Below are several messages that you maybe interested in reviewing concerning:

  1. Design Guides for going beyond ASHRAE:
  2. Information on Biodiesel
  3. Rightsizing Rooftop Equipment

 

Arnie

1.  Design Guides for Going beyond ASHRAE:

*       Michael Deru, from the NREL Buildings group, is producing design guidelines for achieving 30% energy savings beyond ASHRAE 90.1-2004 for eight Army Corps of Engineers building types in 15 climate zones. These building types are training barracks, unaccompanied enlisted personnel housing barracks, small office building, maintenance facility, dining facility, medium office building, daycare center, and reserve center.  Drafts have been completed for the first four of these buildings and the finals will be done soon. Work on the other four will start in October. The information will be publicly available. I would think the small and medium office buildings information would be useful.

*       Labs21 has draft energy modeling guidelines available at http://www.epa.gov/lab21gov/pdf/ashrae_appg_draft_508.pdf. There is a design guide that may be useful also - see http://www.epa.gov/lab21gov/toolkit/design_guide.htm .

 
*       NREL used DOE-2 for the new Science and Technology Facility and will likely use either DOE-2 or Energy Plus for the planned Research Support Facility.

*       AutoCAD and the US Green Building Council (USGBC) have formed a partnership:
        AutoDesk, the creators of AutoCAD software, and USGBC recently announced that it has entered into a strategic relationship with USGBC aimed at expanding the use of technology and to facilitate further adoption of sustainable design and green building. Autodesk and USGBC plan to work on several initiatives to make sustainable design easier and more efficient through the use of technology such as the Autodesk Revit platform for building information modeling (BIM). As the first step, Autodesk and the USGBC plan to develop an educational curriculum for architecture and engineering students.

        More information is available on p. 2 of http://chapters.usgbc.org/westmichigan/docs/pdf/USGBCWM_Newsletter_Dec2006.pdf

2.      Biodiesel Information

Per our discussion last week at the EEWG meeting, there is biodiesel information on the following web site - http://www.nrel.gov/vehiclesandfuels/npbf/pubs_biodiesel.html. "Biodiesel Handling and Use" is the first link. The fleet evaluation information may be of interest also (see links at the bottom of the page). The second report is for a USPS fleet evaluation.

Other links that may be useful:
Federal Network of Sustainability - http://www.federalsustainability.org/initiatives/biodiesel.htm
National Biodiesel Board - http://www.biodiesel.org/
 

3.  Rightsizing Rooftop Equipment

A promotional message from HPAC Engineering

Rightsizing Rooftop Equipment

Like an automobile in stop-and-go traffic, a rooftop package unit suffers as a result of excessive cycling. Starts and stops accelerate wear and tear on equipment, which can lead to premature failure. Compared with their "rightsized" counterparts, oversized systems cost more, do not dehumidify as well, use more fan power, and can have more duct leakage because of higher duct pressure. Oversized air conditioners greatly aggravate peak kilowatt demand on hot days. Rooftop units in smaller sizes have one compressor and operate in an "on" or "off" mode. Equipment usually is selected to provide the needed capacity on the hottest afternoon of the hottest summer. Because those conditions occur infrequently, a single compressor is more or less oversized for all conditions less severe than maximum design. This excess capacity causes short-cycling and higher operating costs. Dual refrigerant circuits, each with its independent compressor, can more closely provide the right amount of cooling needed. Unless conditions require the second circuit, only one compressor is used—consuming less energy than a single-compressor air conditioner would use.

The presenter:
A member of HPAC Engineering's Editorial Advisory Board, Mike West, PhD, PE, is a principal building-systems scientist with Advantek Consulting Inc. in Melbourne, Fla. His expertise includes HVAC problem solving, design consulting, and HVAC-equipment development.

The Webcast will take place Wednesday, Aug. 22, at 2 p.m. ET. It will run for one hour and include a valuable Q & A session.

Register Today!