VFD Compressor Minimum Speeds: Difference between revisions

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(Created page with " Email from Clay Brown on 1/2/20 See the below table for minimum speed setting for the ZPV variable speed compressors. These minimums are expressed as a percentage of the des...")
 
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{| border="0" cellpadding="5" cellspacing="0" class="Table" width="299"
{| class="Table" style="width: 397px; margin-left: -0.75pt; border-collapse: collapse; border: 1pt solid windowtext;" width="299"
|- style="height:15.0pt"
|- style="height:15.0pt"
| nowrap="nowrap" style="width:26.1pt; padding:0in 5.4pt 0in 5.4pt; height:15.0pt" width="35" | &nbsp;
| nowrap="nowrap" style="width:26.1pt; padding:0in 5.4pt 0in 5.4pt; height:15.0pt" width="35" | &nbsp;
| nowrap="nowrap" style="width: 46px; padding: 0in 5.4pt; height: 15pt;" width="42" | &nbsp;
| nowrap="nowrap" style="width: 46px; padding: 0in 5.4pt; height: 15pt;" width="42" | &nbsp;
| colspan="3" nowrap="nowrap" style="width: 263px;" width="192" | <p align="center" style="text-align:center; padding:0in 5.4pt 0in 5.4pt"><span style="height:15.0pt"><span style="color:black">MINIMUM SPEED (%)</span></span></p>
| colspan="3" nowrap="nowrap" style="width: 263px;" width="192" | <p align="center" style="text-align:center; padding:0in 5.4pt 0in 5.4pt">'''<span style="height:15.0pt"><span style="color:black">MINIMUM SPEED (%)</span></span>'''</p>
|- style="height:15.0pt"
|- style="height:15.0pt"
| rowspan="8" style="width:26.1pt" width="35" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">DESIGN RPM</span></span></p>
| rowspan="8" style="width:26.1pt" width="35" | <p style="padding: 0in 5.4pt; text-align: center;">'''<span style="height:15.0pt"><span style="color:black">DESIGN RPM</span></span>'''</p>
| nowrap="nowrap" style="width: 46px; padding: 0in 5.4pt; height: 15pt;" width="42" | &nbsp;
| nowrap="nowrap" style="width: 46px; padding: 0in 5.4pt; height: 15pt;" width="42" | &nbsp;
| nowrap="nowrap" style="width: 83px; border: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">ZPV063</span></span></p>
| nowrap="nowrap" style="width: 83px; border: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;">'''<span style="color:#2980b9;"><span style="height:15.0pt">ZPV063</span></span>'''</p>
| nowrap="nowrap" style="width: 81px; border-top: 1pt solid windowtext; border-right: 1pt solid windowtext; border-bottom: 1pt solid windowtext; border-image: initial; border-left: none;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">ZPV066</span></span></p>
| nowrap="nowrap" style="width: 81px; border-top: 1pt solid windowtext; border-right: 1pt solid windowtext; border-bottom: 1pt solid windowtext; border-image: initial; border-left: none;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;">'''<span style="color:#2980b9;"><span style="height:15.0pt">ZPV066</span></span>'''</p>
| nowrap="nowrap" style="width: 93px; border-top: 1pt solid windowtext; border-right: 1pt solid windowtext; border-bottom: 1pt solid windowtext; border-image: initial; border-left: none;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">ZPV096</span></span></p>
| nowrap="nowrap" style="width: 93px; border-top: 1pt solid windowtext; border-right: 1pt solid windowtext; border-bottom: 1pt solid windowtext; border-image: initial; border-left: none;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;">'''<span style="color:#2980b9;"><span style="height:15.0pt">ZPV096</span></span>'''</p>
|- style="height:15.0pt"
|- style="height:15.0pt"
| nowrap="nowrap" style="width: 59px;" width="42" | <p style="padding: 0in 5.4pt; text-align: right;"><span style="height:15.0pt"><span style="color:black">3600</span></span></p>
| nowrap="nowrap" style="width: 59px;" width="42" | <p style="padding: 0in 5.4pt; text-align: right;"><span style="height:15.0pt"><span style="color:black">3600</span></span></p>
| nowrap="nowrap" style="width: 83px; border-right: 1pt solid windowtext; border-bottom: 1pt solid windowtext; border-left: 1pt solid windowtext; border-image: initial; border-top: none;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">68</span></span></p>
| nowrap="nowrap" style="width: 83px; border-right: 1pt solid windowtext; border-bottom: 1pt solid windowtext; border-left: 1pt solid windowtext; border-image: initial; border-top: none;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">68%</span></span></p>
| nowrap="nowrap" style="width: 81px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">50</span></span></p>
| nowrap="nowrap" style="width: 81px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">50%</span></span></p>
| nowrap="nowrap" style="width: 93px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">50</span></span></p>
| nowrap="nowrap" style="width: 93px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">50%</span></span></p>
|- style="height:15.0pt"
|- style="height:15.0pt"
| nowrap="nowrap" style="width: 59px;" width="42" | <p style="padding: 0in 5.4pt; text-align: right;"><span style="height:15.0pt"><span style="color:black">4200</span></span></p>
| nowrap="nowrap" style="width: 59px;" width="42" | <p style="padding: 0in 5.4pt; text-align: right;"><span style="height:15.0pt"><span style="color:black">4200</span></span></p>
| nowrap="nowrap" style="width: 83px; border-right: 1pt solid windowtext; border-bottom: 1pt solid windowtext; border-left: 1pt solid windowtext; border-image: initial; border-top: none;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">58</span></span></p>
| nowrap="nowrap" style="width: 83px; border-right: 1pt solid windowtext; border-bottom: 1pt solid windowtext; border-left: 1pt solid windowtext; border-image: initial; border-top: none;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">58%</span></span></p>
| nowrap="nowrap" style="width: 81px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">58</span></span></p>
| nowrap="nowrap" style="width: 81px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">58%</span></span></p>
| nowrap="nowrap" style="width: 93px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">58</span></span></p>
| nowrap="nowrap" style="width: 93px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">58%</span></span></p>
|- style="height:15.0pt"
|- style="height:15.0pt"
| nowrap="nowrap" style="width: 59px;" width="42" | <p style="padding: 0in 5.4pt; text-align: right;"><span style="height:15.0pt"><span style="color:black">4800</span></span></p>
| nowrap="nowrap" style="width: 59px;" width="42" | <p style="padding: 0in 5.4pt; text-align: right;"><span style="height:15.0pt"><span style="color:black">4800</span></span></p>
| nowrap="nowrap" style="width: 83px; border-right: 1pt solid windowtext; border-bottom: 1pt solid windowtext; border-left: 1pt solid windowtext; border-image: initial; border-top: none;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">50</span></span></p>
| nowrap="nowrap" style="width: 83px; border-right: 1pt solid windowtext; border-bottom: 1pt solid windowtext; border-left: 1pt solid windowtext; border-image: initial; border-top: none;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">50%</span></span></p>
| nowrap="nowrap" style="width: 81px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">50</span></span></p>
| nowrap="nowrap" style="width: 81px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">50%</span></span></p>
| nowrap="nowrap" style="width: 93px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">50</span></span></p>
| nowrap="nowrap" style="width: 93px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">50%</span></span></p>
|- style="height:15.0pt"
|- style="height:15.0pt"
| nowrap="nowrap" style="width: 59px;" width="42" | <p style="padding: 0in 5.4pt; text-align: right;"><span style="height:15.0pt"><span style="color:black">5400</span></span></p>
| nowrap="nowrap" style="width: 59px;" width="42" | <p style="padding: 0in 5.4pt; text-align: right;"><span style="height:15.0pt"><span style="color:black">5400</span></span></p>
| nowrap="nowrap" style="width: 83px; border-right: 1pt solid windowtext; border-bottom: 1pt solid windowtext; border-left: 1pt solid windowtext; border-image: initial; border-top: none;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">45</span></span></p>
| nowrap="nowrap" style="width: 83px; border-right: 1pt solid windowtext; border-bottom: 1pt solid windowtext; border-left: 1pt solid windowtext; border-image: initial; border-top: none;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">45%</span></span></p>
| nowrap="nowrap" style="width: 81px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">45</span></span></p>
| nowrap="nowrap" style="width: 81px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">45%</span></span></p>
| nowrap="nowrap" style="width: 93px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">45</span></span></p>
| nowrap="nowrap" style="width: 93px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">45%</span></span></p>
|- style="height:15.0pt"
|- style="height:15.0pt"
| nowrap="nowrap" style="width: 59px;" width="42" | <p style="padding: 0in 5.4pt; text-align: right;"><span style="height:15.0pt"><span style="color:black">6000</span></span></p>
| nowrap="nowrap" style="width: 59px;" width="42" | <p style="padding: 0in 5.4pt; text-align: right;"><span style="height:15.0pt"><span style="color:black">6000</span></span></p>
| nowrap="nowrap" style="width: 83px; border-right: 1pt solid windowtext; border-bottom: 1pt solid windowtext; border-left: 1pt solid windowtext; border-image: initial; border-top: none;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">40</span></span></p>
| nowrap="nowrap" style="width: 83px; border-right: 1pt solid windowtext; border-bottom: 1pt solid windowtext; border-left: 1pt solid windowtext; border-image: initial; border-top: none;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">40%</span></span></p>
| nowrap="nowrap" style="width: 81px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">40</span></span></p>
| nowrap="nowrap" style="width: 81px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">40%</span></span></p>
| nowrap="nowrap" style="width: 93px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">40</span></span></p>
| nowrap="nowrap" style="width: 93px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">40%</span></span></p>
|- style="height:15.0pt"
|- style="height:15.0pt"
| nowrap="nowrap" style="width: 59px;" width="42" | <p style="padding: 0in 5.4pt; text-align: right;"><span style="height:15.0pt"><span style="color:black">6600</span></span></p>
| nowrap="nowrap" style="width: 59px;" width="42" | <p style="padding: 0in 5.4pt; text-align: right;"><span style="height:15.0pt"><span style="color:black">6600</span></span></p>
| nowrap="nowrap" style="width: 83px; border-right: 1pt solid windowtext; border-bottom: 1pt solid windowtext; border-left: 1pt solid windowtext; border-image: initial; border-top: none;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">38</span></span></p>
| nowrap="nowrap" style="width: 83px; border-right: 1pt solid windowtext; border-bottom: 1pt solid windowtext; border-left: 1pt solid windowtext; border-image: initial; border-top: none;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">38%</span></span></p>
| nowrap="nowrap" style="width: 81px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">38</span></span></p>
| nowrap="nowrap" style="width: 81px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">38%</span></span></p>
| nowrap="nowrap" style="width: 93px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">38</span></span></p>
| nowrap="nowrap" style="width: 93px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">38%</span></span></p>
|- style="height:15.0pt"
|- style="height:15.0pt"
| nowrap="nowrap" style="width: 59px;" width="42" | <p style="padding: 0in 5.4pt; text-align: right;"><span style="height:15.0pt"><span style="color:black">7200</span></span></p>
| nowrap="nowrap" style="width: 59px;" width="42" | <p style="padding: 0in 5.4pt; text-align: right;"><span style="height:15.0pt"><span style="color:black">7200</span></span></p>
| nowrap="nowrap" style="width: 83px; border-right: 1pt solid windowtext; border-bottom: 1pt solid windowtext; border-left: 1pt solid windowtext; border-image: initial; border-top: none;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">35</span></span></p>
| nowrap="nowrap" style="width: 83px; border-right: 1pt solid windowtext; border-bottom: 1pt solid windowtext; border-left: 1pt solid windowtext; border-image: initial; border-top: none;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">35%</span></span></p>
| nowrap="nowrap" style="width: 81px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">35</span></span></p>
| nowrap="nowrap" style="width: 81px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">35%</span></span></p>
| nowrap="nowrap" style="width: 93px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">35</span></span></p>
| nowrap="nowrap" style="width: 93px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" | <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">35%</span></span></p>
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Revision as of 14:29, 16 January 2020

Email from Clay Brown on 1/2/20

See the below table for minimum speed setting for the ZPV variable speed compressors. These minimums are expressed as a percentage of the design RPM used for the vbalance selection. These minimum speeds have been selected to maintain a minimum velocity in the suction lines for better oil return.

We need to make sure that we are setting the minimum speed for ALL ZPV compressors per the table below. The ZPV066 and ZPV096 have a different minimum at 3600 RPM because we are using a smaller suction line size on these models. We also need to make sure that these minimums are properly communicated to the ATC for controls by others projects.


 

   

MINIMUM SPEED (%)

DESIGN RPM

  

ZPV063

ZPV066

ZPV096

3600

68%

50%

50%

4200

58%

58%

58%

4800

50%

50%

50%

5400

45%

45%

45%

6000

40%

40%

40%

6600

38%

38%

38%

7200

35%

35%

35%

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