[BLDG-SIM] one more thing about ERVs in eQuest
Brandon Nichols
BrandonN at Hargis.biz
Sun Nov 11 17:47:58 PST 2007
Hi Karen,
Without seeing all the details, its hard to offer specific
recommendations. However one thing I would be sure to do is a reality
check -- following is a report from a nifty outside air load estimator
that I just found earlier today in the course of doing something else
(see this post
<http://elcca-exchange.blogspot.com/2007/11/outdoor-air-load-estimator.h
tml> ) which, after running your numbers through it, gives cause for
double-checking your calculated $450,000 per year savings (again, see
post for details).
HTH
Brandon
************************************************************************
********************
Result summary for Calculation Number: 5
Location: BURLINGTON, Vermont
Elevation: 341 ft
Operating Hours: 0:00 o'clock until 0:00 o'clock
Hours of Operation: 24
Makeup Air Flow: 183000 cfm
Thermostat Setpoints: Heating = 68 F, Cooling = 72 F
Dehumidification was set to limit the Relative Humidity to: No
Dehumidification
Heating was locked out during: --
Cooling was locked out during: --
The Lockout of Heating or Cooling systems resulted in...
Insufficient Heating during: --
Insufficient Cooling during: --
The Heating Design Load is: 18891.3 kBtu/h
The Cooling Design Load is: 4754.9 kBtu/h
Calculated Monthly loads:
Month Heating Load Cooling Load
January : 7,847,593 kBtu 0 kBtu
February : 7,329,964 kBtu 0 kBtu
March : 6,296,320 kBtu 0 kBtu
April : 3,911,545 kBtu 28,900 kBtu
May : 1,574,753 kBtu 97,140 kBtu
June : 889,352 kBtu 128,736 kBtu
July : 399,761 kBtu 382,194 kBtu
August : 532,923 kBtu 221,369 kBtu
September : 1,517,449 kBtu 33,329 kBtu
October : 2,836,548 kBtu 0 kBtu
November : 4,821,821 kBtu 0 kBtu
December : 6,956,354 kBtu 0 kBtu
Total_Year : 44,914,382 kBtu 891,668 kBtu
FAN ENERGY CALCULATIONS:
Supply Exhaust
Total Static Pressure: 3.5 inW 1.0 inW
Fan Type: Forward_Curved Forward_Curved
Fan Efficiency: 63.0 % 63.0 %
Motor Class: Standard Standard
Motor Efficiency: 91.0 % 89.0 %
Motor Output Power: 159.032 HP 45.438 HP
Moter Rated Input: 130.319 kW 38.071 kW
Motor Energy Consumption: 1141594 kWh 333499 kWh
************************************************************************
********************
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
-----Original Message-----
From: BLDG-SIM at gard.com [mailto:BLDG-SIM at gard.com
<mailto:BLDG-SIM at gard.com> ] On Behalf Of Karen Walkerman
Sent: Friday, November 09, 2007 7:09 AM
To: BLDG-SIM at gard.com
Subject: [BLDG-SIM] one more thing about ERVs in eQuest
Also, how does one properly model an ERV for a system that is not 100%
outdoor air? How does it get modeled if the ventilation is demand
controlled?
--
Karen Walkerman
Second Law
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