Energy-Saving Strategies for Rooftop VAV Systems

Murphy, John
May 2008
Heating/Piping/Air Conditioning Engineering;May2008, Vol. 80 Issue 5, p28
The article discusses the heating, ventilation and air conditioning (HVAC)-system control strategies that can be used to save energy in rooftop variable-air-volume (VAV) systems. The concept of rooftop VAV systems are used to provide comfort in a wide range of building types and climates. The optimal start strategy utilizes a building-automation system to determine the length of required time in order to bring each zone from its current temperature to the occupied set-point temperature.


Related Articles

  • HVAC: The Next Generation. Mumma, Stanley A.; Ashrae, P.E. // Consulting-Specifying Engineer;Jan2003, Vol. 33 Issue 1, p38 

    Focuses on the integration of outside-air, radiant ceilings and total energy recovery in the heating, ventilation and airconditioning (HVAC) strategy in the U.S. Advantages of HVAC over variable-air-volume (VAV) systems; Advantages of VAV over other all-air systems; Reduction of fan energy...

  • Determining Minimum Airflow Setpoint.  // ASHRAE Journal;Mar2004, Vol. 46 Issue 3, p36 

    Provides tips on how to calculate and determine minimum airflow setpoint. Mechanics of the conversion of the velocity pressure from the flow probe; Suggested methods for stable control around a setpoint; Steps to calculate the controllable minimum airflow rate for a particular combination of...

  • Compensation of Manual Reset to Offset Thermal Loads Change for PID Controller. Yamakawa, Yuji; Yamazaki, Takanori; Kamimura, Kazuyuki; Kurosu, Shigeru // ASHRAE Transactions;2010, Vol. 116 Issue 1, p303 

    In the heating, ventilating, and air-conditioning (HVAC) systems, Proportional-plus-integral (simply, PI) controllers are by far the most common control algorithm and this situation has not yet changed greatly. With a simple Proportional (P) controller, there would be an offset, which the...

  • VAV For Laboratory Spaces. Liescheidt, Steven G. // Engineered Systems;Apr2011, Vol. 28 Issue 4, p38 

    The article focuses on the variable air volume (VAV) systems that have been designed in laboratory exhaust and supply systems. According to the article, engineers are challenged to optimize a system from every aspect of energy savings, functional performance and comfort during the majority of...

  • Modern Efficiencies. VANOORT, ADAM // American School & University;Sep2012, Vol. 85 Issue 1, p26 

    The article discusses the management of the colleges and universities in improving the efficiency of energy to control costs. It mentions that modern control techniques can improve the efficiency of new installations and legacy systems by implementing the heating, ventilating, and air...

  • Combining DOAS and VRF, PART 1 OF 2. BOWERS, GRANT // Heating/Piping/Air Conditioning Engineering;Mar2014, Vol. 86 Issue 3, p42 

    The article discusses the feasibility of combining a dedicated outdoor-air system (DOAS) with a variable-refrigerant-flow (VRF) system. It describes the limitations of a variable-air-volume (VAV) design system and of a VAV-System Installation and Operation. It also discusses other drawbacks of...

  • Reverse Heating & Cooling Systems. Greeley, Damon G.; Platt, Mark // ASHRAE Journal;Oct2005, Vol. 47 Issue 10, p28 

    This article examines a conventional alternative to the traditional variable air volume systems being implemented at Howard Regional Health System in Kokomo, Indiana. The design team found a way to cut installed cost with a unique reverse heating cooling airside design while avoiding any...

  • Luther Home of Mercy KoolDuct Study. Anderson, Nicholas R. // FacilityCare;Aug2010, Vol. 15 Issue 5, p28 

    The article explores a study that compares two identical buildings of Luther Home of Mercy in Ohio that have different heating, ventilation and air conditioning (HVAC) systems. It mentions that one has a conventional sheet metal duct system, while the other has a rigid phenolic pre-insulated...

  • Draft Air systems ensure big energy saving.  // Textile Magazine;May2009, Vol. 50 Issue 7, p61 

    The article features Draft Air (India) Pvt. Ltd. Founded by G. D. Panchal, the company sells humidification, waste collection and ventilation systems. The company's variable volume technology, which regulates air circulation according to load demand, is discussed. The company claims that using...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics