Page 368 - Sustainable On-Site CHP Systems Design, Construction, and Operations

Fort Bragg CHP 341

Turbine Absorption Chiller Net Monthly IES
Runtime (h) Runtime (h) System Efficiency (%)
September 338 — 65.4
October 635 — 63.0
2004
November 513 — 72.0
December 445 — 67.2
January 730 — 72.0
February 668 — 74.1
March 688 — 80.2
April 702 — 74.2
2005
May 672 404 67.9
June 651 648 76.0
July 695 693 77.2
August 735 705 73.7

TABLE 20-2 Operational Results, September 2004 through August 2005

Fall 2004 Winter 2005 Summer 2005
Turbine fuel oil 3,029 120 —
Input energy Turbine gas 111,934 169,347 155,605
(MMBtu) Duct burner gas — 9,168 —
Total input 114,963 178,635 155,605
Unrecovered 37,511 43,131 43,702
turbine energy
HRSG steam 44,126 86,064 52,057
Output energy Net turbine 32,647 48,434 43,073
(MMBtu) electric
Net absorption — — 19,521
chiller cooling
Total output 114,284 177,629 158,353
Net IES 66.8% 75.3% 73.6%
efficiency

TABLE 20-3 Energy Utilization Result