[Bldg-sim] Query regarding modelling of secondary air stream in two stage evaporative cooler

[Duggin, Cory via Bldg-sim]

You could model this system in IESVE by making a small modification to the prototype indirect/direct evaporative cooling system.

Cory Duggin, PE, LEED AP BD+C, BEMP
Principal/Energy Modeling Wizard
615-346-1939

On Jul 19, 2017 7:14 AM, Priyam Tewari via Bldg-sim <bldg-sim at lists.onebuilding.org> wrote:
Dear Jim

The two-stage evaporative cooler consists of an indirect heat exchanger and direct evaporative cooler. The first stage usually employs indirect contact cooling of primary air stream using another air stream called secondary air stream. For my research work I am considering a wet-coil indirect evaporative cooler. Below is the diagram of secondary and primary air streams used in an indirect evaporative cooler.

[Inline image 1]

I wish to recirculate the secondary air stream (in proportion) to the zone which is generally exhausted to atmosphere.Please find attached the block diagram of what I intend to do.
Hope the block diagram clearly explains the problem.  It will be great if anyone can guide me through.

Thanks

Priyam Tewari
PhD Research Scholar,
Centre for Energy & Environment,
Malaviya National Institute of Technology,
Jaipur (Rajasthan).

  *

On Wed, Jul 19, 2017 at 3:13 PM, Jim Dirkes <jim at buildingperformanceteam.com<mailto:jim at buildingperformanceteam.com>> wrote:
Dear Priyar,
Please include a sketch which explains what you want to do. At the moment, it's not clear to me.

On Wed, Jul 19, 2017 at 01:29 Priyam Tewari via Bldg-sim <bldg-sim at lists.onebuilding.org<mailto:bldg-sim at lists.onebuilding.org>> wrote:
Dear All

I am working on modelling of a two stage evaporative cooling system on EnergyPlus. Supply side air loop consists of an Indirect Evaporative Cooler Research Special and Direct Evaporative Cooler Research Special. I am trying to recirculate some percentage of secondary air stream (exhaust from the indirect heat exchanger) inside the zone and throw out the remaining to ambient. Energy Plus considers secondary air outlet stream as  a part of non-parent loop and so it is not running. It will be really great if anybody can guide me on how modelling of secondary air stream can be done on EnergyPlus or any other software?

Thanks
Priyam Tewari
PhD Research Scholar,
Centre for Energy & Environment,
Malaviya National Institute of Technology,
Jaipur (Rajasthan).

  *

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