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Hi LittleInch, Thanks for your immediate response. I actually did a search related to this topic before I posted mine. Unfortunately I wasn't able to see one answering question on how to raise the liquid at a certain vertical distance from the ground level without considering the Elevation...

Hi, I am just a beginner in HVAC & there are lots of things that are for me, quite confusing. One of those are Elevation Head in a Closed-loop Chilled Water System. To calculate for the TDH of a Closed-loop Chilled Water piping system, one should consider the Velocity head + Friction Head...

Thank You for the reply.

I think there is a difference between them. By formula, TDH = Pressure Head + Velocity Head + Elevation Head - Head Loss(friction head loss) TDH = ((P2-P1)/specific weight) + ((V2-V1)/2g) + (Z2-Z1) - Head Loss And also, formula for Hydrostatic Pressure Head is P = (specific weight) *...

Hi I am confused with the Difference between Static Head (Elevation Head) & Hydrostatic Pressure Head. Can anybody help me with this? Thanks in advance.

I do understand the complexity of a multiple-hood system. But the main problem here is the termination point of the KED for those ten (10) Food Retails. This is a Shell & Core 10-storey building. Business Process Outsourcing (BPO) at 4th-10th Floor with Retails at the Ground Floor. Second &...

Thanks for all your reply. It helped me a lot. Thanks so much

Hi Bill The design is to provide Centralized Kitchen Exhaust Duct w/ Centralized Kitchen Exhaust Fan because of limited means of termination point. The Architect does not want to terminate all of those individual Kitchen Exhaust Duct to Roof because it will cause ten (10) openings. The team...

Hi Bill The Centralized Kitchen Exhaust Fan is serving ten (10) Commercial Food Retails. Thanks so much

Hi I have a Centalized Kitchen Exhaust Duct. Is it okay to put a "Diversity Factor" on the the Total Exhaust rate? And what percentage? Thanks so much

Alright. Thanks so much for your time answering my questions dynamo78 [smile]

@urgross: Thank You so much. I will review static regain method. @dynamo78: Are you also using the 0.1 inch/ 100ft Rule of Thumb for Equal Friction Method?

Thanks for all your reply ^_^ Please correct me if I'm wrong because I am just a newbie in HVAC design. @willard3: Sir, you are right that I can't get the diameter if I only have flow rate that is why I am looking for the basis of 0.1 inch WC/100ft (supply) & 0.08 inch WC/100ft (return). The...

Hi How can i get the Diameter of a duct or pipe if I only have Flow Rate? And where did the 0.1inch/100ft of friction head loss comes from? Is it from experience? I can't find it in ASHRAE Handbook. Thanks in advance.