Enhancing the Healing Environment with Geothermal Energy - Sherman Hospital
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Enhancing the Healing Environment with Geothermal Energy
Sherman Hospital – case study
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Sherman Replacement Hospital The Project
• Originally opened in 1888 – 4 beds and 1 OR• Many additions between 1895 and 1999• Increased population requires further expansion• Existing 13 acre site – “tapped out”• Purchased new ground at Randall / Big Timber• Plans begin for replacement facility
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Sherman Replacement Hospital The Criteria
• Modern expandable facility• Attraction of a healing environment• Sustainability a primary focus• Patient comfort and safety a priority• Control the rising cost of operation
Energy & Water
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Sherman Replacement Hospital Why Geothermal
• Visited Great River Medical Center as a model• Required storm water detention• Met the requirements of resource conservation• Healing environment enhanced with large lake
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Geothermal +/-
• Uses less energy• Uses fewer natural resources• Reduces operating costs• No cooling towers / chemicals• Increased marketing potential• Therapeutic value
• “Buy in” and training• Added first cost for lake or wells• Requires extra acreage• Maintenance of heat pumps• Shorter equipment life
Pros Cons
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Hospital Energy UsageHospitals among most complex and energy intensive facilities.
Hospitals spend $5 billion annually on energy.
Represents 1% - 3% of typical hospital’s operating budget or an estimated 15% of profits.
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Sherman Stats
• 650,000 SF greenfield campus
• Opened late 2009• Planned to build 5-acre lake,
extra 10 acres required for total 15-acre lake
• $400,000 grant from Illinois Clean Energy Community Foundation
• $1,000,000 grant from DOE
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Sherman Geothermal• 15 acre, 18’ deep lake provides 2400 tons of cooling
• Can expand to 3400 tons in future within lake footprint
• 175 heat exchangers (150 miles of piping) at bottom of lake
• 750 water-to-air heat pumps for comfort cooling
• 50 water-to-water heat pumps for infrastructure
• Water level maintained with two wells
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Energy Efficient Design Concepts
• Intelligent Lighting systems from occupancy sensors to time zones.
• Building automation, programmable thermostats
• No Cooling towers (all condenser water returns to closed loop lake)
• Water = low flow faucets, shower heads, toilets.
• Tankless water heaters
• Windows = low “E” glass• Recycling programs include: cardboard, plastic, glass, paper & metals, lamps, batteries, oil, (fryer and motor)
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Sherman Geothermal• Lake serves multiple purposes
thermal source therapeutic healing environment storm water retention
• Excavated fill used to raise building 5’ for greater presence
• Irrigation system uses water from lake rather than city
• Manifold Room educates public about renewable energy
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Sherman Financial Analysis
Existing Facility Energy Costs 2009• Electric/Gas/Water $3,567,682• $/ Ft 2 $ 5.91
Estimated New Facility Energy - Conventional• $5.91/Ft2 x .90% Eff. Gain = $5.32/Ft2
• Electric/Natural Gas/Water $3,434,000 or $5.32/Ft2
Project Goal for New Facility Energy Costs 2010• Electric/Natural Gas/Water $2,650,000 or $4.10/Ft2
Actual New Facility Energy Costs 2010*
• Electric/Natural Gas/Water cNatural G $2,184,130 or $3.38/Ft2
• Extrapolated for incomplete (11 Months) 1st year
*
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Sherman Energy Analysis
Existing Facility
2009 – Fully Occupied 350,260 BTU / Ft2 / YR
2010 – Partially Occupied 225,760 BTU / Ft2 / YR
New Facility2010 – Fully Occupied 164,200 BTU / Ft2 / YR
*
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Sherman Water Consumption
Existing Facility
2009 – Fully Occupied 85.38 GAL / Ft2 / YR
2010 – Partially Occupied 35.48 GAL / Ft2 / YR
New Facility2010 – Fully Occupied 18.88 GAL / Ft2 / YR
*
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Sherman Lake Construction
5/07 9/07 4/08
9/08
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Sherman Manifold Room
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Sherman Heat Exchanger Construction
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Sherman Pipe Placement
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Sherman’s New Hospital