Mechanical & Plumbing
March 12, 2011ASHRAE continues to widen the temperature and humidity ranges for servers through a soon-to-be-published third edition of the book, “Thermal Guidelines for Data Processing Environments”. The first edition was published in 2004 and, according to ASHRAE’s Don Beaty, created the first global, vendor-neutral environmental spec for data centres.
March 3, 2011The newest guidance for using Ashrae Standard 62.1-2010 includes a revised, “user-friendly” spreadsheet and examples, as well as the latest updates pertaining to the new version of the standard. The 62.1 User’s Manual provides explanatory material, detailed information, figures and examples to guide users in designing, installing and operating buildings in accordance with ANSI/Ashrae Standard 62.1-2010, Ventilation for Acceptable Indoor Air Quality, which sets minimum ventilation rates and other requirements for commercial and institutional buildings. CLICK HERE for details on ordering.
February 28, 2011 Air King claims its new AKF100D Deluxe Quiet dual speed exhaust fan with light provides cost-effective, energy-efficient ventilation at low level sounds. “Ashrae 62.2 ventilation can be accomplished by using the HVI-certified low speed of 50 CFM at 0.3 sones (barely audible) for continuous ventilation of the home and the HVI-certified high speed of 100CFM at 1.5 sones for when the room is occupied and in need of additional ventilation power,” it says. The Energy Star-qualified fan features a contoured, low profile grill design with a moonstone glass light lens said to disperse light evenly throughout the room, and includes a 26W-energy efficient fluorescent lamp and a 4W-nightlight. It is ETL listed for installation over a tub or shower on a GFCI circuit.
Now available in both Canada and the U.S., the multi-function wireless actuator can be integrated with building automation systems, through an existing building control gateway. It was produced by German-based Kieback & Peter and designed for use on continuous closed-loop control systems and communicates based on EnOcean technology. Named for its three-in-one functionality, the M3 exceeds the scope of traditional actuators, says Illumra, the exclusive North American distributor of the product.
A new book from Ashrae, “Green Tips for Data Centers”, aims to help reduce energy use in existing datacom facilities through what the company calls “proven and easy-to-implement” tips. As part of the Ashrae Datacom series, the book identifies operational changes, upgrades or modifiations that are expected to optimize energy efficiency. Among the 26 tips are optimize supply air temperatures; install monitoring equipment; improve lighting efficiency; optimize data storage; and improve transformer efficiencies.
Continental Fan (Aeroflo in Canada) says its TCC motorized blower is a “superbly crafted, precision balanced air-moving package that features superior performance and exceptional smoothness”. The blower is designed for applications requiring low noise. The fan combines a computer-designed, flange-mounted scroll housing with a TMK motorized impeller for improved air performance and sound levels. The steel housing has a corrosion-resistant epoxy coating. The TCC boasts a speed-controllable external rotor motor, BC airfoil polyamide impeller, availability in single- or three-phase voltages, capacities from 500 cfm to 5000 cfm, and cULus and CE approvals.AEROFLO
Continental Fan says its product features superior performance in a compact design. They are ideally suited to applications where space is limited. The coupling of motor and impeller minimizes space requirements and provides for vibration free operation, says the company. AMP fans are completely speed controllable. Both motor and impeller are located directly in the air stream, where the impeller acts as a rotating "heat sink" with excellent heat dissipation and efficient motor cooling, says the company. Near zero speeds can be achieved using solid-state speed controls. Continental Fan offers a complete line of axial and centrifugal motorized impellers with AC, DC or EC high-efficiency motors, in a choice of housed or non-housed units.  For more information, go to www.continentalfan.com.
Continental Fan says its ventilator provides aerodynamically efficient performance with airflow capacities to 61,000 cfm. This ventilator is constructed with a heavy-duty welded steel base, galvanized butterfly exhaust damper section and a spark-resistant cast aluminum airfoil axial impeller. The UBV belt drive upblast roof ventilator has its motor located outside the air stream, and is ideal for hot or contaminated air streams. The UBV is suitable for general ventilation applications or to exhaust heat or smoke fumes.  Other features include: weatherproof closure for vertical air discharge; factory set adjustable pitch blades; and extended lube lines. For more information, go to www.continentalfan.com.
Continental Fan says its DX motorized centrifugal impeller is a superbly crafted, precision balanced air-moving device that features superior performance and compact design. It is ideally suited to applications where space is limited. The coupling of the motor and impeller minimizes space requirements, says the company, and provides for a vibration free-operation. The company says that by combining the efficiency of a backward curved airfoil wheel with the advanced technology of a DC external rotor motor, new standards for air performance and sound levels have been achieved. Suitable for either supply or exhaust applications, the DX Impeller is suited for those applications where transient electrical noise is prohibited. The DX impeller is fully and completely speed controllable.    For more information, go to www.continentalfan.com.  
  The VAV building automation controller is capable of bidirectional communication with EnOcean and wired end-devices. The controller features an embedded EnOcean transceiver and EnOcean-to-BACnet gateway, allowing total wireless control of energy harvesting end-devices within an end-to-end BACnet system. Extending the reach of centralized building automation systems, the company says the VAV controller is a fully-programmable device with an on-board pressure sensor capable of meeting VAV application requirements. The CAN2GO controller can act either as a stand-alone product or be integrated into a larger BACnet system. CAN2GO says EnOcean is the only interoperable wireless standard that enables zero-maintenance, self-powered, battery-free operations. Employed as gateways, this product can convert EnOcean and wired end-devices to BACnet objects, enabling integration into BACnet systems. They can also act as servers, hosting a complete IP web-interface capable of managing all controllers and their end devices, says the company. For more information, visit www.can2go.com.
These air-moving devices are available in 8-in. to 15-in. diameters, with capacities up to 3,410 cfm. CPB blowers provide the perfect solution to many industrial and commercial air-moving requirements, says the company. The cast aluminum radial bladed wheels are ideal for exhaust systems where air is laden with dust or grit. The blowers may also be used to supply high pressure air for cooling applications and conveying systems. According to Continental Fan, other features and benefits include: spark-resistant construction; circular inlet and outlet collars; single- or three-phase TEFC motors; CW & CCW rotation, rotatable to four positions; and the products are suitable for 0°F to 160°F. For more information, go to www.continentalfan.com.  
Continental Fan’s MNC mixed flow cooling fan is designed for exceptionally quiet and rapid heat dissipation. The fans utilize the patented MF mixed flow Impeller, incorporating an adjustable blade geometry to provide a wide range of performance options. Designed with the latest computer aided technology, MNC says the fan has “non-stall” airflow properties and non-overloading absorbed power characteristics. The fans have medium-pressure capabilities and are available in nine sizes that can produce airflows to 20,000 cfm. Custom mounting arms and special designs are available to accommodate most applications.  Standard NEMA motors are used so that the fans can be connected to independent control systems.   For more information, go to www.continentalfan.com.
When designing the mechanical system for our new headquarters at A Grander View, Enermodal Engineering chose to use a variable-flow refrigerant (VFR) multi-split system. Although this system is not new—it is frequently used in Japan—it is a relatively unusual system in Canada, as suppliers only recently developed units that can operate reliably throughout our winters. The VFR system has proven highly effective. Our office building is considered the most energy-efficient office in Canada, using 75 kWh/m2 (the Canadian average is 375 kWh/m2).
New requirements regarding natural ventilation, exhaust systems and the IAQ Procedure are included in the recently published 2010 version of ANSI/ASHRAE Standard 62.1, according to an ASHRAE press release.   ANSI/ASHRAE Standard 62.1-2010, Ventilation for Acceptable Indoor Air Quality, sets minimum ventilation rates and other requirements for commercial and institutional buildings.           “Since first being published in 1973, the standard has provided the basis for ventilation system design throughout the industry,” said Roger Hedrick, committee chair. “The 2010 standard furthers ASHRAE’s work in ensuring acceptable indoor air quality, while also heeding the need for energy efficiency as we strive to find ways to help designers tailor ventilation system designs to each particular application.”             Among the changes to the 2010 standard are modifications to the Natural Ventilation Rate Procedure. Most buildings designed to meet the natural ventilation requirements are now required to include a mechanical ventilation system designed to meet the Ventilation Rate or IAQ procedures. The mechanical system is to be used when windows are closed due to extreme outdoor temperatures, noise and security concerns.             Another change relocates requirements related to exhaust systems to a new section, clarifying that exhaust requirements apply to all buildings regardless of the procedure used to determine outdoor air intake flow rates.             The IAQ procedure, which allows for the calculation of the amount of outdoor air necessary to maintain the levels of indoor air contaminants below recommended levels, has been made more robust by increasing requirements for using the “similar building” design approach and clarifying other requirements.                 The cost of Standard 62.1-2010, Ventilation for Acceptable Indoor Air Quality, is $69 ($59 ASHRAE members). For more information, visit www.ashrae.org/bookstore.
The High Volume Low Speed (HVLS) fan series is designed to provide facilities with a cost-effective and energy efficient cooling and heating solution, says Serco. The fans work, says the company, by using aerodynamics to slowly move a massive column of air, creating a deep horizontal floor jet that circulates the air in large spaces. The breeze created by the HVLS fans breaks the moisture-saturated boundary layer on the skin, providing an 8-10° cooling sensation. Serco says this allows facilities to raise thermostats in the summer months, saving money on their air conditioning bills without sacrificing the comfort of their workers. In colder months, the fans enable “destratification” of the facility by running in reverse to circulate hot air trapped at ceiling level. Serco’s HVLS fans include patented components designed to maximize the fan’s effectiveness, and can also contribute to LEED Certification credits, says the company. SERCO
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