ASHRAE Journal - March 2010 - 60

SECond PlACE Environmental Impact. The environmental impact of the Kirsch Center is small; however, it is a model for the CCC system. Robert N. Roop, member ashrae New Whitmore Lake High School institutional buildings, new Low flow water closets and waterless urinals were installed and all storm water run-off is routed to a retention pond. Stephan (Steve) L. Weidner, P.E., member ashrae 100 Howe Building commercial buildings, new Energy Efficiency. Heating and cooling is served by a closed loop water source heat pump system coupled to a geo-exchange field. Small unitary heat pumps provide individual space temperature control and four VAV plate-type air-to-air energy recovery units pre-treat all ventilation air. Indoor Air Quality. Sensor and zone temperature controls follow heating and cooling requirements of the spaces. Innovation. An on-site pond fulfills two needs: fire protection water supply and heat/sink source for the geo-exchange field. Operation and Maintenance. Ease of accessibility and removal and/or replacement of equipment were of importance to the owners. Unitary heat pumps and their associated energy recovery units were located in one of two mechanical mezzanines. Cost Effectiveness. The mechanical systems designed were installed within the construction budget. Environmental Impact. The project received two LEED credits for diverting more than 75% of construction waste from disposal. Energy Efficiency. Energy consumption was calculated to be 63% of a standard overhead VAV system. Indoor Air Quality. A slightly positive static pressure is maintained, which helps avoid infiltration of unfiltered, unconditioned air. Innovation. The passive chilled beam application is thought to be the first of its kind in the central U.S. and the largest hybrid UFAD/chilled beam application in the country. Operation and Maintenance. No additional maintenance staff has been needed, despite over a 25% increase in the facility management firm’s portfolio square footage that resulted from bringing the building on line. Cost Effectiveness. Construction first costs were lowered by using a chilled beam mock-up and information session that educated potential bidders, leading to bids that helped keep the MEP cost below $75/ft2 ($807/m2). Environmental Impact. Electrical energy consumption is 41% less and natural gas consumption is 24% less than a similar building on campus, except for its mechanical and electrical systems. HonoRABlE mEnTIon Réjean Blais, P.E., member ashrae Poste de police de la Sureté du Québec à Vaudreuil-Dorion institutional buildings, new Innovation. Decentralized heat pump chillers in the DOAS Energy Efficiency. DDC system monitors all mechanical equipment. Indoor Air Quality. One fresh air ventilation unit was installed. Innovation. Three separate water loops are used. Operation and Maintenance. Automatic controls regulate system operations, as well as the heating, ventilation and airconditioning systems. Cost Effectiveness. The mechanical system design generates yearly savings of $52,750. Environmental Impact. Greenhouse gas emissions were reduced by 120 tons/yr (109 Mg/yr). In addition, rain water recuperation will save about 62.2% potable water consumption. Roland Charneux, P.E., fellow ashrae Place Desjardins Inc. – Office Towers Energy Retrofit commercial buildings, existing and AHU mechanical rooms minimized first cost and reduced central plant chiller load. Operation and Maintenance. Replacement of the heated pan humidifiers with adiabatic humidifier helped reduce maintenance costs and downtime. Cost Effectiveness. For the three towers combined, work performed required an investment of $3,390,000. This translated into a simple payback of 6.4 years (when excluding operation and maintenance benefits). Energy efficiency grants amounted to $1,144,000, for a simple payback of 4.2 years. Environmental Impact. Electricity savings are more than 10,000 MWh per year, and the avoided CO2 emissions from the electric energy savings are 200 metric tons/yr. Glenn Friedman, P.E., member ashrae University of California Merced, Sierra Terraces Dormitory Buildings 1 and 2 residential, new Energy Efficiency. The proposed modifications resulted in reduced Energy Efficiency. The campus achieved 0.8 tons (2.8 kW) of electrical demand. Indoor Air Quality. The outside air provided by the dedicated outdoor air system is above the requirements dictated by ASHRAE Standard 62.1. 60 ASHRAE Journal cooling per 1,000 ft2 (93 m2) or 1,240 ft2/ton (115 m2/kW). Indoor Air Quality. Operable windows for user controlled natural ventilation were installed, as well as central AHUs allowing higher efficiency MERV-13 filtered air. ashrae.org March 2010

ASHRAE Journal - March 2010

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