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Effect of inlet duct and damper design on fan performance and static pressure measurements (ASHRAE 1743 RP).

Number: pap. 2659

Author(s) : HOSSAIN M. Y., BACH C. K., SAN O.

Summary

ASHARE and AHRI provide various standards for designing a test setup for HVAC systems, albeit with limited detail for the inlet ductwork design. The purpose of this study is to develop an inlet duct design guideline for inclusion in the AHRI and ASHRAE testing standards that reduces the risk of false testing failures and will lead higher integrity of the testing results at different laboratories. False testing failures in this context are differences between measured performance data by third party accreditation laboratories relative to a manufacturers own laboratory that exceed the allowable tolerances given in the applicable standards and are caused by reasons that are unrelated to the actual performance of the equipment. Such reasons include differences in the inlet ductwork that will affect the equipment’s fan performance.

This study will evaluate the performance of the fan of the indoor air handler of split systems for various design parameters including the fan and motor type of the air handling unit, inlet duct and damper configurations and air flowrate through the unit. Fan power consumption and air flowrate of the system are to be determined for a range of static pressures for different inlet duct/damper configurations.

The test plan includes indoor air handlers of 1.5-ton, 3-ton and 5-ton capacity of several manufacturers. It additionally includes furnace and coil. For the air handling unit’s fans three types of motors and two types of fan configurations are considered. Static pressures will be measured between the inlet and outlet of the air handler. Finally, the experimental results will be used to validate future CFD simulations of the inlet ductwork.

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Pages: 10

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Details

  • Original title: Effect of inlet duct and damper design on fan performance and static pressure measurements (ASHRAE 1743 RP).
  • Record ID : 30024707
  • Languages: English
  • Subject: Regulation
  • Source: 2018 Purdue Conferences. 17th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2018/07/09

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