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OAPU Sizing

The document outlines the sizing calculations for an outdoor air processing unit (OAPU) and energy recovery ventilator (ERV). It provides the entering air conditions, maximum space humidity, target leaving air conditions, and outdoor air quantity. However, it does not include the actual cooling load or air flow values needed to complete the calculations, showing only placeholder values. The goal is to compute the new cooling load with the OAPU and ERV in place, but the summary cannot be completed without the missing data.

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coolth2
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210 views2 pages

OAPU Sizing

The document outlines the sizing calculations for an outdoor air processing unit (OAPU) and energy recovery ventilator (ERV). It provides the entering air conditions, maximum space humidity, target leaving air conditions, and outdoor air quantity. However, it does not include the actual cooling load or air flow values needed to complete the calculations, showing only placeholder values. The goal is to compute the new cooling load with the OAPU and ERV in place, but the summary cannot be completed without the missing data.

Uploaded by

coolth2
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLSX, PDF, TXT or read online on Scribd
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OUTDOOR AIR PROCESSING UNIT SIZING

assumption - OAPU only offsets the outdoor air load


Entering air condition

35 C DB

Max space humidity ratio

10.8 g/ kg 15 C DP

Off coil condition

15.6 C DB 15.2 C WB

Outdoor Air Quantity


QT

m3/s

0 KW
0 Tons

load of OAPU

Computation of new cooling load


current cooling load

tons

mass flow rate of supply air


entalphy of mixed air
new cooling load

27.2 C WB

kg/s
#DIV/0! C

#DIV/0! KW
#DIV/0! tons

85.82 KJ/kg

42.66 KJ/kg

ERV SIZING
assumption - OAPU only offsets the outdoor air load
Entering air condition

35 C DB

Max space humidity ratio

10.8 g/ kg 15 C DP

room condition

23 C DB

outdoor air quantity

m3/s

QS max

0 KW

QT max

0 KW

QS transf

0 KW

QT transf

0 KW

enthalpy of precooled air

tons

mass flow rate of supply air


enthalpy of mixed air
new cooling load

kg/s
#DIV/0! KJ/kg

#DIV/0! KW
#DIV/0! tons

60% RH

#DIV/0! KJ/kg

Computation of new cooling load


current cooling load

27.2 C WB

85.82 KJ/kg

50 KJ/kg

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