VIEWS: 7 PAGES: 4 POSTED ON: 10/14/2011
REBUILDING IT BETTER: GREENSBURG, KANSAS On May 4, 2007, a massive tornado destroyed or severely damaged 95% of Greensburg, Kansas. Since then, city and community leaders have been committed to rebuilding the town as a model sustainable rural community. The new hospital in Experts from the U.S. Department of Energy (DOE) and the National Greensburg is projected Renewable Energy Laboratory (NREL) are working with city leaders, business owners, and residents to identify ways to incorporate to achieve more than energy efficiency and renewable energy technologies into the new 40% energy savings buildings. Ultimately, these technologies could be replicated in other when compared to communities recovering from disaster. a hospital built to standard code thanks Kiowa County Memorial Hospital The original Kiowa County Hospital was destroyed in the tornado and rebuilt to features such as an green. In fact, the hospital’s design team took one of the most energy-intensive on-site wind turbine. building types and designed a first-of-its kind energy-efficient hospital, while still meeting functional and safety requirements. The 50,000 square-foot building includes 15 acute-care beds, rural health and specialty clinics, an emergency department with two trauma rooms, physical/occu- pational therapy and radiology departments, a laboratory, and other support areas. 100% Renewable Energy, 100% of the Time The Greensburg Wind Farm consists of 10 1.25 megawatt (MW) wind turbines that supply 12.5 MW of renewable power to the town. That’s enough energy to power every house, business, and municipal building in Greensburg. The town will use only about 1/4 to 1/3 of the power generated to reach its “100% renewable energy, 100% of the time” goal. Excess power will be placed back on High performance windows increase The building features tile that is manufactured the grid and offered as renewable natural light, decreasing electricity costs. regionally and made from recycled content. energy credits for other Kansas Power Pool and NativeEnergy customers. LEED® Platinum efficiency measures, including lighting; The wind farm was completed in Completed in March 2010, the Kiowa insulation; heating, ventilation, and air the spring of 2010. John Deere County Memorial Hospital is built conditioning (HVAC); and renewable Renewable Energy built the wind to achieve the U.S. Green Building power sources. farm and maintains the project. It Council’s Leadership in Energy and was funded by the U.S. Department Lighting Environmental Design (LEED®) of Agriculture Rural Development. Platinum designation. If awarded, the • Highly efficient T5 fluorescent hospital will be the first critical access and compact fluorescent luminaries hospital in the nation to achieve the maximize energy efficiency without LEED Platinum rating. sacrificing visual comfort or patient care NREL, with the support of DOE, provided technical assistance to de- • LED sources for accent lighting, termine the most cost-effective energy exterior walkways, and parking efficiency strategies. Many of the effi- lot lighting provide energy-efficient ciency measures included in the Kiowa illumination County Memorial Hospital have been incorporated into the Advanced Energy • Light-sensing dimmers and motion Design Guide for Small Hospitals sensors minimize artificial light use and Healthcare Facilities, an energy efficiency guide developed by DOE/ • Daylighting in common spaces, NREL in collaboration with national corridors, patient rooms, and professional societies. administration areas illuminates 75% of the interior Energy Conservation • High performance, low-E, double- In order to reach their LEED Platinum glazed windows allow natural light certification goal, the hospital design to offset electrical lighting team had to consider and implement numerous energy conservation and ‘‘ The tornado not only destroyed our community and hospital—it caused a major shift in how we make decisions. In rebuilding, we learned not to look at the initial cost only, but to look at ’’ environmental impact, long term cost savings, and sustainable and renewable resources. Mary Sweet, Administrator Kiowa County Memorial Hospital Daylighting in corridors illuminates 75% of the hospital’s interior. Building Envelope and Insulation Sustainable Features throughout the hospital and col- • R-25 sprayed polyurethane foam The new hospital includes numerous lected rainwater is used to flush toilets. on precast panels and interlocking sustainable features to help reduce Collected rainwater also provided metal studs provides a continuous overall water use by 57%. Additionally, initial landscape irrigation. thermal break the features provide the site with a Materials healthy indoor and outdoor environ- • Spray-sealed joints on top, bottom, ment for the hospital’s employees, Hospital design team members set a and between panels provides a vapor patients, and visitors. goal to use recycled materials for 30% and air barrier of the building’s materials. Interior Sustainable Site finishes, including tile and recycled HVAC rubber floors, help to meet this goal. The integrated building design of the • Ultra high-efficiency magnetic hospital provides quality views from bearing chiller with secondary unit Air Quality and Indoor Environment all patient rooms, while walking paths reclaims waste heat for reheat and incorporated into the healing garden With the majority of patients, visi- domestic water heating and patio microclimate promote the tors, and staff inside the hospital, an healing strategies of the hospital. environment that is safe, sanitary, and • Ventilation air is pre-conditioned via comfortable is imperative. To create Patients and visitors can walk the paths energy recovery wheels, reducing the this environment, the hospital utilizes and, through built-in signage, learn load on heating and cooling systems a ventilation system that prevents air what LEED certification is and how the hospital plans to achieve it. Light exchange between emergency and isola- • Variable air volume system provides tion areas and the rest of hospital, and air distribution and dynamically colors are used on the building’s roof and paved areas to reduce the ground demand-control ventilation to ensure adjusts air flow to meet loads while continuous fresh air and appropriate maintaining pressurization heat-island effect. carbon dioxide levels. Since Kansas Water Efficiency weather can become very humid, a rain Wind Power screen system on the hospital’s exterior • On-site, grid-tied, 50 kilowatt (kW) The hospital has reduced waste water by 50% thanks to an on-site bioswale provides moisture control. The hospital wind turbine generates 220,000 uses a filmless x-ray, which eliminates kWh annually to partially off-set the filtration system that removes impuri- ties from excess rainwater and facility the need for dangerous chemicals, and hospital’s energy use seamless countertops and floors to help gray water (laundry, showers, and lavatories). Low-flow fixtures are used reduce infection rates. An on-site filtration system helps reduce wastewater by 50%. Results According to energy analysis modeling results, the new hospital is 32% more energy efficient than an ASHRAE-compliant building of the same size and shape. Applying the savings from the 50 kW wind generator, the hospital achieves an additional 8% in annual electrical savings for a total savings of approximately 40%. Thanks to the high-efficiency HVAC and heat recovery system, the efficient build- ing envelope, and the City of Greensburg’s 12.5 MW wind farm helping to provide power, the hospital was able to eliminate the need for an expensive boiler backup system, as well as the gas service, piping, and equipment flues associated with natu- ral gas fired heating equipment. These savings offset the cost of the heat recovery system and high-efficiency equipment and make the hospital an electricity-only site. Annual Energy Cost Savings $350,000 Laundry Kitchen Service Water Heating Elevators $280,000 Plug Loads Fans/Pumps Lighting Cooling $210,000 Heating Wind Energy Design Team Owners: $140,000 Kiowa County Construction Manager: Murray Company $70,000 Architect: Health Facilities Group, LLC Mechanical and Plumbing Engineering: Midwest Engineering, Inc. 0 Electrical Engineering: Standard Kiowa County Professional Engineering Consultants Energy Code Memorial Hospital Civil Engineering and Landscape: MKEC Engineering Consultants, Inc. Energy modeling indicates that annual energy costs for a building similar to Kiowa County Memorial Hospital built to standard code (the left column) would be approximately Energy Modeling: $308,700. The right column represents the expected annual energy costs for Kiowa County Midwest Engineering, Inc. Memorial Hospital. Thanks to the Greensburg Wind Farm, on-site wind turbine, and other Chapek Engineering energy efficiency measures, the hospital’s total annual energy costs are expected to be Commissioning: approximately $186,100—a reduction of more than 40%. Midwest Engineering, Inc. Cover photo credit: Catherine Hart, Greensburg GreenTown/PIX 17013. Pages 2–4: Joah Bussert, Greensburg GreenTown/PIX 17015, 17042, 17040, 17041, and 17043. For additional information please contact: This document is one in a series of documents outlining the options for and benefits of rebuilding green after a disaster. The series EERE Information Center draws on lessons learned by teams from the U.S. Department of 1-877-EERE-INF (1-877-337-3463) Energy and its National Renewable Energy Laboratory as they www.eere.energy.gov/informationcenter helped the townspeople of Greensburg, Kansas, rebuild green after a Prepared by the National Renewable Energy Laboratory (NREL) devastating tornado. To see the other documents in this series, visit NREL is a national laboratory of the U.S. Department of Energy www.buildings.energy.gov/greensburg/. Office of Energy Efficiency and Renewable Energy DOE/GO-102010-2993 • Revised August 2010 Operated by the Alliance for Sustainable Energy, LLC Printed with a renewable-source ink on paper containing at least 50% wastepaper, including 10% post consumer waste.
Pages to are hidden for
"Rebuilding it Better Greensburg Kansas Kiowa County Memorial"Please download to view full document