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

[Linda Lawrie <linda@xxxxxxxxxx>]

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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