Good Afternoon, 

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?

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)

I'm also getting some warnings that I'm not sure how to resolve: 

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)        

Note: I am using the system sizing that the geothermal engineer forwarded

2. WLHP alarm limits

GSHP Plant Equipment

WS 1 of 2

Water Loop Properties

GSHP Loop: Head: 51 (This is lower, but the lowest equest allows is 51)              Design DT: 10 F (a)

Pump Config: Single Loop Pump(s) only           Loop Pumps-- Number: 2

Loop Flow: Variable                                                   Head/Flow: 23 ft          50gpm

Operation: Demand                  Setpoint: Fixed                  Motor Efficiency: Premium

Loop Temp                       Min: 33F            Max: 75F                           Pump Control: Two Speed

WS 2 of 2

Ground Loop Heat Exchanger Properties

GHX Type: Vertical Well Field            Pipe Size: 1 ½”             Rating: Specify

                                                               Inner: 1.325”                  Outer: 1.9”

Configuration: Line of 4                                             U-Tube Leg Separation: 1”

Num of Identical Well Fields: 1                          GHX Pipe Head: 30 ft

Depth: 500 ft  Spacing: 20 ft                Fluid Properties:

Borehole Diameter: 6”                                        Fluid: Methanol

Pipe Material: Polyethylene                               Antifreeze Concern: 12%

Soil Thermal Properties and History

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