Engineered Systems - December 2008 - (Page 24)

Application Checklist Hotels, Motels, and Dormitories (Published as part of “Back2Basics” and “HVACR Designer Tips” for October through December 2008.) • Renewable energy . . . . . . . . . • Enhanced commission . . . . . . . • Enhanced refrigerant management • Measure and veriﬁcation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ✓ . . . . . . . . . . . . . . . . . [0] .[10] . [0] . [5] The following system analysis and analytical scorecard can be used to assess the use of rooftop unit with energy recovery in dormitories. The approach is based in part on the 2004 ASHRAE Handbook – Systems and Equipment, Chapter 1 “System Analysis and Selection” and the 2007 ASHRAE Handbook – Applications, Chapter 5, “Hotels, Motels, and Dormitories.” In addition, our scoring is based on our own design, construction, commissioning, and building management experience. Scoring may differ based on project location, current costs, and local engineering experience. The design intent of the HVAC system is to provide individual dormitory room HVAC space temperature control (no humidity control) within reasonable heating and cooling parameters and 5° dead-band. This month’s “Back2Basics” focuses on the building/energy management portion of the system application while “HVACR Designer Tips” focuses on project closeout. The analysis and selection of the optimum HVAC system for a speciﬁc project can be determined through energy and life-cycle system analysis software program studies. This assessment should be part of optimizing energy performance when pursuing LEED® project certiﬁcation, as well as other high-performance grant programs. Application Notes • Zero to 10 score, with 10 being excellent and 0 being poor or not • BAS trending • Remote monitoring • Space, equipment, and energy monitoring • Local and regional material . . . • Minimum IAQ performance . . . • Emissions control . . . . . . . . • Increase ventilation effectiveness • Controllability of systems . . . . • Thermal comfort . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [4] [8] [0] [7] [6] [7] Total score: . . . . . . . . . . . . . . . . . . . . . . 65 SUSTAINABLE BUILDING MANAGEMENT SCORECARD (MAXIMUM SCORE = 60) • Assets barcoded . . . . . . . . . . . . . . . . . . . . . .[10] • Approximate number of workorders annually . . . . . . . [6] • Serviceability outside occupied space . . . . . . . . . . . [9] • Serviceability during normal working hours . . . . . . . . [9] • Ease of replacement at end of useful service life . . . . . [8] • Continuous trending, benchmarking, and course-correction[6] Total score: . . . . . . . . . . . . . . . . . . . . . . 48 applicable. SYSTEM ANALYSIS AND SELECTION SCORECARD (MAXIMUM SCORE = 120) • Space temperature control. . . • Space humidity control. . . . . • IAQ . . . . . . . . . . . . . . . • Ventilation control . . . . . . . • Equipment airborne noise . . . • Equipment radiant noise . . . . • Useful service life of equipment • Equipment room requirement . • System constraints. . . . . . . • First cost . . . . . . . . . . . . • Operating cost . . . . . . . . . • Maintenance cost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [8] [0] [6] [8] [8] [7] [6] [9] [7] [7] [8] [7] Total HVAC system application score is 194 points out of a possible 310 points, for a rating of 63%. McKew is an HVAC commissioning engineer in the Building Solutions Group at RDK Engineers. If you have any comments, suggestions, or questions regarding this designer checklist, contact Amanda McKew at amckew@rdkengineers.com. • Total score: . . . . . . . . . . . . . . . . . . . . . 81 SUSTAINABLE DESIGN SCORECARD (MAXIMUM SCORE = 130) • Fundamental prerequisite commissioning . . . . . . . . .[10] • Fundamental refrigerant management . . . . . . . . . . . [0] • Optimize energy performance . . . . . . . . . . . . . . . [8] 24 En g i neer ed Sy stem s December 2008

Table of Contents Feed for the Digital Edition of Engineered Systems - December 2008

Engineered Systems - December 2008 Contents Editor's Note HVAC Challenge Back2Basics Case In Point Commissioning Building Automation HVACR Designer Tips Applications Checklist Lakefront Library: Radiant Systems Meet Natural Ventilation Before (And After) The Flood Basics For Refrigerant Chillers Wire-To-Shaft Efficiency For HVAC Pumps Products Glossary Classifieds Advertiser Index Tomorrow’s Environment

Engineered Systems - December 2008

For optimal viewing of this digital publication, please enable JavaScript and then refresh the page. If you would like to try to load the digital publication without using Flash Player detection, please click here.