Sustainable Land Development Today - September 2008 - (Page 13)

Looking for 3D design software? system will prevent any direct interaction between the fluid and the earth, but will still allow heat to transfer across the pipe. At no time during or after the installation of the system will water be discharged to or withdrawn from the ground or the nearby Charles River. The only net discharge from the wells will be heat, which in this system will be run through a closed-loop cooling tower so the annual thermal discharge to the ground will remain zero. One of the major challenges posed by the construction of the geothermal system was the timing of the well drilling around the excavation and foundation work on the buildings. Working closely with the project’s general contractor, Suffolk Construction, NewBridge designers developed a phased schedule that enabled the wells to be drilled without interfering with the foundation work. The most critical component of the geothermal system is the heat pump itself, which is the unit that transfers heat from one reservoir to another. The heat pump will extract heat energy from the circulating water and make it available for heating or cooling purposes by increasing or decreasing the absolute temperature with respect to that of the energy source. As the temperature range of the water in the system remains constant throughout the year, the heat pump will concentrate the differential energy between the heat source and the pump and make it available for heating or cooling purposes. In the summer, the heat pump will extract heat from the conditioned space and send it down into the earth loop to warm the relatively cool ground. In the winter, this process is reversed, as the heat pump extracts heat from the relatively warm ground and pumps this heat into the conditioned space. The overall efficiency of NewBridge’s system is derived from the pump’s ability to transfer heat rather than produce it. By extracting more than two thirds of its energy from the earth and moving it to the heat-pump unit, the geothermal heating and cooling system will generate approxi- Move over to Carlson! You’ You’ll get increased productivity and the ability to create better designs with Carlson’s line-up of Carlson’ land development software solutions for 2009. Create your civil engineering designs in 3D from scratch. Design fully in 3D for both surface and subgrade. Transform 2D designs to 3D for construction estimation and machine control. Learn more about the better software choice for your design projects. Call Carlson now – “It’s what civil engineering software should be.” It’ be.” 800-989-5028 www.carlsonsw.com The Carlson Civil Suite: Civil • Survey • Hydrology • GIS — Plus Carlson Takeoff & More Authorized Developer Authorized IntelliCAD Technology Consortium Member ® ® Works Simply Simply Works © Copyright 2008 Carlson Software, Inc. All rights reserved. Carlson Software is a registered trademark of Carlson Software, Inc. All other product names or trademarks belong to their respective holders. Circle 130 • or www.SLDTonline.com/webcard www.SLDTonline.com 13 http://www.carlsonsw.com http://www.carlsonsw.com http://www.SLDTonline.com/webcard http://www.SLDTonline.com

Table of Contents Feed for the Digital Edition of Sustainable Land Development Today - September 2008

Sustainable Land Development Today - September 2008 Contents Our Voice The Bottomline Editorial Board SLDT Resources Digging Deep Oases of Capital Build a Better Business on an Interactive, Virtual Landscape Regulation SLDI in Focus �� SLDI Sponsored Summit �� Workshops �� Bookstore Tee’d Up for Sustainability Retention Solutions Wastewater Redevelopment Industry News Marketplace Products/Services Showcase Advertiser Index The Last Word

Sustainable Land Development Today - September 2008

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