Barcol-Air Radiant Ceiling

Barcol‐Air USA’s standard BRC product covers around 80% of all applications. Our BRC offers versatility in configuration to meet a wide variety of specifications.

Components:

  1. Copper tube
  2. Aluminum heat conducting rails (HCR)
  3. Fleece
  4. Panel
The BRC consists of a metal ceiling panel, heat conduction rails, copper tubing, and additional options such as acoustic blankets, fleece, and flexible hoses.

Architecture

The BRC system can be used with any powder coated metal ceiling panel and is easily incorporated into either new or renovated buildings. It can be utilized in sites ranging from open plan offices and department stores to research and development laboratories or production and assembly areas. The copper tubing can be designed to fit custom shaped ceiling panels or panels that have integral light fixtures, sprinkler heads, or other building appliances. Barcol‐Air’s radiant cooling systems are draft proof and noise free. In addition to being invisible and integrated into the ceiling, they provide architectural freedom through flexibility in panel‐dimensions, color, and perforation patterns. They offer increased ceiling height and/or more floors than traditional cooling systems because they require smaller air volumes, less duct work, and less ceiling void space. Low gloss levels and a non‐metallic finish are recommended for this product.

Controls:

The controls can range from individual room‐by‐room controllers to a completely automated building management system. We recommend and offer dew point sensors to monitor the relative humidity in the space and 6‐way valves to allow for quick changeover between heating and cooling.

Economically Sensible!

In terms of energy consumption, a cooled head perceives a lower temperature (perceived to be at least
1 to 2 °F cooler). The chilled water has a temperature of 55° F instead of a more typical 42 °F. The chiller
operates at a higher efficiency and, as the heat load is removed by water rather than air and the heat capacity per pound of water is four times the heat capacity per pound of air, energy savings are substantial. Cost savings derive from lower or equal upfront capital costs for comparable cooling loads in contrast to a traditional system, coupled with power reduction by running a smaller pump in comparison to an air vent motor, and very low maintenance since the valve is the only moving part.

Ceiling Section:

Basic system function

  • Cooling Mode
As the control valve opens, chilled water starts circulating in the copper tubing and removes the heat stored in the ceiling (panel, heat conduction rail and copper tubing) by means of conduction. As a result the surface temperature of the ceiling decreases, which immediately starts the process of radiation exchange from the warmer objects (such as people and computers) in the room to the cooler surface of the ceiling. Due to the temperature difference of the room air in the boundary layer below the ceiling and the surface temperature of the ceiling, natural convection is generated, which increases the resulting cooling capacity of the system. Natural convection is based on the buoyancy of air, which varies according to its temperature (with colder air sinks, warm air rises). The air velocity which results from natural convection is normally well below the threshold of draft occurrence in the occupied zone. On average, 70% of the cooling capacity is based on radiation and 30% on convection. Heat which is absorbed by the ceiling is removed from the room by the chilled water (via conduction). The BCC system is generally designed for a temperature differential of 2°C (˜4°F) between the supplied and returned water temperatures.

The room temperature decreases until the set point of the thermostat is achieved. To prevent the room temperature from sinking further, the control valve starts closing, reducing the volume flow rate through the ceiling and therefore reducing the capacity of the system until steady state conditions are achieved. Due to a special bonding technique, which enables very high heat transfer rates, response times to changing room conditions are practically only dependent on the response time of the control system.

Barcol Radiant Ceiling Cross-Seciton:


  • Heating Mode
Heating with the BRC system functions in the same manner as cooling, in the opposite direction. The natural convection is reduced and the primary mode of heat transfer is by radiation. The supply water temperatures are much lower than heating water used in conventional wall mounted radiators. The system is typically laid out for temperatures ranging from 30°C to 40°C (86°F to 104°F). The resulting heating capacity is equivalent to radiators operated at much higher temperatures, due to the larger transfer surface available with the ceiling. The lower supply water temperatures offer significant energy savings potential, as well as a much higher degree of thermal comfort due to a more uniform heat distribution throughout the room. In applications with large glass surfaces along the perimeter, a separate heating circuit (1 to 2 panels wide) operated at higher temperatures can compensate for incremental losses, thus allowing the building core zone to be operated at optimal conditions.

Barcol-Air Radiant Gypsum (BRG)

There is no visible difference between the BRG Chilled Ceiling and an ordinary plaster ceiling. It is distinguished not only by its ingenious technical functionality but also by its high aesthetic quality. The plaster
underside produces a seamless ceiling. 
The BRG is used in office buildings, government buildings, department stores, shopping centers and in R&D laboratories. It is used wherever a high standard of finish is required, demanding a combination of aesthetics and high performance. It is particularly outstanding when used in quiet rooms, as thermal expansion of the coils does not create any noise.

Key Benefits
  • Flexible design for architectures; i.e. unique 

    possibilities with a seamless ceiling finish
  • Energy-efficient cooling
  • Draft-free cooling, in accordance with DIN, ISO, SIA and EN standards
  • Maybe used for heating
  • Low cost of product
  • Minimal maintenance outlay
  • Highest possible Human ComfortSM
  • 100% reproducible output
  • Low water resistance
  • Installation without a permanent connection between the heat conductors and panels or substructure, preventing any cracks in the filled seams between the panels. In addition, no noise occurs in the ceiling, as there are no permanent (hydraulic) connections.
  • Calibrated copper pipes (diameter = 12 mm)
  • Efficient and quick installation
  • Cooling or heating effect with a high heat transfer


Additional Literature:
http://doas‐radiant.psu.edu/DOAS_RADIANT_HONOLULU_TP4573.pdf

We offer additional accessories: VRK (Volume Regulator Controller), Gripple Hangers, Dew Point Sensor, Nipples, Flexible Hoses, 6‐ Way Valves.
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