Effect of Air Conditioning Position on Thermal Comfort in the Floor Air Conditioning System

Sabtalistia, Y.A.; Ekasiwi, Sri Nastiti N.; Iskandriawan, Bambang

doi:10.4028/www.scientific.net/amm.493.74

Cited by 7 publications

(9 citation statements)

References 7 publications

(8 reference statements)

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“…A good air conditioning system is needed to save energy in addition to getting a comfortable room with good air distribution and a comfortable air temperature and appropriate flow rate in a room. This is what has led many researchers to investigate the performance of HVAC [1,[9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Air Distribution in Mosque Rooms with Different Angles of Supply and Inlet Velocity

Harsito¹,

Permata²

2021

IJHT

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The HVAC (heating, ventilation, and air conditioning) systems utilization has increased in the last decade. It conducts global warming which has an impact on the rising of global temperatures. An excellent air conditioning system will make the room comfortable conditions. This paper aims to investigate the mosque space with a cooling model of wall-mounted air conditioning and the difference in inlet angle and air inlet velocity. The room design was constructed using SolidWorks software. Air distribution observations were created using ANSYS Workbench simulation software. The use of a supply angle of 90° results in an even distribution of air with a low inlet velocity, whereas in conditions of a supply angle of 60° requires a higher inlet speed. Thus, the uniform air distribution is able to be realized by the proper configuration which results an appropriately room temperature and saves energy usage.

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Section: Introductionmentioning

confidence: 99%

Investigation of Air Distribution in Mosque Rooms with Different Angles of Supply and Inlet Velocity

Harsito¹,

Permata²

2021

IJHT

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“…However, according to [25], floor air conditioning (FAC) is more energy-efficient and is in growing demand. The problem with FAC is draft discomfort because the supply air is closer to the occupants.…”

Section: How Is It Calculated?mentioning

confidence: 99%

“…The problem with FAC is draft discomfort because the supply air is closer to the occupants. Different locations for the FAC in a residential unit is assessed by [25], and it is recommended that the outlets be located as far from occupants as possible to reduce draft discomfort. According to [24], floor air condition can achieve the best performance with a 45° deflection angle on a 1.1m sill, with an optimum supply velocity of 2.2m/s -3 m/s.…”

Section: How Is It Calculated?mentioning

confidence: 99%

A BIM-Based Approach for Optimizing HVAC Design and Air Distribution System Layouts in Panelized Houses

Baradaran-Noveiri¹,

Zaheeruddin²,

Han³

2020

Proceedings of the 37th International Symposium on Automation and Robotics in Construction (ISARC)

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A BIM-Based Approach for Optimizing HVAC Design and Air Distribution System Layouts in Panelized Houses Pouya Baradaran-NoveiriIn a centralized air distribution system, the designed ductwork layout impacts the system performance and the construction time and cost. Engineers face various challenges, including spatial limitations, leading them to use assumption-based design methods to balance their design with construction requirements. As a result of this shortcoming, insufficient design details for construction and improper coordination between designers and trade workers will occur, increasing the project duration and risk for conflicts. As the construction industry shifts towards off-site and fast-paced construction methods, the design processes must comply with construction requirements to ensure a smooth transition from conventional methods to off-site construction.This research provides a scientific and systematic method for design and optimization of the HVAC air distribution system in terms of the ductwork layouts, and sizes and types of ducts to standardize the construction processes for time and cost reduction in the off-site environment. The proposed methodology utilizes Building Information Modeling for coordination of the air distribution system using a 3D database. Furthermore, a trained genetic algorithm processes the data and identifies alternative solutions. As the final step, the algorithm generates the optimal air distribution system in the BIM 3D environment for a visual assessment and detailing. The results are verified based on existing case studies in the Canadian prefabricated, panelized construction iv company. The potential benefits include 23% savings in duct material whilst providing an integrated design solution with 32% less conflicts per day comparing to traditional design methods, which can potentially save about $10,119.5 and 175 man-hours per week.v Acknowledgments I would like to express my deepest gratitude to my supervisors Dr. SangHyeok Han and Dr.Mohammed Zaheeruddin, for their continuous guidance, encouragement, and patience with me through the past two years and even in the hardest times during the worldwide pandemic they never neglected to show their support. I would like to thank faculty members of Concordia University, including but not limited to Dr. Mazdak Nikbakht and Dr. Mohammed El-ebbasy for always having their doors open for me and helping me with establishing my place as a Master of Applied Sciences student in the department of BCEE. I would like to thank faculty members of Dalhousie University, including but not limited to Dr. Nouman Ali and Dr. David Hansen for encouraging me and providing guidance as I was graduating with a bachelor's degree in civil engineering and making my way towards higher education. Greatest gratitude will be to my family for supporting me with all my decisions in the good times and the hard times and always encouraging me to do better and become the best version of my self. I would like to thank my colleagues Alaa Hebiba, Sobhan Kouhest...

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“…Typically, thermal comfort can affect the worker's perception rates, productivity, and health [8][9][10]. Based on ASHRAE Standard 55 [11], "thermal comfort is the condition of mind which expresses satisfaction with the thermal environment".…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Thermal Comfort Inside the Kitchen of Non-Airconditioned Railway Pantry Car

Alam¹,

Salve²

2021

IJHT

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There are ample literature studies available, focusing on hot-humid built environment, which have achieved an increase in thermal comfort conditions by proper installation of ventilation-systems. The present thermal comfort study has been carried out in the kitchen environment of a non-air-conditioned railway pantry car in Indian Railways. The purpose is to enhance thermal comfort level under the currently applied ventilation system inside the kitchen of pantry car by determining the standard effective temperature (SET) index. During the summer and winter seasons, a field study was carried out to obtain the value of air temperature, globe temperature, relative humidity, and air velocity inside the pantry car for estimation of the SET index. A computational fluid dynamics (CFD) analysis was used to obtain a better-modified case model of the pantry car kitchen for the improvement of thermal comfort. The design interventions for the pantry car kitchen were created, with emphasis on increasing energy efficiency based on low-power consumption air ventilation system. The study results indicated that, modified case-I model has a better ventilation design concept as compare to the existing and other models, which increased the air velocity and significantly decreased the air temperature inside the kitchen of pantry car at all cooking periods. A value of SET (28.6–30℃) was found with a comfortable thermal sensation within all cooking periods, which is better for the pantry car workers. This finding suggests a sustainable improvement in the thermal environment of the "non-air-conditioned" pantry car kitchen in the Indian Railways, which can be applied immediately.

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Effect of Air Conditioning Position on Thermal Comfort in the Floor Air Conditioning System

Cited by 7 publications

References 7 publications

Investigation of Air Distribution in Mosque Rooms with Different Angles of Supply and Inlet Velocity

Investigation of Air Distribution in Mosque Rooms with Different Angles of Supply and Inlet Velocity

A BIM-Based Approach for Optimizing HVAC Design and Air Distribution System Layouts in Panelized Houses

Enhancement of Thermal Comfort Inside the Kitchen of Non-Airconditioned Railway Pantry Car

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