Varying Views on Variable-Primary Flow

Bahnfleth, William P.; Peyer, Eric B.
March 2004
Heating/Piping/Air Conditioning Engineering;Mar2004, Vol. 76 Issue 3, pS5
Discusses a survey of designers, chiller manufacturers and system owner/operators regarding variable-primary flow chilled-water systems. Use of secondary and primary pumping in chilled water systems; Effect of evaporator-flow variation on the energy consumption of chillers; Benefits and costs of variable-primary flow systems.


Related Articles

  • Variable-Primary-Flow. Peterson, Kent W. // Heating/Piping/Air Conditioning Engineering;Mar2004, Vol. 76 Issue 3, pS10 

    Discusses the conversion of a chilled-water plant from a staged constant-speed pumping configuration to a variable-primary-flow configuration in a hotel in Southern California. Reasons behind the decision of the owner to convert the chilled-water plant; Background on the configuration of the...

  • A Review of Bubble Pump Technologies. Benhmidene, A.; Chaouachi, B.; Gabsi, S. // Journal of Applied Sciences;2010, Vol. 10 Issue 16, p1806 

    This study provides a literature review on bubble pump using in diffusion-absorption refrigeration technology. A numbers of bubble pump configurations are provided and discussed. Many parameters influencing the performance of the bubble pump are presented. It is hoped that, this study should be...

  • Design Tips. Rinaldi, Keith // Heating/Piping/Air Conditioning Engineering;May2005, Vol. 77 Issue 5, p54 

    Discusses several considerations in the installation of a cooling tower. Water treatment practices and systems; Balance of water flow between tower cells; Utilization of low-net positive suction head-required pumps; Location of the cooling tower.

  • Ammonia Pump-Out Systems, Part 3. Jordan, Peter // Process Cooling & Equipment;Jan2007, p16 

    The author demonstrates how the features and advantages of a pump-out system can be used thru a case history at a representative frozen food plant located in the U.S. He states that in the plant, a complete pump-out system was installed as part of the initial installation of the ammonia...

  • Survey Says: R-410A Catching On. Powell, Peter // Air Conditioning, Heating & Refrigeration News;7/27/2009, Vol. 237 Issue 13, p1 

    The article presents an industrial survey regarding the acceptance condition of the R-410A air conditioning refrigerant to the contractors in the U.S. Survey shows that most of the contractors in the country have accepted the R410A after the phasing out of HCFC-22 refrigerant and equipment. In...

  • Displaying Efficiency. Walker, David H.; Faramarzi, Ramin T.; Baxter, Van D. // Appliance Design;Jun2005, Vol. 53 Issue 6, p28 

    Discusses the development of a supermarket display case for purposes of demonstrating techniques for optimizing energy efficiency. Temperature maintained at display cases in supermarkets; Sources of the display case refrigeration load; Evaluation of energy-efficiency measures.

  • Hermetics Deal With New Energy Issues. Smith, Leland // Air Conditioning, Heating & Refrigeration News;7/7/2008, Vol. 234 Issue 10, p23 

    The article focuses on the design of new refrigerating equipment based on energy efficiency standards. It deals on hermetic compressors that can be responsible for about 60 percent of the total energy use of a system. It notes that the compressors are often found in reach-ins, ice machines, and...

  • The Efficiency Equation. Rajendran, Rajan // Appliance Design;May2008, Vol. 56 Issue 5, p32 

    The article offers information on the electric motors Annual Energy Efficiency Ratio (AEER), a new measure of refrigeration efficiency that promises to improve system design. The AEER allows for a better representation of how refrigeration systems actually operate, considering factors that do...

  • Optimizing Chillers & Towers. Crowther, Hugh; Furlong, James // ASHRAE Journal;Jul2004, Vol. 46 Issue 7, p34 

    Emphasizes controls logic and design conditions and how they can be used for optimizing chiller, cooling tower, and condenser pump system performance throughout the year. Software model of an hour-after-hour energy use for a typical office building in three cities; Manipulation of the size of...


Read the Article


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

Try another library?
Sign out of this library

Other Topics