Thank you so much to this very informative video and the previous one, P1. many useful and to point info. I would like to get a copy of the programme if possible. Thank you once again
Hi, Very nice video and explanations. Can you post on the Effective Room Sensible, Grand Heat Sensible, and cooling Coil By-pass factor? Also what happened in the case for Fresh air handling units?
hey there, if I am dealing with the internal sensible gains with a VRF system separately (i.e I'm just trying to remove heat from outside at AHU) can I provide a CFM based on a required ACH? Then I can size the coil based on that CFM? thanks
If air at dry bulb temp at 36 deg C, RH 42 %, can i cool the air upto 11 deg C by directly adding chilled water into air through evaporatorive cooler. What is the required sprayed make up chilled water temp, quantity, amd chiller TR for makeup water? Kindly explain with calculation
The only reason "B" OAT is to calculate "C" MAT, other than than that "B" is irrelevant. The evaporator coil only sees the conditions at "C". After the air leaves the coil it will be sensibly warmed by the blower, duct, and space at the SHR ratio. RH will fall from near 95% as it passed through the coil, to the design RH in the "A" space.
Could someone leave a timestamp on how did he calculate and find the latent heat? And how do you get different cfm between supply and return? Most blower motor are constant rated
1) Take your outside wet bulb and dry bulb and mark it on the chart where they meet. 2) Take your inside wet bulb and dry bulb and mark it on the chart where they meet. 3) Draw a strait line between them. 4) Mark another point on the chart along the line you drew at the percentage between the marks that your outside air damper is open.
Great explanation, I like to know the significance of Index point, what it tell us. Is any SHR line should go through this index point?
How did you come up with 47,000 BTU at the Part load SHR?. I am learning so much on your video. Thank you very much for your time.
Thank you so much to this very informative video and the previous one, P1. many useful and to point info. I would like to get a copy of the programme if possible. Thank you once again
Amazing Video, learnt a lot
Really Appreciated, Like & Subscribed.
Thank u!
Hi, Very nice video and explanations. Can you post on the Effective Room Sensible, Grand Heat Sensible, and cooling Coil By-pass factor? Also what happened in the case for Fresh air handling units?
Hi, I would like to know which program you use for psychrometric chart?
hey there, if I am dealing with the internal sensible gains with a VRF system separately (i.e I'm just trying to remove heat from outside at AHU) can I provide a CFM based on a required ACH? Then I can size the coil based on that CFM? thanks
Is the vrf handling all of the load except the OA? The dog so then yes it sounds right to me.
But I would run by someone in person. I may be missing something since we are only talking I’ve comments.
If air at dry bulb temp at 36 deg C, RH 42 %, can i cool the air upto 11 deg C by directly adding chilled water into air through evaporatorive cooler.
What is the required sprayed make up chilled water temp, quantity, amd chiller TR for makeup water?
Kindly explain with calculation
but how did you draw with the ruler on the screen?
Magic! Actually it’s just an image we imported into power point. Thanks for watching!
Please explaine what is an index point?
At 19 min: Why SHR lines needs to connect with supply temperature point A and not with outside air temperature point B?
The only reason "B" OAT is to calculate "C" MAT, other than than that "B" is irrelevant. The evaporator coil only sees the conditions at "C". After the air leaves the coil it will be sensibly warmed by the blower, duct, and space at the SHR ratio. RH will fall from near 95% as it passed through the coil, to the design RH in the "A" space.
Hi, when you are going to upload part 3
Very soon!
czcams.com/video/hhsAsyX3VBc/video.htmlsi=vArW_cdxI-OjZyRq
Index point is 75 DB @ 50% RH. I think.
Could someone leave a timestamp on how did he calculate and find the latent heat? And how do you get different cfm between supply and return? Most blower motor are constant rated
1) Take your outside wet bulb and dry bulb and mark it on the chart where they meet. 2) Take your inside wet bulb and dry bulb and mark it on the chart where they meet. 3) Draw a strait line between them. 4) Mark another point on the chart along the line you drew at the percentage between the marks that your outside air damper is open.
@@HVAC559 thanks!
looks lie your index point is @ 75 DB instead of 78. Great video nonetheless