ASHRAE Journal - October 2024 - 63

April 2023 - May 2025; Purge Rite Inc.; Principal Investigator; Russell Buras;
TC 6.08 Geothermal Heat Pump and Energy Recovery Applications; co-sponsors:
TC 6.01, Hydronic and Steam Equipment and Systems & TC 6.02, District Energy
The objective of this research will be to experimentally determine the required purging velocities
for removal of solid objects and air from hydronic piping. The results will be presented in one or
more tables showing the minimum purge velocity required for various materials, various pipe sizes,
and in both horizontal and vertical orientations, including testing of a u-bend loop for ground-source
heat pump systems.
 1900-RP Using Simulated Weather Data With Sparse Measured
Data to Produce Hourly Weather Files and Calculate Design
Conditions
April 2022 - December 2023 (P); Klimaat Consulting; Principal Investigator;
Michael Roth; TC 4.02 Climatic Information
The purpose of this follow-on effort to two previous ASHRAE projects on computer simulated
weather data (RP-1745 and RP-1561) is to combine the outputs from such methods with sparse
measured data for test cases to produce design climatic data and to produce hourly time-series
data that can then be used to determine the accuracy of the results, the level of effort required and
the potential increase in the number of locations that can be included if the method were used for
all regions of the world.
 1919-RP The Effects of Duct Size and Aspect Ratio on Flow Noise
in Elbows
January 2024 - March 2025; Vibro Acoustics; Principal Investigator: Karl
Peterman; Sponsoring Committee: TC 2.6, Sound and Vibration; co-sponsor: TC
5.2 - Duct Design
The rise in building costs demand effi cient and compact HVAC duct designs, often at the risk of
excessive noise. Improved knowledge of the relationship between duct dimensions, pressure drop
and the associated noise of common elbow fi ttings has great value to building owners, engineers
and consultants. Acousticians will be able to predict the breakout and regenerated noise more
accurately across duct fi ttings, mechanical engineers can design systems without the fear of
excess noise and the building owner will save money through empirical-based design.
 1923-RP Prepare Climatic Design Conditions for the 2025 ASHRAE
Handbook-Fundamentals and ASHRAE Standard 169
July 2022 - June 2024; Klimaat Consulting; Principal Investigator; Michael
Roth; TC 4.01, Load Calculation Data and Procedures; co-sponsor: TC 4.02,
Climatic Information
Climatic design conditions in Chapter 14 of the Handbook are essential for sizing and design
procedures for HVAC systems; they enable energy system capacity to be sized in such a way that
it meets climatic loads in a probabilistic sense. Regular updating of the climatic design conditions
has therefore a direct impact on the work of HVAC practitioners and shows due diligence in a world
of changing climate.
 1926-RP Update of U-factors, Solar Heat Gain Coeffi cients and
Visible Transmittances of Standard Fenestration Units made from
Representative Fenestration Frame and Glazing Systems in the
Fenestration Chapter of the Handbook of Fundamentals
September 2024 - June 2025; WSP Canada Inc.; Principal Investigator: Alex
McGowan; Sponsoring Committee: TC 4.5 Fenestration
Almost all buildings have fenestration. The accurate characterization of the energy performance
of the glazing in structures is critical to determine the energy-effi ciency of buildings. Architects,
building professionals and code offi cials can use the values provided by these fenestration tables
for hand calculations during schematic design and for comparison with actual products during
specifi cation. It is also useful to compare the performance data in the fenestration tables with the
product characteristics of an actual product when a simulation is conducted. Upon completion of
the project and its publication into the Handbook, this research will impact most practitioners in
the building industry. Even for those practitioners that don't use the Handbook, these values will
affect energy code default tables and fenestration energy effi ciency standards (i.e., IECC, ASHRAE
90.1 and USGBC).
 1928-RP Improving Effi ciency Test Methods to Measure Air
Cleaner Performance Against Airborne Particulate Contaminants in a
Recirculating System
April 2024 - March 2026: LMS Technologies; Principal Investigator: Kevin
Kwong; Sponsoring Committee: TC 2.09, Ultraviolet Air & Surface Treatment;
co-sponsors; TC 2.03, Gaseous Air Contaminants and Gas Contaminant Removal
Equipment, TC 2.04 Particulate Air Contaminant and Particulate Contaminant
Removal Equipment, TC 9.06, Health Care Facilities & EHC (Environmental
Health Committee)
The value to ASHRAE is a path forward towards developing new and improved test methods
that are more applicable to actual applications and are appropriate for all air cleaning devices.
Since a different test rig confi guration and procedure is needed, we need data on how various
parameters infl uence the testing and performance. This will allow us to provide test standards
that give useful, understandable and repeatable results. Parameters that need to be examined
include device location, duct entry/exit specifi cs, airfl ow, chamber dimensions and duct sizes
relative to the devices' intended usage, aerosol generation and injection schema, etc. Comparison
of realistic results with different setups and different devices will allow better understanding of
which parameters are important to specify and their infl uence on the data product resulting from
the testing.
 1929-RP Evaluation of Building Life Cycle Analysis Tools
Incorporating Embodied Carbon
April 2024 - March 2026; Montana State University; Principal Investigator:
Principal Investigator: Kevin Kwong; Sponsoring Committee: TC 2.8 Building
Environmental Impacts and Sustainability
This research project is in direct alignment with the ASHRAE decarbonization task force and is
specifi cally addressing best practices for industry stakeholders including tools to evaluate embodied
energy, embodied carbon and the reduction of operational carbon. Additionally, the project will focus
on knowledge gaps and the development of resources to address gaps by producing an evaluation of
current software tools focused on LCA and LCC in buildings.
 1934-RP A Survey Study on the Development and Application of
Data-Driven Model Predictive Control In Buildings
April 2024 - March 2025; University of Kansas; Principal Investigator: Xu Han;
Sponsoring Committee: TC 7.5 - Smart Building Systems
From the perspective of ASHRAE, the proposed project will result in the following benefi ts:
Bridging the gap between theory and practice in building operation. Recognizing the requirements
and perspectives of the building industry will facilitate the dialogue between academic
research and fi eld deployment. Inform researchers about the industry's needs. The collected
information will provide insight to researchers about the most pressing practical problems so
that research projects may be oriented accordingly. Contribution to handbooks. In the long term,
information from the survey could also be useful in the writing of the ASHRAE Handbook and
standards.
 POTENTIAL PROJECTS FOR POSSIBLE BID, REBID, OR AWARD THIS FALL 
 0003-WSP Design Guide for Radiant Heating and Cooling Systems
Responsible Committee: TC 6.5 Radiant Heating and Cooling
The goal is to develop a comprehensive guide that describes radiant heating and cooling
system technology and its benefi ts and provides key guidance related to its design, installation,
commissioning and control. The design guide will reach the audience through ASHRAE's
publication distribution network including its online platforms. Promotion of the design guide
can be done through TC 6.5 sponsored seminars, which have been successfully proposed and
accepted in the past.
 1566-TRP Equations to Estimate Evaporation Rates From Heated
Water Pools in Indoor Recreational Aquatic Facilities
Responsible Committee: TC 8.10, Mechanical Dehumidifi cation Equipment and
Heat Pipes; co-sponsor: TC 9.08, Large Building Air-Conditioning
This overall project will have several deliverables, of which the fi nal one is paramount. Namely,
the research contractor will generate text, equations and/or tables with supporting graphics, which
will be inserted into the ASHRAE Handbook-Applications. Designers will use this new information
to calculate the evaporation loads more accurately in pool enclosures.
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