Engineering Green Buildings http://hpac.com/taxonomy/term/13661/more en Holding to Specifications: The HVAC Engineer's Responsibility http://hpac.com/engineering-green-buildings/holding-specifications-hvac-engineers-responsibility <div class="field-byline"> By KENNETH M. ELOVITZ, PE, Esq.; Energy Economics Inc.; Foxboro, Mass. </div> <div class="field-deck"> Contrary to popular belief, submittal review is not a time to revisit design decisions </div> <div class="node-body article-body">Contractors frequently ask engineers to approve submittals for equipment differing from the equipment in the engineers’ bases of design. When reviewing submittals, however, the engineer’s job is not to ask whether the submitted product is a good way to do the job or has advantageous features. It is to determine whether the submitted product meets the specified requirements.</div> <div class="og_rss_groups"></div><p><a href="http://hpac.com/engineering-green-buildings/holding-specifications-hvac-engineers-responsibility" target="_blank">read more</a></p> http://hpac.com/engineering-green-buildings/holding-specifications-hvac-engineers-responsibility#comments Engineering Green Buildings Mon, 04 Aug 2014 15:11:00 +0000 13601 at http://hpac.com NEMA Standards Are Giving Motor Bearings the Shaft http://hpac.com/motors-drives/nema-standards-are-giving-motor-bearings-shaft <div class="field-byline"> By ADAM WILLWERTH, Electro Static Technology, Mechanic Falls, Maine </div> <div class="field-deck"> Protection against electrical discharges needed to sustain savings from VFD use </div> <div class="node-body article-body">A variable-frequency drive can induce unwanted voltages and currents on a motor’s shaft, destroying the motor’s bearings. Although current National Electrical Manufacturers Association standards highlight the possible need for extra bearing protection for inverter-driven motors, the language often is not specific enough to guide motor manufacturers and has not been updated to include new research results and technology developments.</div> <div class="og_rss_groups"></div><p><a href="http://hpac.com/motors-drives/nema-standards-are-giving-motor-bearings-shaft" target="_blank">read more</a></p> http://hpac.com/motors-drives/nema-standards-are-giving-motor-bearings-shaft#comments Engineering Green Buildings Motors / Drives Mon, 05 Aug 2013 15:12:00 +0000 9731 at http://hpac.com Air Infiltration http://hpac.com/engineering-green-buildings/air-infiltration <div class="field-byline"> By NATE GILLETTE, AIA, LEED AP, CEM; Energy Finance Analytics LLC; Grand Rapids, Mich. </div> <div class="field-deck"> Standards—and architects’ and engineers’ responsibilities—are changing </div> <div class="node-body article-body">Air infiltration long has been a little-understood or even ignored factor when it comes to energy efficiency in commercial buildings. Engineers understand it exists, but tolerate its existence by simply accounting for it in heating- and cooling-system design. </div> <div class="og_rss_groups"></div><p><a href="http://hpac.com/engineering-green-buildings/air-infiltration" target="_blank">read more</a></p> http://hpac.com/engineering-green-buildings/air-infiltration#comments Air Conditioning Engineering Green Buildings Heating IAQ & Ventilation Silver Wed, 27 Mar 2013 18:47:00 +0000 8171 at http://hpac.com Commissioning Uncovers Opportunity for Energy Savings http://hpac.com/engineering-green-buildings/commissioning-uncovers-opportunity-energy-savings <div class="field-byline"> By KEVIN KOSS, PE, LEED AP; ACS; Madison, WIS. </div> <div class="field-deck"> Seek out artificial inefficiencies in HVAC systems, and it is likely you will find them </div> <div class="node-body article-body">Building commissioning agents owe their clients the attention required to fine-tune their heating, air conditioning, and ventilation systems. </div> <div class="og_rss_groups"></div><p><a href="http://hpac.com/engineering-green-buildings/commissioning-uncovers-opportunity-energy-savings" target="_blank">read more</a></p> http://hpac.com/engineering-green-buildings/commissioning-uncovers-opportunity-energy-savings#comments Air Conditioning Building Controls Engineering Green Buildings Heating IAQ & Ventilation Mon, 04 Mar 2013 19:37:00 +0000 7701 at http://hpac.com Integrated Project Delivery: A Return to Teamwork http://hpac.com/engineering-green-buildings/integrated-project-delivery-return-teamwork <div class="field-deck"> Spreading risk and reward among all project stakeholders and achieving real results </div> <div class="node-body article-body">Spreading risk and reward among all project stakeholders and achieving real results</div> <div class="og_rss_groups"></div><p><a href="http://hpac.com/engineering-green-buildings/integrated-project-delivery-return-teamwork" target="_blank">read more</a></p> http://hpac.com/engineering-green-buildings/integrated-project-delivery-return-teamwork#comments Engineering Green Buildings Fri, 07 Dec 2012 15:37:00 +0000 5869 at http://hpac.com Shutterstock Images Leveling the Playing Field of Green Products http://hpac.com/archive/leveling-playing-field-green-products <div class="field-deck"> Ensuring innovative, but underfunded, new technologies get noticed&#8212;and used </div> <div class="node-body article-body">In a 2010 survey of chief executive officers worldwide, 93 percent of respondents cited sustainability as critical to the future success of their companies, with 91 percent saying their companies would employ new technologies, such as renewable energy and energy efficiency, to address sustainability issues in the ensuing five years. That is the good news. The bad news is that many promising new products and technologies are having a difficult time making it onto the radar of specifiers and purchasers.</div> <div class="og_rss_groups"></div><p><a href="http://hpac.com/archive/leveling-playing-field-green-products" target="_blank">read more</a></p> http://hpac.com/archive/leveling-playing-field-green-products#comments Engineering Green Buildings Archive Sat, 01 Sep 2012 16:00:00 +0000 4441 at http://hpac.com Achieving Net Zero Requires Innovative Thinking http://hpac.com/archive/achieving-net-zero-requires-innovative-thinking <div class="field-byline"> MARK S. LENTZ, PE, LENTZ ENGINEERING ASSOCIATES, SHEBOYGAN FALLS, WIS. </div> <div class="field-deck"> <p>The days of discouraging 'high-risk' behavior by system designers must end</p> </div> <div class="node-body article-body">If a building owner has enough money for renewable-energy systems and the space to install them, any designer can achieve net-zero performance. Achieving net-zero performance economically, however, is a different matter.</div> <div class="og_rss_groups"></div><p><a href="http://hpac.com/archive/achieving-net-zero-requires-innovative-thinking" target="_blank">read more</a></p> http://hpac.com/archive/achieving-net-zero-requires-innovative-thinking#comments Engineering Green Buildings Archive hpac.com/columns hpac.com/green Mark Lentz net-zero performance Thu, 01 Sep 2011 04:00:00 +0000 3442 at http://hpac.com A New Path to High-Performance Buildings http://hpac.com/archive/new-path-high-performance-buildings <div class="field-byline"> By DENNIS STANKE; Trane; La Crosse, Wis. </div> <div class="field-deck"> ASHRAE Standard 189.1 offers guidance in code language </div> <div class="node-body article-body">When a team prepares to design a sustainable or high-performance building, the designers usually seek to comply with a rating system such as the U.S. Green Building Council’s (USGBC’s) Leadership in Energy and Environmental Design (LEED) or Green Globes. Now, there is a third option available to designers: meeting the criteria spelled out in ANSI/ASHRAE/USGBC/IES Standard 189.1, Standard for the Design of High Performance Green Buildings Except Low-Rise Residential Buildings.</div> <div class="og_rss_groups"></div><p><a href="http://hpac.com/archive/new-path-high-performance-buildings" target="_blank">read more</a></p> http://hpac.com/archive/new-path-high-performance-buildings#comments Engineering Green Buildings Archive Fri, 01 Jul 2011 16:00:00 +0000 3534 at http://hpac.com Planning for Energy-Efficiency Retrofit Projects http://hpac.com/archive/planning-energy-efficiency-retrofit-projects <div class="field-byline"> Promod Kumar, PE; KAI Design &amp; Build; St. Louis, Mo </div> <div class="field-deck"> <p>The four phases of an energy retrofit require flexibility and creative thinking</p> </div> <div class="node-body article-body">Accounting for nearly all existing commercial space, private commercial buildings present the largest untapped opportunity for energy-efficiency retrofits. However, federal and state facilities and other institutional buildings are more likely to receive funding and, therefore, have more opportunities for energy-efficiency retrofits.</div> <div class="og_rss_groups"></div><p><a href="http://hpac.com/archive/planning-energy-efficiency-retrofit-projects" target="_blank">read more</a></p> http://hpac.com/archive/planning-energy-efficiency-retrofit-projects#comments Engineering Green Buildings Archive energy-efficiency retrofits hpac.com/columns hpac.com/green hpac.com/iep Promod Kumar Tue, 01 Mar 2011 17:00:00 +0000 4040 at http://hpac.com Benefits of a Whole-Building Design Approach http://hpac.com/archive/benefits-whole-building-design-approach <div class="field-byline"> James D. Qualk, LEED AP, BD+C; SSRCx; Nashville, Tenn. </div> <div class="field-deck"> <p>Working as a team earlier in the design process fosters creative problem-solving</p> </div> <div class="node-body article-body">Whole-building design refers to a design and construction technique that incorporates an "integrated design approach" and an "integrated team process."1 Basically, all of the elements of a building’s design need to be considered, and all team members/design stakeholders need to be involved in new ways earlier in the process.</div> <div class="og_rss_groups"></div><p><a href="http://hpac.com/archive/benefits-whole-building-design-approach" target="_blank">read more</a></p> http://hpac.com/archive/benefits-whole-building-design-approach#comments Engineering Green Buildings Archive hpac.com/columns hpac.com/green hpac.com/iep James D. Qualk Whole-building desig Tue, 01 Feb 2011 17:00:00 +0000 3609 at http://hpac.com