Re: [TRNSYS-users] Question about a line in Type941 source code

To: "TRNSYS users mailing list at the Solar Energy Lab, UW-Madison" <trnsys-users@cae.wisc.edu>

Subject: Re: [TRNSYS-users] Question about a line in Type941 source code

From: David BRADLEY <d.bradley@tess-inc.com>

Date: Fri, 19 Apr 2013 12:03:36 -0500

In-reply-to: <016001ce3d18$7cfda470$76f8ed50$%Li@dit.ie>

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Zhe,
lps_air is the volumetric flow rate of the air (in liters per second) and rho_air_dry_in is the density (in kg/m3) of the dry air at the heat pump inlet temperature.
Best,
David

On 4/19/2013 11:11, Zhe Li wrote:

Dear All,

Thank you for your time.

I am trying to understand how TRNSYS calculates power output from this air-water heat pumps (Type941).

I am stuck in a line which I don’t know what the two terms are standing for?

! Determine the dry air mass flow rate

Flow_air = lps_air*3.6*rho_air_dry_in

Could somebody let me know what are the lps_air and rho_air_dry_in standing for?

I hope I did not break TRNSYS source code rule by asking this question.

Thank you for your help in advance.

Zhe Li

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