[BLDG-SIM] ERV (Energy recovery ventilation) simulation in eQuest

[Brandon Nichols]

Lan, see this post...
 
http://elcca-exchange.blogspot.com/2007/04/equest-parametric-sensible-heat.html
 
Here's an excerpt:
 
$ FLOAT gives maximum heat recovery but recovers even unwanted heat, so
$ use this setting for temperature control
ERV-TEMP-CTRL = MIXED-AIR-RESET
 
Also, the ΔT between exhaust and OSA is typically not great, even if its 110°F outside and your exhaust/relief is 85°F, the ΔT is only 25°F -- compare that to even a mild winter condition of 35°F, where the ΔT is double at equivalent exhaust temperature (i.e 85 - 35 = 50°F).
 
Regards
 
Brandon Nichols, PE, LEED(r) AP
Mechanical
HARGIS ENGINEERS

600 Stewart Street

Suite 1000

Seattle, WA 98101

www.hargis.biz

 

d | 206.436.0400  c | 206.228.8707

o | 206.448.3376  f  | 206.448.4450

 
 

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From: BLDG-SIM at gard.com [mailto:BLDG-SIM at gard.com] On Behalf Of Lan Hu
Sent: Thursday, August 30, 2007 1:54 PM
To: BLDG-SIM at gard.com
Subject: [BLDG-SIM] ERV (Energy recovery ventilation) simulation in eQuest


Hi, all,
 
I have problem simulating ERV in eQUSET. In the program I specified ERV effectiveness around 72%, the results show 64% energy saving in heating but just 5% saving in cooling, even when I cut off all the fan tempetrature increase. Anyone has experience or suggestion?. Thank you very much.
 
Lan

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