries with low wet -bulb temperatures.

Keywords

HVAC system, economic evaluation, energy consumption, Life Cycle Cost, Net Present Value

References

• [1] Anka, S. K., Mensah, K., Boahen, S., Ohm, T. I., Cho, Y., Choi, J. W., Choo, S.H., Kim, H.Y. and Choi, J.M. (2022), Performance optimization of an air source HVAC system for an internet data center building using the integrated COP method, Journal of Building Engineering, 61, 105308.
• [2] Taheri, S., Hosseini, P. and Razban, A. (2022), Model predictive control of heating, ventilation, and air conditioning (HVAC) systems: A state-of-the-art review, Journal of Building Engineering, 60, 105067.
• [3] Wang, Z., Calautit, J., Wei, S., Tien, P.W. and Xia, L. (2022), Real-time building heat gains prediction and optimization of HVAC setpoint: An integrated framework, Journal of Building Engineering, 49, 104103.
• [4] Ala’raj, M., Radi, M., Abbod, M.F., Majdalawieh, M. and Parodi, M., (2022), Data-driven based HVAC optimisation approaches: A Systematic Literature Review, Journal of Building Engineering, 46, 103678.
• [5] Ozyogurtcu, G., Mobedi, M. and Ozerdem, B., (2011), Economical assessment of different HVAC systems for an operating room: Case study for different Turkish climate regions, Energy and Buildings, 43, 1536–1543.
• [6] Ono, E., Mihara, K., Lam, K.P. and Chong, A., (2022), The effects of a mismatch between thermal comfort modeling and HVAC controls from an occupancy perspective, Building and Environment, 220, 109255.
• [7] Maddalena, E. T., Müller, S.A., dos Santos, R.M., Salzmann, C. and Jones C.N., (2022), Experimental data-driven model predictive control of a hospital HVAC system during regular use, Energy & Buildings, 271 ,112316.
• [8] Kang, Z., Zhang, Y., Dong, J., Cheng, X. and Feng, G., (2017), The Status of Research on Clean Air Conditioning System in Hospital Operation Room, Procedia Engineering, 205, 4129–4134.
• [9] Zhai, Z.J. and Osborne, A. L. (2013), Simulation-based feasibility study of improved air conditioning systems for hospital operating room, Frontiers of Architectural Research ,2, 468–475.
• [10] Ji, Y., Yong J.Y., and Liu, W., Zhang, X.J. and Jiang, L. (2022), Thermodynamic analysis on direct air capture for building air condition system: Balance between adsorbent and refrigerant, Energy and Built Environment, 5:40.
• [11] Hegazi, A. A., Abdelrehim, O. and Khater A., (2021), Parametric optimization of earth-air heat exchangers (EAHEs) for central air conditioning, International Journal of Refrigeration, 129, 278–289.
• [12] Farouk, N., Alotaibi, A. A., Alshahri A.H. and Almitani, K. H. (2022), Using PCM in buildings to reduce HVAC energy usage taking into account Saudi Arabia climate region, Journal of Building Engineering ,50, 104073.
• [13] Lu, Y., Dong, J., Lu, H., Niu, D., Zhang, S., Fang Z. and Lin, Z. (2022), Stratum-air-distributed radiant-convective room air conditioner for heating, Energy & Buildings, 271, 112311.
• [14] Yang, S. and Wan, M.P. (2022), Machine-learning-based model predictive control with instantaneous linearization – A case study on an air-conditioning and mechanical ventilation system, Applied Energy, 306, 118041.
• [15] Ahmadzadehtalatapeh, M. and Yau, Y.H., (2011), The application of heat pipe heat exchangers to improve the air quality and reduce the energy consumption of the air conditioning system in a hospital ward—A full year model simulation, Energy and Buildings, 43, 2344–2355.
• [16] Glicksman, L.R. and Taub, S. (1997), Thermal and behavioral modeling of occupant-controlled heating, ventilating and air conditioning systems, Energy and Buildings, 25, 243-249.
• [17] Delaˇc, B., Pavkovi´c, B., Leni´c, K. and Mađeri´c, D. (2022), Integrated optimization of the building envelope and the HVAC system in nZEB refurbishment, Applied Thermal Engineering, 211, 118442.
• [18] Papakostas, K.T. and Slini T., (2017), Effects of Climate Change on the Energy Required for the Treatment of Ventilation Fresh Air in HVAC Systems the Case of Athens and Thessaloniki, Procedia Environmental Sciences, 38, 852 – 859.
• [19] Luongo J. C., Fennelly K. P., Keen J. A., Zhai Z. J., Jones B. W. and Miller S. L., (2016), Role of mechanical ventilation in the airborne transmission of infectious agents in buildings, Indoor Air, 26: 666–678.
• [20] Zulkifli N.I., Shukri M.F., Tahir M.M., Muhajir A., Hanak, D.P., (2023), Performance analysis and optimisation of the chiller-air handling unit’s system with a wide range of ambient temperature, Cleaner Engineering and Technology, 14, 100643.
• [21] Deutsches Institut für Normung, DIN 1946/4 Heating, ventilation and air conditioning systems in Hospitals, 1999.
• [22] Cengel, Y.A., Boles, M.A., Thermodynamics: An Engineering Approach, third ed., McGraw-Hill, 1998.
• [23] American Society of Heating, Refrigerating and Air-Conditioning Engineers, Ventilation of Health Care Facilities, 2008 ASHRAE, 2008.
• [24] Anıl, O., Mobedi, M. and Ozerdem, B., HVAC design parameters of class I rooms in hospitals, 8, in: International Building Technology and Science Symposium, I˙stanbul, 2008, pp. 324–333.
• [25] Melhado, M.A., Hensen, J.L.M., Loomans, M. and Forejt, L., Review of OR ventilation standards, in: 17th International Air-conditioning and Ventilation Conference, Prague, 2006.
• [26] American Society of Heating, Refrigerating and Air-Conditioning Engineers, HVAC Design Manual for Hospitals and Clinics, 2003.