a:31:{s:9:"weblog_id";s:2:"10";s:8:"entry_id";s:4:"1137";s:6:"sticky";s:1:"n";s:14:"allow_comments";s:1:"n";s:16:"allow_trackbacks";s:1:"n";s:10:"entry_date";s:19:"2011-03-01 02:46 PM";s:15:"expiration_date";s:0:"";s:23:"comment_expiration_date";s:0:"";s:9:"author_id";s:1:"4";s:10:"new_weblog";s:2:"10";s:6:"status";s:4:"open";s:14:"trackback_urls";s:0:"";s:18:"versioning_enabled";s:1:"y";s:5:"title";s:71:"Economizer High-Limit Control Strategies /VAV Reheat Control Strategies";s:9:"url_title";s:70:"economizer_high_limit_control_strategies_vav_reheat_control_strategies";s:6:"submit";s:6:"Update";s:11:"field_id_58";s:71:"Economizer High-Limit Control Strategies /VAV Reheat Control Strategies";s:11:"field_ft_58";s:4:"none";s:11:"field_id_62";s:304:"ASHRAE Meeting: Outdoor air economizers use controllable dampers to increase the amount of outside air drawn into the building when the outside air is cool or cold and the system requires cooling. Variable air volume (VAV) air systems are a key component of modern medium to large building zone control. ";s:11:"field_ft_62";s:4:"none";s:11:"field_id_59";s:6:"ASHRAE";s:11:"field_ft_59";s:4:"none";s:11:"field_id_63";s:36:"Russo\'s Spazio, 12031 Lackland Rd. ";s:11:"field_ft_63";s:4:"none";s:11:"field_id_57";s:19:"2011-03-14 05:00 PM";s:15:"field_offset_57";s:1:"y";s:11:"field_id_56";s:0:"";s:15:"field_offset_56";s:1:"y";s:11:"field_id_55";s:17:"5 p.m. -7:50 p.m.";s:11:"field_ft_55";s:4:"none";s:11:"field_id_60";s:3095:"<p><strong>ASHRAE Meeting<br />Monday, March 14</strong></p>
<p>Outdoor air economizers use controllable dampers to increase the amount of outside air drawn into the building when the outside air is cool or cold and the system requires cooling. Variable air volume (VAV) air systems are a key component of modern medium to large building zone control. Speaker Steven T. Taylor, PE, principal at Taylor Engineering, Alameda, CA. will address both topics.  <a href=\"blogfiles/Steve_Taylor_resume.pdf\">Click here for more information on Steven Taylor.</a><strong><br /><br />5:00-5:50 pm Tech Session (1.0 PDH) - Economizer High-Limit Control Strategies</strong></p>
<p>Outdoor air economizers use controllable dampers to increase the amount of outside air drawn into the building when the outside air is cool or cold and the system requires cooling. They are required by energy standards such as Standard 90.1 in most commercial cooling applica tions.  Supply air temperature is maintained at setpoint by first opening the economizer outdoor air damper and closing the return air damper, then opening the chilled water valve if additional cooling is required. A key element of the economizer control system is the high limit switch that determines whether outdoor air is in fact appropriate for cooling and en ables or disables the economizer dampers accordingly. This high limit device, which has long been misunderstood, is the subject of this presen tation.</p>
<p><strong>6:00 pm Dinner</strong></p>
<p><strong>6:30-7:30 pm Main Session (1.0 PDH) - VAV Reheat Control Strate gies</strong></p>
<p>Variable air volume (VAV) air systems are a key component of modern medium to large building zone control. Most VAV systems have pressure independent terminals which use airflow control systems to operate zone dampers. Proper controls and system design will ensure that the building will be operated efficiently, resulting in strategies that maximize comfort and minimize energy usage. Recent advances in VAV controls such as additional control strategies and improvements in low air flow measure&shy;ment will enhance VAV control performance for current best practice de&shy;sign.</p>
<p><strong>7:50 - 9:00 pm Post Event - YEA (Young Engineers in ASHRAE) Men&shy;toring Event</strong></p>
<p>This YEA Mentoring Event is welcome to all members and will start after conclusion of the Chapter Meeting.  Dr James Mathias, Associate Profes&shy;sor of Mechanical Engineering at SIU-C and his Father Duane Mathias have won an ASHRAE award for Best Paper and Poster on their Design and Construction of a Passive Solar Home.  They will present various energy efficient features of their home and have a Q&amp;A Session.  All are welcome please indicate on the Chapter Sign up form if you are going to attend.</p>
<p><a href=\"/blogfiles/Steve_Taylor_resume.pdf\"></a></p>
<p>Program is free for ASHRAE members with current dues. Cost is $25 for non-members. <a href=\"https://echapter.ashrae6.org/mtg_meetings.php?CHAPTERNBR=054\" title=\"Click here to register. \">Click here for registration </a></p>";}