HomeMy WebLinkAboutCity of Nunam Iqua Heat Recovery Project Feasibility Analysis - Sep 2013 - REF Grant 7071052ANTHC DEHE
Alaska Native Tribal Health Consortium
Project Name: Nunam Iqua Heat Recovery Project
Project Number: TBD
Engineer: WLF
Revision Date: 09-Sep-13
Print: 10-Sep-13
Checked:
Find: Feasibility of Heat Recovery from Nunam Iqua Generator Facility to existing Utility Buildings
Given:
Assumptions:
Calculations:
Monthly KWH produced by existing Nunam Iqua generator plant in 2012
Heating Degree Days for Emmonak
3300 BTU to radiators KW Power Generated (From Kris Noonan @AIDEA)
Energy Audits of Water Plant, Clinic and Tribal Office
Estimated peak heat loss for Tribal Office
Estimated Peak heat loss for Clinic Bldg
Estimated Peak heat loss for Trading Post
Design Air Temperature:
Design Water Temperature
Design Glycol Heat Trace Temperature
Occupied Building Space temperature
Cllnlc Building Heat Loss:
Building design heating loss:
Heat loss/ degree of OSA temp
!Tribal Office Building Heat Loss:
Building design heating loss:
Heat loss/ degree of OSA temp
!Trading Post Heat Loss:
Building design heating loss:
Heat loss/ degree of OSA temp
Above Ground Heat Recovery Pipe Heat Loss:
Design Heat Recovery loop Temperature
Design Air Temperature:
Insulation:
Pipe:
51,000 BTU/Hr
40,000 BTU/Hr
80,000 BTU/Hr
180 Degrees F
-40 Degrees F
-40 Deg F
40 Deg F
75 Deg F
72 Deg F
4.5 Inch foam ins.
3.25 Pipe OD (Inches)
40,000 BTU/H
357.1 BTH/H* Deg F
51,000 BTU/H
455.4 BTH�F
80,000 BTU/H
714.3 BTH/H* Deg F
Insulation K value
R value=
0.16 BTU x in/ (ft'2 x hr x Deg F)
15.839 Ft'2 x hr x Deg F
Length of Above ground Pipe
Design Heat Loss:
Heat Loss/ Degree OSA temp
2500 Ft
29,545 BTU/hr
11.82 BTU H/ft
134.3
Division of Environmental Health Engineering
1901 Bragaw Street, Suite 200
ANCHORAGE, AK 99503
(907) 729-3609
FAX (907) 729-3729
e-mail: william.fraser@anthc.org
Estimated energy use for washeteria based on ANTHC-DEHE Energy Audit (2012)
Estimated energy use for Tribal office and Clinic building based on ANTHC-DEHE Energy Audit (2012)
Estimated Burner AFU E: 82%
Clinic & Store Estimated Fuel Price: $4.38 per gal
Utility Heat Sales Agreement: 0% Avoided fuel cost
Frozen Soil Conductivity 0.12 (Between 0.05 & 0.15 BTU H/Ft)
Above Ground Heat Recovery System in Arctic Pipe
Generator Module Heat Loads
design conditions was assumed based on small footprint buildings with poor insulation and high
infiltration. Design conditions were based on OSA temp of -50F
Living quarters design heat loss
Control module Heat Loss
Storage modules Heat Loss
Generator Modules Heat Loss
Heat loss/ degree of OSA temp:
Parasitic Generator Cooling System Losses
Design Air Temperature:
AMOT valve leak Rate (average)
Hot CoolantTemperature
Design Heat Loss:
Heat loss/ Degree of OSA temp:
Total
0 BTU/Hr
10000 BTU/Hr
0 BTU/Hr
0 BTU/Hr
10000 BTU/Hr
91 BTU/Hr* deg F
-40 Deg F
0.5 GPM
180 Deg F
49500 BTU/Hr
225.0
050100150200250300350400450500January February March April May June July Aug Sept Oct Nov DecMBTU/HRMONTHNunam Iqua Recovered Heat UtilizationWasheteria Heating DemandTrading Post Htg Demand (MBH)Tribal Office Bldg Htg Demand (MBH)Clinic Bldg Heating Demand (MBH)Available Recovered Heat