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Good Afternoon eQuest users, </div>
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I am looking for some help with an equest modeling problem as someone very new to both equest and with just basic understanding of geothermal systems. I was hoping this community could help. </div>
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I am trying to model a proposed geothermal system, however the end annual kWh usage in eQuest comes out to be around 25% of the quoted annual kWh usage from the engineer. What am I missing?</div>
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This is a building with 4 HVAC zones, each will be served by a waterfurnace system, and there is a ground loop with 2 pumps. The GSHP specs are directly from the geothermal engineer (below and also attached)</div>
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I'm also getting some warnings that I'm not sure how to resolve: </div>
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1. for each of the 4 systems, " A HEATING-CAPACITY of -29600. is inconsistent with a COOLING-CAPACITY of 38400. in SYSTEM EL1 Sys1 (PVVT) (G.SSE1) </div>
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Note: I am using the system sizing that the geothermal engineer forwarded</div>
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2. WLHP alarm limits</div>
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GSHP Plant Equipment</div>
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<span style="font-weight: 300;">WS 1 of 2</span></div>
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Water Loop Properties</div>
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GSHP Loop: Head: 51</div>
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(This is lower, but the lowest equest allows is 51) Design DT: 10 F (a)</div>
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Pump Config: Single Loop Pump(s) only Loop Pumps-- Number: 2</div>
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Loop Flow: Variable Head/Flow: 23 ft 50gpm</div>
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Operation: Demand Setpoint: Fixed Motor Efficiency: Premium</div>
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Loop Temp Min: 33F Max: 75F Pump Control: Two Speed</div>
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<span style="font-weight: 300;">WS 2 of 2</span></div>
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Ground Loop Heat Exchanger Properties</div>
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GHX Type: Vertical Well Field Pipe Size: 1 ½” Rating: Specify</div>
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Inner: 1.325” Outer: 1.9”</div>
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Configuration: Line of 4</div>
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U-Tube Leg Separation: 1”</div>
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Num of Identical Well Fields: 1 GHX Pipe Head: 30 ft</div>
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Depth: 500 ft Spacing: 20 ft Fluid Properties:</div>
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Borehole Diameter: 6” Fluid: Methanol</div>
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Pipe Material: Polyethylene Antifreeze Concern: 12%</div>
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Soil Thermal Properties and History</div>
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All settings left to default</div>
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<a href="https://energy-models.com/sites/all/files/forum_topic_field_image_cache/geotherm_properties.PNG" id="OWA962bc0ec-df17-f9fd-3dc0-56811e2e6776" class="imagefield-fancybox OWAAutoLink" rel="imagefield-fancybox-188460-field_image_cache" style="color: rgb(0, 119, 204); margin: 0px;"><u><img width="595" height="138" style="width: 595px; height: 138px; margin: 0px; box-sizing: border-box;" src="https://energy-models.com/sites/all/files/imagecache/595/forum_topic_field_image_cache/geotherm_properties.PNG"></u></a></div>
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