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Published bySpencer Holland Modified over 8 years ago
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Uponor for Radiant Cooling Systems 102
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Outline Fundamentals review FEA Analysis Case Studies Piping CCN Controls Web Link to Uponor DC Specifications Submittals Design Request Form
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Fundamentals review Load – 12 to 14 Btuh/sqft, up to 32 Btuh/sqft Surface Temperature – 66 o F 67deg occupied, 65 unoccupied (ASHRAE 55 -2004) Average Water Temperature – 55 to 58 deg Dew Point – safety factor, keep water temperature 2 deg. Above dew point Spacing – 6 OC (max 9 OC) Loop Lengths – 300 - 350 ft for 5/8” Energy Equation – Btuh = 500 x gpm x dt Size of pipe – 5/8” typical Design differential temperatures 5 o F - 8 o F for cooling
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FEA Analysis
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Case Study Link Urban Outfitters HQ Uponor Radiant Heating /Cooling 53 Tons of Cooling 630 MBH of Heating Central Heating and Cooling Plant to Serve the Campus http://www.esmagazine.com/Articles/Cover_Story/BNP_GUID_9-5-2006_A_10000000000000178651
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URBN - Building 543 Challenges North / south glass High clerestory glass Open mall area Humidity producers Large volumes Aesthetic demands
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URBN - Building 543 Solutions Radiant heating and cooling slab Air side cooling for humidity control Draft barriers at occupied zones Vertical discharge diffusers
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URBN – Slab details 53 tons of cooling 630 MBH of heating 14 manifolds, each with up to 10 loops at ~ 350 ft each loop Thermal breaks at radiant slab edge Embedded floor surface temperature sensors Space dew point sensors
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URBN – Loop layout
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URBN Solutions
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Case Study Link Uponor Distribution Center Radiant Heating/Cooling AquaPEX Plumbing System 285,000 Sq Ft | LEED Silver Best in Real Estate Award 2009 http://twincities.bizjournals.com/twincities/stories/2009/04/20/focus17.html
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Uponor DC - Challenges Office next to warehouse Floor to ceiling windows Cubicles Carpet Solar gain Lobby Pressurization problems
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Uponor DC - Solutions Radiant heating and cooling slab Air side for latent, portion of sensible and ventilation load RTU CCN controlling Radiant system and communicating with BAS system
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Piping – Water temperature mixing
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Piping – Mixing with htg / clg switch over
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Piping – Primary (building) / Secondary Hot Water Chilled Water Primary Pump
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CCN Controls – Zoning by pump A ( < 3 amp )
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CCN Controls – Zoning by pump B ( > 3 amps)
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CCN Controls – Zoning by valve with common pump (1 or 2 pumps)
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CCN Controls – Zoning by thermal actuator on manifold
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CCN Controls – Zoning
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CCN – Zoning + water temperature control
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CCN – Communication available to BAS CCN Thermostats Mode Temperatures – Operative – Slab – Humidity All physical and software points – i.e. mixing valve position – Pump status – Supply and return temperatures
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Specification
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Submittals
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Questions? Thank you
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