pre-design phase schematic design phase construction documents phase design development phase construction phase occupancy phase
West Bend A Mutual Insurance Company: The Silver Lining

CASE STUDY: WEST BEND MUTUAL INSURANCE COMPANY
————————  2005  ———————— ————————  2006  ———————— ————————  2007  ———————— ————————  2008  ————————
JAN—MAR   APR—JUN   JUL—SEP   OCT—DEC JAN—MAR   APR—JUN   JUL—SEP   OCT—DEC JAN—MAR   APR—JUN   JUL—SEP   OCT—DEC JAN—MAR   APR—JUN   JUL—SEP   OCT—DEC


energy measures


WEST BEND'S ADOPTED ENERGY EFFICIENCY MEASURES

Windows:
Improve shading coefficient from average SC=0.46 to area-weighted average SC = 0.26

Lighting efficiency:

  • Auditorium & Lobby 1.5 - 1.68W/ft2
  • Main Dining 1.8 - 1.34W/ft2
  • Workout Area 1.4 - 1.16W/ft2
  • Dock & Mail 1.8 - 1.41W/ft2
  • 2nd & 3rd floor office 1.4 - 1.05W/ft2
  • Training & Training Dining 2.7 - 1.6W/ft2
  • Kitchen & Serving 2.0 - 2.02W/ft2

Reduce kitchen hood exhaust using UV:
29,475 cfm basline to 19,750 cfm proposed; 33hp exhaust fan baseline to 17hp proposed

High efficiency hydronic boilers:
Improve seasonal efficiency from 80% to 90% using full modulating boilers

TP-1 transformers

Chiller plant efficiency:

  • Baseline plant is two 450 ton centrifugal chillers, 0.64 kW/ton, in parallel; constant flow primary/variable secondary, 2-speed cooling tower fan.
  • Proposed plant is two 450 ton centrifugal vfd chillers in series, upstream chiller kW/ton=0.531, downstream=0.556; variable primary pumping; low-flow condenser; Variable Speed Drive (VFD) cooling tower fan.