International Journal of Science and Research (IJSR) ISSN: 2319-7064 Impact Factor (2018): 7.426 Volume 8 Issue 2, February 2019 www.ijsr.net Licensed Under Creative Commons Attribution CC BY Hospital Air Handling Unit Selection with AHP Method in Turkey M. Benan Yazicioglu 1 , Oguz Borat 2 , Osman Yazicioglu 2 1 Graduate School of Science Engineering and Technology, Istanbul Commerce University, Istanbul, Turkey, 34840 Istanbul, Turkey 2, 3Industrial Engineering Department, Engineering Faculty, Istanbul Commerce University, Istanbul, Turkey, 34840 Istanbul, Turkey Abstract: The paper deals with choosing of AHU for hospitals with multi-criteria decision making method in Turkey. The hospitals require heating, cooling, or both, depending on climate zones, to keep ambient conditions within a reasonable range. In hospitals, heating, cooling or both according to climate zones are required to keep the ambient conditions in an appropriate range. The provision of hygienic environments in hospitals for human health has become very important. Hygienic AHU should be used for the air conditioning and ventilation of hygienic environments. The air handling unit used in hygienic systems must have additional features compared to comfort AHU. The weights of cost, flow rate, mass, power, and noise were determined. According to the criteria AHP method was applied to obtain the most appropriate AHU for hospital. Keywords: hospital AHU, clean rooms, decision making, AHP method 1. Introduction The market of the air handling unit application depends on area, type, and capacity. The AHU system market was valued at US $ 181.0 billion in 2018 and is expected to reach US $ 251.6 billion by 2023, at a compound annual growth rate of 6.80% between 2018 and 2023 [1]. World demand for air conditioning increased by 8.1% in 2017 compared to the previous year and reached 110.56 million units. Demand in Turkey 790 thousand units in 2016 and demand in 2017 was 839 thousand units [2]. Air handling unit (AHU) referred to as climate control is a process of treating air to control its temperature, humidity, cleanliness, and distribution to meet the requirements of the conditioned space. If the primary function of the system is to satisfy the comfort requirements of the occupants of the conditioned space, the process is referred to as comfort air conditioning. AHU systems are also important to occupants' health, because a good regulated and maintained system will keep spaces free from mold and other harmful organisms. The term ventilation is applied to processes that supply air to or remove air from a space by natural or mechanical means. The energy consumption of air conditioning systems is the most intense in terms of all technical building services, commercial buildings such as hospitals, office buildings and other similar buildings. Implementing a Time Control Program (TCP) using multi-state operation by resetting channel pressure values provides significant savings in energy consumption [3]. In hospitals, heating, cooling or both according to climate zones are required to keep the ambient conditions in an appropriate range. Selection of appropriate AHU to be used in hospitals is important in terms of power, air flow and other factors. The AHU industry had been regulated by the manufacturers but regulating organizations such as ACHRI (Air Conditioning, Heating and Refrigeration Institute), AMCA (Air Movement and Control Association), ASHRAE (American Society of Heating, Refrigerating and Air- Conditioning Engineers), UMC (Uniform Mechanical Code), and IBC (International Building Code) have been established to support the industry. The prime requirement in respect of the climate in a hospital is that room temperature should be at a comfortable level. In addition, the air must be acceptably clean, lighting and acoustic conditions must be good enough. Thermal comfort can be defined as a subjective response, or state of mind, when a person expresses satisfaction with the surrounding environment. The environment must provide light, air, and thermal comfort. The factors of metabolic rate, evaporation, conduction, convection, and radiation affect the physical comfort. Proper acoustics and hygiene are also important for physical comfort. While it may be partially influenced by a variety of contextual and cultural factors, a person’s sense of thermal comfort is primarily a result of the body’s heat exchange with the environment. This is influenced by thermal parameters; air temperature, radiant temperature, humidity and air speed and personal parameters; clothing and metabolic rate [4]. The provision of hygienic environments in hospitals for human health has become very important. Hospital infections cost $ 132 million in Norway and $ 1.7 billion in the UK. Deaths due to hospital infections have a significant impact on the US budget. $ 1.6 billion of these expenditures consist of infections occurring in the operation area. As a result of these infections, an estimated 19 thousand people die annually in the United States. According to data from the Paper ID: ART20195039 10.21275/ART20195039 530