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Re: [EnergyPlus_Support] Re: Heat Recovery Option for Compact HVAC: Unitary appears to not work



Hi Linda,
I tried the heat recovery model with 2.0 and 2.2. -- similar results.
Jim McNally
 

----- Original Message ----
From: Linda Lawrie <linda@xxxxxxxxxx>
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Sent: Monday, September 8, 2008 8:51:29 AM
Subject: Re: [EnergyPlus_Support] Re: Heat Recovery Option for Compact HVAC: Unitary appears to not work

Is this with Version 2.2 or an earlier version?

Linda

At 07:47 AM 9/8/2008, jim_mcnally wrote:

A bit more info about the heat recovery problem. Using a shoe-box model and compact HVAC, I ran several outside air percentages. Results are below.

RUN-1: 0% outside air = 5,126 therms/year

RUN-2: 30% outside air = 21,635 therms/year

RUN-3: 100% outside air = 64,344 therms/year

RUN-4: 100% outside air with 70% efficient heat recovery=64, 344 therms/year . [I was expecting an answer of about 21,000 therms.]

The heat recovery mechanism had negligible effect. The Compact HVAC part of the model is shown below for Heat Recovery. Am I missing something, or have I come across a bug in Energy Plus?

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