Thermal Comfort in Buildings Explained - HVACR Design
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Date: 2023-11-17
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Comments and reviews: 8
Joseph
Dont overlook that different people require different temperatures to feel comfortable! 72 degrees at 35 to 40 rth. Is a laboratory perfect environment, however some people like it hot dry some people like it cold and wet, the goal is a baseline of 72 degrees with a relative humidity of 35 degrees! Impossible to achieve to exact but a great baseline for engineers to accommodate no matter what geographical orientation you have to climates one person to figure out how to make hundreds of different personalities of comfortably with pre existing equipment design to obtain one goal 72 degrees with relative humidity of 35 to 40?
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Dont overlook that different people require different temperatures to feel comfortable! 72 degrees at 35 to 40 rth. Is a laboratory perfect environment, however some people like it hot dry some people like it cold and wet, the goal is a baseline of 72 degrees with a relative humidity of 35 degrees! Impossible to achieve to exact but a great baseline for engineers to accommodate no matter what geographical orientation you have to climates one person to figure out how to make hundreds of different personalities of comfortably with pre existing equipment design to obtain one goal 72 degrees with relative humidity of 35 to 40?
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Red
One thing I find interesting is how different rooms feel differently even at the same temp. For example I always find at work it feels colder than at home, even at a given temp. 23 at home feels boiling hot and I'll be sweating, but 23 at work feels cold. I guess the humidity and the air velocity might play a role. At home there is less air velocity and more humidity while at work there's constant airflow and low humidity. We actually have a 3 phase 208v humidifier but it can't keep up! It's never ran well though. it spends more time in clean cycle than actually putting out.
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One thing I find interesting is how different rooms feel differently even at the same temp. For example I always find at work it feels colder than at home, even at a given temp. 23 at home feels boiling hot and I'll be sweating, but 23 at work feels cold. I guess the humidity and the air velocity might play a role. At home there is less air velocity and more humidity while at work there's constant airflow and low humidity. We actually have a 3 phase 208v humidifier but it can't keep up! It's never ran well though. it spends more time in clean cycle than actually putting out.
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VictorMistral
Metabolic rate is more then activity related. I find it confortable from 18 to 20-21 C, some just are freezing, even at 23-24C, while sitting. The body adapts to temperature quite well, given proper time and constance. I find that is summer, 20 is a bit cool, not moving, but in winter, when it's -30, a find a 15C just about as cold. Then there are some people are just 'build' for warmer or colder temperatures.
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Metabolic rate is more then activity related. I find it confortable from 18 to 20-21 C, some just are freezing, even at 23-24C, while sitting. The body adapts to temperature quite well, given proper time and constance. I find that is summer, 20 is a bit cool, not moving, but in winter, when it's -30, a find a 15C just about as cold. Then there are some people are just 'build' for warmer or colder temperatures.
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Capthrax1
Le maintenance guy.
Office set at 68 to 70
Gets new office employee
She be like I'm cold 'its freezing in here'
You were told about the temp of the office during the interview correct?
Well yes but that thermostat is wrong!
Me, wiping a disgusting bucket of sweat off of my forehead, you can always wear a jacket or something.
It doesn't match my summer cloths
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Le maintenance guy.
Office set at 68 to 70
Gets new office employee
She be like I'm cold 'its freezing in here'
You were told about the temp of the office during the interview correct?
Well yes but that thermostat is wrong!
Me, wiping a disgusting bucket of sweat off of my forehead, you can always wear a jacket or something.
It doesn't match my summer cloths
reply
Franky
Feel like a static isometric with the high velocity path being highlighted would have been easier to visualise, than a scrolling section view. otherwise helpful, also was looking forward to the ashrae chapter regarding thermal comfort to be highlighted.
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Feel like a static isometric with the high velocity path being highlighted would have been easier to visualise, than a scrolling section view. otherwise helpful, also was looking forward to the ashrae chapter regarding thermal comfort to be highlighted.
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Varr
Too many architects rely on mechanical engineers to solve these issues. As an architect, I design buildings to minimize the need for, and size of, mechanical systems from the start. Almost all mechanical engineers love this.
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Too many architects rely on mechanical engineers to solve these issues. As an architect, I design buildings to minimize the need for, and size of, mechanical systems from the start. Almost all mechanical engineers love this.
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Rodrigo
Nice video! You made an easy way to explain the basic concepts of thermal engineering. waiting your video of psichrometric chart.
Regards!
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Nice video! You made an easy way to explain the basic concepts of thermal engineering. waiting your video of psichrometric chart.
Regards!
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Justin
Im an MEP engineer. Thank you for these! They explain these systems to my new hires better than I can.
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Im an MEP engineer. Thank you for these! They explain these systems to my new hires better than I can.
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