Answers, details about ASHRAE 90.1 Addendum ch

Several questions were addressed by the presenters after the ‘HVAC: New chiller requirements’ webcast.

09/16/2014


J. Patrick Banse from Smith Seckman Reid and Jason Gerke from GRAEF tackled several questions for the live webcast 'HVAC: New chiller requirements.Though J. Patrick Banse from Smith Seckman Reid in Houston and Jason Gerke from GRAEF in Milwaukee tackled several questions during the live webcast 'HVAC: New chiller requirements,' several audience members had additional questions. A selection of these answers is included below.

Question: Are air cooled chillers also rated in kW/Ton?

  • J. Patrick Banse: Air cooled chillers have ratings expressed in energy efficiency ratio (EER), which is determined by BTU/W.

Question: Can energy efficiency values be exceeded and still meet ASHRAE Standard 90.1?

  • J. Patrick Banse: If by exceeded you mean be more efficient (lower values)-then, yes. If by exceeded you mean less efficient (higher values)-then, no.

Question: It's all very well selecting an efficient chiller (and all the other equipment that ASHRAE 90.1 covers), but if they're not put together "properly," the system may not be efficient. Does ASHRAE 90.1 stipulate the overall efficiency of the system? If so, where does it stipulate this?

  • Jason Gerke: ASHRAE 90.1 allows for multiple compliance paths for HVAC systems. These paths include the "simplified approach" or "mandatory approach." The simplified approach provides a list of required compliance items. The mandatory approach compliance may be accomplished through either selection of equipment meeting minimum efficiencies in the tables and other criteria or the energy may complete an "energy cost budget" calculation to prove compliance.

Question: Can air cooled systems beat the system efficiency of water cooled considering all loads, fans, pumps, etc.? Or in other words, is a big centrifugal chiller always the best?

  • Jason Gerke: This answer will depend on the building type, location, and use of the space. A small air cooled chiller can easy beat the efficiency of a water cooled machine, but the equipment selection criteria may only allow an air cooled machine to be used because of the capacity. The total system efficiency greatly depends on how the whole system is put together, controlled, and maintained. Each system needs to be judged on the specific goals for every project.

Question: What is an owner to do if only one manufacturer can provide the chiller that can meet the requirement, in accordance with the local authority having jurisdiction's (AHJ) adoption of Addendum ch?

  • J. Patrick Banse: Either accept or negotiate with the one manufacturer, or redesign the project chiller requirements for more competition.

Question: Must chiller manufacturers label their products as to how they comply with ASHRAE 90.1-2010?

  • J. Patrick Banse: Yes. Paragraph 6.4.1.5.1 of 90.1-2010 requires an equipment manufacturer to label the equipment stating compliance with ASHRAE Standard 90.1

Question: Do you have the option in ASHRAE 90.1-2010 to use ratings for standard or non-standard AHRI conditions? Or are you required to show compliance at actual design conditions?

  • J. Patrick Banse: You must show compliance with either the listed values in Table 6.8.1C for standard conditions or provide calculations for nonstandard conditions. The design conditions would be either at standard conditions (no calculations) or at nonstandard conditions requiring calculations.

Question: Which COMcheck edition applies for Addendum ch?

  • Jason Gerke: AHJs typically require the latest version of the program to be used. The best way to accomplish this is to use the online version of COMcheck which can be found at www.energycodes.gov.

Question: Do the requirements of ASHRAE 90.1 Addendum ch apply to process chillers as well as HVAC chillers?

  • Jason Gerke: Process equipment is exempt from the requirements of ASHRAE Standard 90.1. The standard only addresses the requirements for "mechanical equipment and systems serving the heating, cooling, ventilating, or refrigeration needs....".

Question: How are chiller efficiencies impacted by ASHRAE Standard 90.1-2013?

  • J. Patrick Banse: When Standard 90.1-2013 is adopted by the AHJ either directly or by reference, the chiller efficiencies in Table 6.8.1C are in effect and must be followed.

Question: Are heat recovery chillers are outside the scope of the AHRI certification program?

  • Jason Gerke: Heat recovery chillers are excluded from the AHRI 550 certification program. These chiller efficiencies are calculated by the equipment manufacturers following their own internal guidelines. Comparison of these chillers at AHRI standard conditions would provide little benefit to the engineer. This equipment should always be selected on a project system by system basis.


Engineers' Choice Awards
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by Control Engineering subscribers.
System Integrator Giants
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
System Integrator of the Year
Each year, a panel of Control Engineering and Plant Engineering editors and industry expert judges select the System Integrator of the Year Award winners in three categories.
Design of Safe and Reliable Hydraulic Systems for Subsea Applications
This eGuide explains how the operation of hydraulic systems for subsea applications requires the user to consider additional aspects because of the unique conditions that apply to the setting
How to Maximize Factory Automation Efficiency with Low Cost Machine Vision
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Wireless Reliability in Harsh Environments
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
October 2018
HMI hardware evolution, Data acquisition strategies, Matching motors and drives, Machine vision advice
September 2018
Optimize controls via cloud software, ladder logic simulation, industrial wireless best practices
August 2018
Augmented reality and virtual reality education, autotuning PID control, cybersecurity advice, educating engineers
Edge Computing
This article collection contains several articles on how today's technologies heap benefits onto an edge-computing architecture such as faster computing, better networking, more memory, smarter analytics, cloud-based intelligence, and lower costs.
Data Center Design
Data centers, data closets, edge and cloud computing, co-location facilities, and similar topics are among the fastest-changing in the industry.
IIoT: Machines, Equipment, & Asset Management
Articles in this digital report highlight technologies that enable Industrial Internet of Things, IIoT-related products and strategies.
SIDB

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

October 2018
2018 Product of the Year; Subsurface data methodologies; Digital twins; Well lifecycle data
August 2018
SCADA standardization, capital expenditures, data-driven drilling and execution
June 2018
Machine learning, produced water benefits, progressive cavity pumps
John O. Ayuk, PE, CFSE, PMP, CAP
Automation Engineer; Wood Group
Doug Baker
System Integrator; Cross Integrated Systems Group
Jose S. Vasquez, Jr.
Jose S. Vasquez, Jr.
Fire & Life Safety Engineer; Technip USA Inc.
Data Centers: Impacts of Climate and Cooling Technology
This course focuses on climate analysis, appropriateness of cooling system selection, and combining cooling systems.
Safety First: Arc Flash 101
This course will help identify and reveal electrical hazards and identify the solutions to implementing and maintaining a safe work environment.
Critical Power: Hospital Electrical Systems
This course explains how maintaining power and communication systems through emergency power-generation systems is critical.
Engineers' Choice Awards
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by Control Engineering subscribers.
System Integrator Giants
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
System Integrator of the Year
Each year, a panel of Control Engineering and Plant Engineering editors and industry expert judges select the System Integrator of the Year Award winners in three categories.
Design of Safe and Reliable Hydraulic Systems for Subsea Applications
This eGuide explains how the operation of hydraulic systems for subsea applications requires the user to consider additional aspects because of the unique conditions that apply to the setting
How to Maximize Factory Automation Efficiency with Low Cost Machine Vision
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Wireless Reliability in Harsh Environments
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
October 2018
HMI hardware evolution, Data acquisition strategies, Matching motors and drives, Machine vision advice
September 2018
Optimize controls via cloud software, ladder logic simulation, industrial wireless best practices
August 2018
Augmented reality and virtual reality education, autotuning PID control, cybersecurity advice, educating engineers
Edge Computing
This article collection contains several articles on how today's technologies heap benefits onto an edge-computing architecture such as faster computing, better networking, more memory, smarter analytics, cloud-based intelligence, and lower costs.
Data Center Design
Data centers, data closets, edge and cloud computing, co-location facilities, and similar topics are among the fastest-changing in the industry.
IIoT: Machines, Equipment, & Asset Management
Articles in this digital report highlight technologies that enable Industrial Internet of Things, IIoT-related products and strategies.
SIDB

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

October 2018
2018 Product of the Year; Subsurface data methodologies; Digital twins; Well lifecycle data
August 2018
SCADA standardization, capital expenditures, data-driven drilling and execution
June 2018
Machine learning, produced water benefits, progressive cavity pumps
John O. Ayuk, PE, CFSE, PMP, CAP
Automation Engineer; Wood Group
Doug Baker
System Integrator; Cross Integrated Systems Group
Jose S. Vasquez, Jr.
Jose S. Vasquez, Jr.
Fire & Life Safety Engineer; Technip USA Inc.
Data Centers: Impacts of Climate and Cooling Technology
This course focuses on climate analysis, appropriateness of cooling system selection, and combining cooling systems.
Safety First: Arc Flash 101
This course will help identify and reveal electrical hazards and identify the solutions to implementing and maintaining a safe work environment.
Critical Power: Hospital Electrical Systems
This course explains how maintaining power and communication systems through emergency power-generation systems is critical.
Engineers' Choice Awards
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by Control Engineering subscribers.
System Integrator Giants
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
System Integrator of the Year
Each year, a panel of Control Engineering and Plant Engineering editors and industry expert judges select the System Integrator of the Year Award winners in three categories.
Design of Safe and Reliable Hydraulic Systems for Subsea Applications
This eGuide explains how the operation of hydraulic systems for subsea applications requires the user to consider additional aspects because of the unique conditions that apply to the setting
How to Maximize Factory Automation Efficiency with Low Cost Machine Vision
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Wireless Reliability in Harsh Environments
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
October 2018
HMI hardware evolution, Data acquisition strategies, Matching motors and drives, Machine vision advice
September 2018
Optimize controls via cloud software, ladder logic simulation, industrial wireless best practices
August 2018
Augmented reality and virtual reality education, autotuning PID control, cybersecurity advice, educating engineers
Edge Computing
This article collection contains several articles on how today's technologies heap benefits onto an edge-computing architecture such as faster computing, better networking, more memory, smarter analytics, cloud-based intelligence, and lower costs.
Data Center Design
Data centers, data closets, edge and cloud computing, co-location facilities, and similar topics are among the fastest-changing in the industry.
IIoT: Machines, Equipment, & Asset Management
Articles in this digital report highlight technologies that enable Industrial Internet of Things, IIoT-related products and strategies.
SIDB

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

October 2018
2018 Product of the Year; Subsurface data methodologies; Digital twins; Well lifecycle data
August 2018
SCADA standardization, capital expenditures, data-driven drilling and execution
June 2018
Machine learning, produced water benefits, progressive cavity pumps
John O. Ayuk, PE, CFSE, PMP, CAP
Automation Engineer; Wood Group
Doug Baker
System Integrator; Cross Integrated Systems Group
Jose S. Vasquez, Jr.
Jose S. Vasquez, Jr.
Fire & Life Safety Engineer; Technip USA Inc.
Data Centers: Impacts of Climate and Cooling Technology
This course focuses on climate analysis, appropriateness of cooling system selection, and combining cooling systems.
Safety First: Arc Flash 101
This course will help identify and reveal electrical hazards and identify the solutions to implementing and maintaining a safe work environment.
Critical Power: Hospital Electrical Systems
This course explains how maintaining power and communication systems through emergency power-generation systems is critical.
click me