Re: [EnergyPlus_Support] Report for you to download: PNNL Published Appendix G Reference Manual

Section 2.4 should include two examples of system equipment with different throttling ranges, for example a heated floor with an air thermostat could have a +/- 2K throttling range vs. a fancoil unit with a much faster reaction time with the same air thermostat could have +/- 0.2K as throttling range. If I have both systems in the same building, I should actually set the throttling range or tolerance to UMLH at zone level. This option is not available at zone level in EnergyPlus (only with custom EMS)...only at building level. So if a software doesn't support this entry, what is the workaround?

Because this theme could impact on sizing, system "pulldown time" (the time it takes the system to bring the zone to setpoint after a change in setpoint) should be discussed.

Lastly, the 50 hour difference in UMLH should be mentioned together with the 300 hour limit and how to adjust capacities of the baseline via sizing factors to accommodate.

On 11 May 2016 10:19 pm, "Bing.Liu@xxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:

Â

Thank you everybodyÂ who are interested in reading this over 300 pages manual.Â The link to download theÂ report works now.

http://www.pnnl.gov/main/publications/external/technical_reports/PNNL-25130.pdfÂ

If you have suggestions to change, please feel free to contact us at PNNL.

Background:

Pacific Northwest National Laboratory recently published a technical report titled ASHRAE 90.1-2010 Performance Rating Method Reference Manual. This work was funded through DOEâ??s Building Energy Codes Program.Â The report is intended to be a reference manual for the Appendix G Performance Rating Method (PRM) of ASHRAE Standard 90.1-2010. The procedures and processes described in this manual are designed to provide consistency and accuracy by filling in gaps and providing additional details needed by users of the PRM. This document builds from existing reference manuals including the Nonresidential Alternative Compliance Method (NACM) and Commercial Energy Service Network (COMNET) and has undergone an extensive vetting and review process.

Â

Potential users of this manual include energy modelers, software developers, and implementers of â??beyond codeâ?? energy programs. Energy modelers using ASHRAE Standard 90.1-2010 for beyond code programs can use this document as a reference manual for interpreting requirements of the PRM. Software developers of tools for automated creation of the baseline model can use this reference manual as a guideline for developing the rules for the baseline model.

Â

Thanks,
Bing Liu

Bing Liu, P.E., CEM, LEED AP
Group Manager, Building Energy Regulatory Analysis
Program Manager, Building Energy Codes
Pacific Northwest National Laboratory
bing.liu@xxxxxxxx