I am modeling a 46,200 hotel with a geothermal well heat
pump system in the detailed interface of eQUEST and am running into a few
problems. I am fairly new to the program so please forgive my ignorance. I
searched the previous threads and could not find any solutions and would highly
appreciate any assistance.
- For heating only zones, there will be electric unit
heaters installed. ASHRAE Std. 90.1-2004 states “Where no cooling
system exists or no cooling system has been specified, the cooling system
shall be identical to the system modeled in the baseline design.”
For such spaces I have specified a packaged single zone unit. Specifying
electric heat and a water cooled condenser connected to the GSHP Loop. Is
this the correct approach?
- When I go to perform a simulation I am prompted with “PUMPd
Error: PUMP design input is unreasonable Check values.” The GSHP
system has (2) pumps and I have input their specifications per design. Does
anyone have any suggestions? Could this be due to the electric unit
heaters being modeled with cooling, thus increasing GPM?
- I am also having trouble with my DHW Loop Pumps. I receive
an error stating: “Pump: DHW Loop Pumps has user specified
parameters that force the mechanical efficiency to be unreasonable. Check
input or allow the program to calculate the kW. Calculated mechanical
efficiency= 0.071.” Once again I have entered the pumps’
specifications per design documents.
Thank you,
Keith Lane, LEED AP
Mechanical Engineer
Garcia.Galuska.DeSousa
Consulting
Engineers
Inc.
370 Faunce
Corner Road, Dartmouth, MA 02747
p.508.998.5700
f. 508.998.0883