Re: [EnergyPlus_Support] Help on Vapor Compression with Customized HX Designs in Energy Plus

On Tue, Jul 16, 2019 at 8:58 PM Jim Dirkes Jim@xxxxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:

Â

Mr. Mensah,

Some answers interspersed below

James V Dirkes II, PE, BEMP, BCxP

Team Lead - Building Performance

616 450 8653

Foresight Management

https://fsmgmt.co/

Coffee Conversation:

If â??freedomâ?? is ability to do whatever we want, whenever we want and with whomever? thatâ??s lawwlessness or anarchy. Try that with traffic?. then think about what might happen if you try it with your life.

From: EnergyPlus_Support@xxxxxxxxxxxxxxx <EnergyPlus_Support@xxxxxxxxxxxxxxx> on behalf of Kwesi Mensah kwesimensah7@xxxxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@xxxxxxxxxxxxxxx>
Sent: Tuesday, July 16, 2019 3:58 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Help on Vapor Compression with Customized HX Designs in Energy Plus
Â

Â

Hello Engineers and Experts,

Please I am very new to EnergyPlus and I need guidance and direction on what to do. Apparently I do not know where to begin from actually.

Problem Details:

I am to model a vapor compression system with the Heat Exchange Configurations as showed in the Figure attached.

I have a few questions that I will appreciate to receive information on as follows;

1. In EnergyPlus, can a direction expansion vapor compression system be modelled component by component and then afterwards, connected together? (i.e. Compressor, Evaporator, Expansion device, and condenser) EnergyPlus cannot create a component-by-component refrigeration system such as you describe.

2. With the Heat Exchanger configurations, is there a similar example file that i may refer to in order to modify to suit myÂ purpose? Or, how will be the best way to model and imitate this problem? The water line in the ( Fig. A) is a secondary fluid line for free cooling purposes. And so for certain operating conditions, the mode will be switched between free-cooling (use of water) and vapor compression (circulating refrigerant)Â Â EnergyPlusÂ can create water-only heat exchanger systems and it can create what is known as a water side economizer system. This is not exactly as you describe, but probably close enough. There are two example files (distributed with E+) that demonstrate this.

3. If there are existing complete vapor compression systems, is it possible to edit the example file in order to include these designs for my simulation purposes?Â EnergyPlusÂ input files are text and can be easily edited

4. Which other programs (Apart from EnergyPlus) may be best for simulating a complete vapor compression system with these HX configurations without much complications. I am not sure....

Thank you very much and Looking forward to hearing from you.

Yours friends in urgent need and support.

Kwesi MensahÂ

Ph.D. Candidate
Mechanical Engineering Department.

Hanbat National University-South Korea
Email: kwesimensah@xxxxxxxxxxxx/kwesimensah7@xxxxxxxxxÂ /

Mobile: +82-010-8695-1702 (Korea)

skype ID: kwesi.mensah83