Hey Paul !! Now you Got Advertisement on your Video :D I AM your oldest follower , Now you not only buy a coffee but also Dinner for your team Hhahah Great , God Bless You and Your Team :-)
+Muhammad Zaroon yeah great to see you back again, thanks for being part of the community. Unfortunately the websites shown were not paid ads they are genuinely websites I used at university so I just recommend them. We're not in it for the money, we enjoy helping engineers all around the world, but if we can get some funding it would be great to make even better quality videos.
I am using Brine(Methanol+water) as a fluid to maintain the temperature below -5 , then how should I take the specific heat capacity, density and volumetric flowrate?
I'm a Master HVAC Tech. In New Jersey, I would be interested in you explain how to properly size FCU's ( chilled and heat) How determine pump size. Thank you
hi sir can you help me am working on chiller its efficiancy dicriasing from time to time & there is an alarm low pressure analog it disterbs the broduction
great work👏👏👏. my question is why we take average temperature for this calculation? secondly I have problems in calculating IPLV and NPLV of chiller. could you tell us what these values are and how to calculate them? I request you to make videos on pump head calculations, heat rejection by cooling tower. I know I am asking you too much but believe me you are inciting us to become complete HVAC Engineers.
Great videos mate. I may be wrong but I think you had to divide the temp difference by 2 to get the average of the temperature as per your original formula. I stand corrected.
hello 2 questions that I have 1 If using chiller manufacturers flow curve chart do i still need to add the n density factor or thats built into that? 2 Necessary to convert to Kelvin vs Celsius? more accurate? thank you! stan
Hi, Great video ! Thank you very much for sharing. There is an error in the water density unit (in the definition) : kg/m instead of kg/m3. But the wright unit is used in your calculation. Best regards.
Hi, i dont understand some things about chillers. I need to get down the temperature (from 36°C to 26°C) of a outdoor pond (24,000L), i know that in this case i need 1,713,168 btu to get down the temperature 10°C, but when the temperature getdow at 26°C, i will still need 1,713,168 btu to maintend the temperature at 26°C, or it wil be needed more or less btu ?. what factor i should to consider for make the calculation?. Thanks for the help
you decide a flow rate and then decide what temperature you want the water to return at and what the water temperature will be coming from the pond, or make assumptions and follow this video
The water is pumping through the evaporator (so in answer to your question the pump is for both inlet and outlet) and continues to the Fancoil units within the building. The compressor drives refrigerant through both the evaporator and condenser without mixing with the water in either (the evap or cond). The condenser has it's own pump that circulates the water through the condenser and up to the cooling tower. These constitute 3 separate circuits that never mix. I hope this helps.
waoo cool video, I have Senior project deal with Thermal Energy system. after watching this video it open my mind how to get the job done. thank so much .
Hey, small type at 6:44. I believe the value of BTH/hr needs to be on the 8 million range, now it’s at 800 thousand range. Your imperial value at 9:13 is correct.
Hi Paul. Thank you so much for making engineering so simple to understand. Requesting you to make a video on detailed sizing & component selection calculations for Chiller/Heat Pump.
Excellent video. I have 1 doubt please solve it. From internet i saw this formula relation GPM = 24*TR/delta T This is for water. Now for derivation of this relation: We know from heat equation m*c*deltaT = TR*3.52 Where m=mass flow rate of water in kg/sec, c= Specific heat of water in KJ/Kg-C, TR= Tonnes of refrigeration. Now m = Density*volume flow rate Now putting, c = 4.2 KJ/Kg-C and Density = 1000 kg/m3 We get, 4200*Volume flow rate (m3/s)* deltaT = TR*3.52 Solving, Volume flow rate = (3.52/4200)*(TR/deltaT) m3/s Now to convert it in GPM we know 1 m3/s = 15850 GPM So, V = 13.3*TR/deltaT These 2 relation is not matching. Please check and tell where i am doing wrong. I have checked multiple times. Please help.
Hi Paul how r you? Chillers circuit consist of 35% glycol & 65% water and you have mentioned specific heat capacity of water only ? Is glycol has the same specific heat capacity as water? If not what is specific heat capacity mixture of water and glycol?and what’s the density per kg? Thanks Paul
Hi, first of all I want to thank you for taking up our design knowledge to another level thru these videos, one request calculation of vrf/vrv outdoor unit will be really appreciated.
As slamu alaikm I am from Pakistan where you living ,I am talking in Urdu,English also,, yet brother,there has conversation 2 calculation and the answer is same,please tell me what is this,there parameters is different and answer is what happen this please given me a answer,quickly fast.
Thank Sir, I have a question that same formula can be used for air medium to calculate the Air conditioner cooling capacity. Or any thing different to be used. If any pls make it as a video.
Nice video sir , could you please upload the video related to compressor capacity calculation of refrigeration system ? Compressor is driven by electric power so why do we show capacity of compressor in TR instead of HP ?
This is semantics really and should not take away from the awesome video (I'll still buy you a coffee Paul) but the final calculation for BTU/h is not correct. I believe it was just a typo but it should be 8,530,355 BTU/h. If you figure 12000BTU per 1 RT. 12000 x 711 = 8,532,000. If you rather 3412.142BTU per 1KW. 2500 x 3412.142 = 8,530,355 BTU/h. BTW I have learned more watching your videos than studying any other format. Excellent work and I particularly like the blender 3D renderings of the machinery. Best wishes.
nice video, excellent explanation. just a little bit error in some unit & results computation. i just have a question how can we design the building cooling capacity. meaning what cooling capacity do we install, pls. indicate all the parameter or the requirements for the right design. hope you answer my question. i wait for it.
Thank for your video, but I’m still a little confused about the temperature difference. While chillers are turned on or off, the outlet temperature will change drastically causing the temperature difference also change. Should I take the temperature difference in the two time period as normal or there is another way to tackle it. Thanks.
Thank you for replying, so to adjust do i have to do it like this? correct me if i am wrong 1000 kg/m3 (water density) + 1100 kg/m3 (glycol density) = 75% of water density (750 kg/m3) + 25% (275 kg/m3) = 1025 kg/m3 ? How about CP values ? how to adjust it ? and where can i get CP value of glycol? Also i have seen in another video following formula for Capacity (Tons) = Sp heat x Sp gravity x fluid flow rate x Delta T/ 24. I wonder if this can be applied as well? please support. Regards,
How? was explained early into the video ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-BZxXIdxVKeY.htmlm52s Why? because it will produce more accurate figures using average compared to highest or lowest values
