Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question
1

Rated Supply Fan Power Per Volume Flow Rate

asked 2020-05-20 12:56:10 -0600

sspielman's avatar

updated 2020-05-21 08:31:01 -0600

What is "Rated Supply Fan Power Per Volume Flow Rate" it is in the openstudio single speed DX heating and cooling coil object but not described in the input output reference.

Is it the "Rated Evaporator Fan Power Per Volume Flow Rate"

edit retag flag offensive close merge delete

1 Answer

Sort by ยป oldest newest most voted
3

answered 2020-05-20 14:53:07 -0600

These are:

But for DX Htg Coil, the energyplus corresponding object field is "Rated Supply Fan Power Per Volume Flow Rate", see image below

image description

It is worth to note both values do not directly affect simulations results in term of temperatures and energy consumptions.

edit flag offensive delete link more

Comments

Thanks Ag, you said - "It is worth to note both values do not directly affect simulations results in term of temperatures and energy consumptions."

Why bother having them as inputs if they don't affect the simulations?

sspielman's avatar sspielman  ( 2020-05-20 17:13:29 -0600 )edit
1

Usually "Rated" input fields allow EnergyPlus to calculate capacity or efficiency metrics of HVAC components from an industry standardized set of conditions. For single-speed DX cooling coils, this is ANSI/AHRI Standard 210/240 for standard rating cooling capacities under 19 kW (<65,000 Btu/hr) and ANSI/AHRI Standard 340/360 for standard rating cooling capacities from 19 kW to below 73.2 kW (65,000 Btu/hr to <250,000 Btu/hr).

Aaron Boranian's avatar Aaron Boranian  ( 2020-05-20 18:41:24 -0600 )edit
1

[cont.] These are informational outputs logged in the EIO and sometimes HTML files so that you can then review SEER and other rating metrics typically used to define HVAC components. This is why they "do not directly affect simulations results in term of temperatures and energy consumptions" -- they are just used to calculate SEER and other rating metrics. HSPF would be an example metric for DX heating coils.

Aaron Boranian's avatar Aaron Boranian  ( 2020-05-20 18:45:32 -0600 )edit

that is great to know! thanks for the clarification Aaron!

sspielman's avatar sspielman  ( 2020-05-21 14:20:58 -0600 )edit

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Training Workshops

Careers

Question Tools

1 follower

Stats

Asked: 2020-05-20 12:56:10 -0600

Seen: 219 times

Last updated: May 20 '20