<div>thanks for the suggestions..</div>
<div>For my model, I am trying to figure out which unit will give me maximum energy savings and which can also be used in real life project. I want to validate the modeling results with actual performance results. and then decide which equipment will I actually install in my room.</div>
<div>Thanks</div>
<div>Regards</div>
<div>Deepika<br></div>
<div class="gmail_quote">On Thu, Nov 4, 2010 at 12:44 PM, <span dir="ltr"><<a href="mailto:Gary.Schrader@buildings.schneider-electric.com">Gary.Schrader@buildings.schneider-electric.com</a>></span> wrote:<br>
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<p class="MsoNormal"><font color="navy" size="2" face="Arial"><span style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt">In addition to Eddie’s comments, I would advise referring to manufacturer’s documentation for heat pump performance. Performance varies by brand, model, capacity, and ambient conditions. I have experience with several heat pumps operating well into the teens. Others claim they can perform well below zero. Capacity charts and performance curves will tell you what the capacity is at various conditions. For the purposes of your model, I would ensure that you are using performance curves reflective of the equipment you intend to install in your room.</span></font></p>
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<p class="MsoNormal"><font color="navy" size="2" face="Arial"><span style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt">-Gary</span></font></p>
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<p><b><font color="navy" size="1" face="Arial"><span style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 8.5pt; FONT-WEIGHT: bold">Gary Schrader</span></font></b><font color="navy" size="1" face="Arial"><span style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 8.5pt"> | </span></font><b><font color="green" size="1" face="Arial"><span style="FONT-FAMILY: Arial; COLOR: green; FONT-SIZE: 8.5pt; FONT-WEIGHT: bold">Schneider Electric </span></font></b><font color="navy" size="1" face="Arial"><span style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 8.5pt">| <b><span style="FONT-WEIGHT: bold">Buildings Business</span></b> | <b><span style="FONT-WEIGHT: bold">Energy Solutions </span></b>| <b><span style="FONT-WEIGHT: bold">Engineer I</span></b><br>
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<p class="MsoNormal"><b><font size="2" face="Tahoma"><span style="FONT-FAMILY: Tahoma; FONT-SIZE: 10pt; FONT-WEIGHT: bold">From:</span></font></b><font size="2" face="Tahoma"><span style="FONT-FAMILY: Tahoma; FONT-SIZE: 10pt"> <a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a> [mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a>] <b><span style="FONT-WEIGHT: bold">On Behalf Of </span></b>Eddie Corwin<br>
<b><span style="FONT-WEIGHT: bold">Sent:</span></b> Thursday, November 04, 2010 2:17 PM<br><b><span style="FONT-WEIGHT: bold">To:</span></b> deepika khowal; <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>
<b><span style="FONT-WEIGHT: bold">Subject:</span></b> Re: [Equest-users] PTAC and PTHP</span></font></p></div>
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<p class="MsoNormal"><span><font size="2" face="Arial"><span style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">A heat pump are a MUCH more efficiency way of heating. The only issue with heat pumps are that they do not work well in cold weather (<40*F) below this temperature, they are pretty much electric resistance heaters. A lot of improvements have been made, for example, the Mitsubishi Citi Multi-Split systems can operate at temperatures as low as 13*F. For these types of systems, they operate as Heat pumps at 40*F and above. At 40*F and below, they use electric resistance heat to warm the air flowing over the outdoor unit (allowing for heat transfer between the air and the refrigerant). So once you get down to 13*F they start to use a lot of electric resistance heating. Still much better that pure electric resistance heating!</span></font></span><font size="2" face="Arial"><span style="FONT-FAMILY: Arial; FONT-SIZE: 10pt"></span></font></p>
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<p class="MsoNormal"><font color="black" size="2" face="Arial"><span style="FONT-FAMILY: Arial; COLOR: black; FONT-SIZE: 10pt">-Eddie</span></font></p></div>
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<p style="MARGIN-BOTTOM: 12pt" class="MsoNormal"><b><font color="black" size="2" face="Tahoma"><span style="FONT-FAMILY: Tahoma; COLOR: black; FONT-SIZE: 10pt; FONT-WEIGHT: bold">From:</span></font></b><font color="black" size="2" face="Tahoma"><span style="FONT-FAMILY: Tahoma; COLOR: black; FONT-SIZE: 10pt"> deepika khowal <<a href="mailto:deepika.khowal@gmail.com" target="_blank">deepika.khowal@gmail.com</a>><br>
<b><span style="FONT-WEIGHT: bold">To:</span></b> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br><b><span style="FONT-WEIGHT: bold">Sent:</span></b> Thu, November 4, 2010 2:52:38 PM<br>
<b><span style="FONT-WEIGHT: bold">Subject:</span></b> [Equest-users] PTAC and PTHP</span></font><font color="black"><span style="COLOR: black"></span></font></p>
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<p class="MsoNormal"><font color="black" size="3" face="Times New Roman"><span style="COLOR: black; FONT-SIZE: 12pt">HI </span></font></p></div>
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<p class="MsoNormal"><font color="black" size="3" face="Times New Roman"><span style="COLOR: black; FONT-SIZE: 12pt">I am trying to model a room with 80% glazing which has a wall unit air conditioner.</span></font></p></div>
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<p class="MsoNormal"><font color="black" size="3" face="Times New Roman"><span style="COLOR: black; FONT-SIZE: 12pt">what will be the difference PTAC using electric heat / heat pump for heating ?</span></font></p></div>
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<p class="MsoNormal"><font color="black" size="3" face="Times New Roman"><span style="COLOR: black; FONT-SIZE: 12pt">which one is advisable in terms of efficiency and energy savings?</span></font></p></div>
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<p class="MsoNormal"><font color="black" size="3" face="Times New Roman"><span style="COLOR: black; FONT-SIZE: 12pt">does anyone has any thought on this?</span></font></p></div>
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<p class="MsoNormal"><font color="black" size="3" face="Times New Roman"><span style="COLOR: black; FONT-SIZE: 12pt">Thanks</span></font></p></div>
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<p class="MsoNormal"><font color="black" size="3" face="Times New Roman"><span style="COLOR: black; FONT-SIZE: 12pt">Regards</span></font></p></div>
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<p class="MsoNormal"><font color="black" size="3" face="Times New Roman"><span style="COLOR: black; FONT-SIZE: 12pt">Deepika</span></font></p></div></div></div></div></div></div></div></div><br>______________________________________________________________________<br>
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