Chiller Pipe Design

[HACE609]

Hi Everyone,

I am just starting my career in the MEP design world. I was previously involved in research and development. I need advice on two topics:

1) What is the best method for sizing pipe in a chiller system (process chilling)? And what method do you use for sizing pipe in a residential plumbing system?

- Extra info: I already have the chiller sized and a required header of 4" SCH40 PVC. I'm looking at branching off of the header to 5 different lines requiring a total of 25 GPM each with 3 sets (supply/return) of 2" drops on each branch. I'm curious as to how to size the branch. I assume I need to calculate equivalent length and use the chart with pressure loss vs gpm but I'm unsure of how to calculate pressure loss. Can I calculate my start pressure (from pump) from the GPM and head? Thank you for allowing me to ask the easy questions.

2) What references do you suggest as I try and teach myself as much as possible...I'm currently working for a very busy, small MEP design shop so I need to teach myself as much as possible.

Thank you in advance for your help!

 

[EnergyProfessional]

you should design based on ASHRAE guideline (1-4 ftH2O wg / 100 ft and ~2-4 ft/s).
The ASHRAE fundamentals book will tell you a lot on the details.

 

[SAK9]

For a beginner,I would recommend the Carrier Handbook of Air Conditioning System Design over ASHRAE. Once you have got a hang of things you can move onto the AHSRAE guides for more indepth understanding of various topics.

 

[ProcessHVAC]

Residential plumbing should be dictated by your local building code.

 

[DrRTU]

One of the best known training programs.

http://unitedstates.xylemappliedwater.com/brands/bell-gossett/training-education/

Application of B&G products has been a building block in our MEP industry. I can solve 90% of designs issues with a Trane ductulator and a B&G system sizer. Carry both with you. Application of the correct velocity for the type of pipe/application is the key. Welcome to the industry. Steve.