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Type: Posts; User: kurrodu

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  1. Replies
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    HCFC R123 or R143a

    Trane is offering chillers with R123 for a 1500 Tr centrifugal chillers. York is offering 1500 Tr centrifugal chillers with R 143a

    I agree that R123 would be phased out.

    Which is a better...
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    Can 1500 TR centrifugal chiller be air cooled ?

    I noticed that most of the district cooling plants usually centrifugal chillers of 1000Tr or more are water cooled. Can they also be air cooled where water is scarce?
  3. Replies
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    Economics of District Cooling

    I have read many articles and papers about district cooling being more efficient. I agree with that. But could anyone comment on the economics of it. What would be the difference in price for the...
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    Gmcd- Thank you for your input earlier. Let me...

    Gmcd- Thank you for your input earlier. Let me know your name so that I can address you properly. Regarding thermo active slabs, If the cooling loads are high as 100 W/m2, then do you think we can...
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    gmcd: I was knocked out last week itself when I...

    gmcd: I was knocked out last week itself when I read those papers. There is a lot of information. I don't think we can model them from first principles. I got the picture from his presentation...
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    gmcd: I wish had you on my team, coz this is...

    gmcd: I wish had you on my team, coz this is something we are doing it for the first time and it is a steep learning curve for us. Yes we are trying to also design a DOAS (dedicated outdoor air...
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    gmcd: PEX Pipe work is cast in the concrete slab...

    gmcd: PEX Pipe work is cast in the concrete slab itself works a radiant ceiling, but response time is slow. But the system takes advantage is the system uses the thermal mass of the concrete (it...
  8. Replies
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    gmcd: can you post links to pictures of ductwork...

    gmcd: can you post links to pictures of ductwork that you would prefer when using radiant slab ceiling.
  9. Replies
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    gmcd : Thank you for your patience and...

    gmcd :
    Thank you for your patience and describing everything in detail. We are trying to design a concrete core conditioning for a building (to remove sensible loads) and a dedicated outdoor air...
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    1

    1
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    We are planning to use concrete core conditioning...

    We are planning to use concrete core conditioning (thermo-active slab) in the building.
    So we wouldn't have suspended ceilings where duct work could be hidden. So we would have to expose the...
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    It is a system where you use outdoor air...

    It is a system where you use outdoor air completely to supply the conditioned air into the building. The heat recovery of the supplied air will be done by the enthalpy wheel.

    No recirculation of...
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    Yes the standard is ASHRAE.

    Yes the standard is ASHRAE.
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    Hey, I graduated from Arizona State...

    Hey,

    I graduated from Arizona State University. I am in India at this moment. I am not trying to size it for a real job!. The whole intention was to design a radiant cooling system for a 960 sqmt...
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    Dan, I am new to this HVAC-Talk forum. I will...

    Dan,

    I am new to this HVAC-Talk forum. I will register as a professional member soon and A.S.U stands for Arizona State University.
  16. Replies
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    Use of Chilled Beams

    Does the HVAC industry in the US use Chilled beams for cooling ? or thermo active slabs like in germany?
  17. Replies
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    Fabric Ductwork

    What are the advantages of fabric ductwork ? Is it cheaper than the conventional metal ductwork?
  18. Replies
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    681

    Control Manufacturer

    Most of them by Honeywell
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    Can some tell me what software is this

    I need software to model a dedicated outdoor air system.

    Can some one tell me what software is this ?

    http://www.flickr.com/photos/22432717@N03/2161923552

    Is it easy to learn and use? and...
  20. Replies
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    Thank you

    Hey thanks for the feedback. I am a mech engineer my self learning just graduated from ASU. I am doing this project on paper trying to learn. In reality this is not a project that I am going to...
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    AHU Sizing

    I did the heat loads using design builder for a 1000 sqmt office space divided into 4 equal zones.

    It has a cooling load of 100 W/sqmt

    So I plan on using 40 TR Chiller. I think I need to use 1...
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    Air handling Unit sizing

    Can some one guide me on accurate sizing an AHU. 1.5 air changes /hr ? is that right value for an office space? or 8 lit/person?

    thanks

    Kurrodu
  23. Replies
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    Power Consumption of an aircon

    how do I accurately find the power consumption of the air conditioner (AHU and heat pump separately) for whole year. I have the cooling loads for every hour for a whole year. Since the performance...
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    Sizing of an aircon

    I am trying to calculate the the total power consumption for a 1000 sqmt square building which is divided into 4 equal zones. with no floors on top.

    I designed the building using design builder...
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    Radiant Cooling

    Radiant cooling seems to be a nice choice for hot dry climates. The radiant ceiling panels seem to be very expensive.

    any thoughts ?

    Kurrodu
  26. COP of an Air conditioner at difference temperatures

    Where will I be able to get graphs of COP Vs Temp for air conditioners.

    I need the graphs for both air cooled and water cooled.

    Looking forward for your response.

    Thank U

    Kurrodu
  27. Replies
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    thank you

    thank you all for your replies.

    Kurrodu
  28. Replies
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    Refrigeration Units

    Can some one please clarify this for me.

    1TR = 3.516 KW

    Power consumption by the 1 TR air-conditioner is 1.8 KW. So how is the air-conditioner taking 1.8 KW and giving out 3.516 KW.
    ...
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