×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

twin commercial heatpump system.

twin commercial heatpump system.

twin commercial heatpump system.

(OP)
I am putting a panasonic heatpump system PAci elite into a workshop.

The installation specs are these



Now I want it to do two floors so in cooling mode the top floor gets cooled and in heat the ground floor gets heated both at the same time.

They have 10 meters of pipe for a branch and 0.5 meters elevation rise as a limit. And its limits are for max 9.58mm and 15.88 pipe.

What will be giving those limits?

I am thinking its a pressure difference on the none return valves in the indoor units.

And the limit is due mass of fluid in lines.

Flow diagram



How stupid would be reducing the branches to 6.35mm and 9.52mm after the twin manifold instead of using reducers on the indoor units, which would halve the fluid load (hopefully giving 1 meter elevation) and then limiting the branch length to 2.5 meters to give me 2.5 meters elevation?

If my logic is wrong I can just put both indoor units in on the ground floor so not a problem but would like to get both floors if possible with cooling. Heating convection will heat the top floor.

Its a 15m by 6 m workshop vehicles on ground with second floor for workbenchs.

RE: twin commercial heatpump system.

Do not change the diameters. Velocity will go up, pressure drop will go way up. Things won't work well.

I think that if you don't obey the allowed height difference between the two indoor units then the lower unit will be favored when both are operating. Either one alone will probably work ok.

RE: twin commercial heatpump system.

(OP)
H'mm good point with the velocity pressure drop.

Maybe small cross section on the bottom and large going to the upper.

The indoor units need a coupling to the big pipe anyway. Maybe have to start looking for gauges and restrictor valves so I can tune it.

RE: twin commercial heatpump system.

(OP)
Right after some thinking.. after you excellent advice.

I can get a PACi NX Series Elite adaptive ducted unit Inverter+ • R32 which can be mounted horizontally or vertically and has various configuration options for air processing directions.

I can just make up a mounting box for it using 50mm aerated elements and then duct the air to where I want it. And as the ceiling panels are 225mm thick that should get me to under 500mm vertical separation.

Thank you for making me think...

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close