Energy Standard for Buildings | Standards Michigan

Energy Standard for Buildings

Building interior environmental air systems are one of the most heavily regulated technologies. This stream tracks the development of the most widely referenced consensus documents for energy conservation legislation.

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Energy Standard for Buildings

July 19, 2018
mike@standardsmichigan.com
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North Dakota State University

ASHRAE International has released several addenda to its widely adopted standard ASHRAE 90.1  Standard 90.1-2016, Energy Standard for Buildings Except Low-Rise Residential Buildings, several of which will affect the design, construction and operation of education facilities.

Addendum ao

A fan efficiency metric, called Fan Energy Index (FEI), was developed by manufacturer trade associations working collaboratively with efficiency advocates and DOE. FEI is defined in the calculation standard.  FEI is a ratio of electrical input powers that accounts for the electrical and mechanical losses upstream of the impeller shaft compared to a reference fan. The reference fan’s electrical input power is the numerator of the ratio, and the subject fan’s electrical input power is the denominator. The lower the subject fan’s electrical input power, the higher the FEI rating. FEI is a wire-to-air metric that considers losses of motors, variable speed drives, belts, etc., and FEI differentiates selections based on fan static pressure from selections based on fan total pressure.

Addendum ap

HVAC systems with simultaneous heating and cooling require supply air temperature (SAT) reset except in climate zones 0A through 3A. In these climate zones, several system types can successfully dehumidify the outside air while still providing SAT reset and reducing reheat energy use. Supply temperature reset saves significant heating energy in VAV reheat systems in high outside air systems, and that savings is higher in climate zone 3A than 2A, 1A and 0A. Separately dehumidifying the outside air reduces the total volume of air that must be cooled, significantly reducing cooling energy use in all the warm and humid climate zones

Addendum aq

Significant changes to Chapter 9 – Lighting Control

Addendum m

Table G3.1 Modeling Requirements for Calculating Proposed and Baseline Building Performance

Addendum z

Calculation of Design Energy Cost and Energy Cost Budget

Comments due July 29th.  There is another batch of addenda that span across several sections of content which we may cover in a future post.   Those addenda are due August 13th.  You may key in your comments directly to ASHRAE at the link below:

Online Standards Actions & Public Review Drafts

ASHRAE is an ANSI-accredited continuous-maintenance standards developer (what we call a regulatory product development “stream”).  Technical committees developing ASHRAE 90.1 release public review documents in 30-to-90 day intervals and also meet face-to-face twice a year at ASHRAE Conferences; the next one in Atlanta, Georgia January 14-16 2019.   We encourage education facility professionals in within driving distance of this conference to attend the ASHRAE 90.1 technical meetings.

All ASHRAE standards are a standing item on our weekly Open Door teleconferences every Wednesday, 11 AM Eastern time.  CLICK HERE to log in.  We will also host a dedicated markup session for mechanical engineering standards on July 24th, 11:00 AM during which time we will examine and markup documents released for public review by ASHRAE, ASME, AWWA, IAMPO and other organizations developing documents for incorporation by reference into public safety law.

 

Issue: [Various]

Category: Mechanical, Electrical, Energy, Facility Asset Management, US Department of Energy

Colleagues: Richard Robben, Larry Spielvogel

Link to ANSI Standards Action Public Review | PDF Pages 30-55


Posted April 24, 2018

 

University of Houston

ASHRAE International has released several addenda to its widely adopted standard ASHRAE 90.1  Standard 90.1-2016, Energy Standard for Buildings Except Low-Rise Residential Buildings, several of which will affect the design, construction and operation of education facilities.  Two addenda have been released following the ASHRAE Winter 2018 Conference a few weeks ago.   The topical considerations of the redlines are summarized below:

Addendum ak: Revisions to Tables in Appendix G regarding solar heat gain coefficients in assembly spaces according to climatic zone.

Addendum bg:   A Simplified Building Method intended to provide a simple approach for contractors and designers who design or renovate office, school and retail buildings up to 25,000 ft2

Comments are due April 23rd.  You may key in your comments directly to ASHRAE at the link below:

Online Standards Actions & Public Review Drafts

Technical committees developing ASHRAE 90.1 typically meet face-to-face twice a year at ASHRAE Conferences; the next one in Houston Texas, June 23 through 27.   We encourage education facility professionals in within driving distance of this conference at least attend the ASHRAE 90.1 technical meetings.

All ASHRAE standards are a standing item on our weekly Open Door teleconferences every Wednesday, 11 AM Eastern time.  Click here to log in.

 


March 26, 2018

Harvard University

ASHRAE International has released several addenda to its widely adopted standard ASHRAE 90.1  Standard 90.1-2016, Energy Standard for Buildings Except Low-Rise Residential Buildings, several of which will affect the design, construction and operation of education facilities.  Two batches of addenda have been released following the ASHRAE Winter 2018 Conference a few weeks ago.   The topical considerations of the redlines are summarized below:

Addendum ac: Definitions

Addendum ad: Compliance paths

Addendum ai: Commissioning and functional testing cost 

Addendum q: Reorganization of Section 5  

Comments are due March 26th.  You may key in your comments directly to ASHRAE at the link below:

Online Standards Actions & Public Review Drafts

The ASHRAE suite of standards is a standing item on our weekly Open Door teleconferences every Wednesday, 11 AM Eastern time.  Click here to log in.

 


September 20, 2017

The New School | Manhattan

ASHRAE International has released several addenda to its widely adopted standard ASHRAE 90.1  Standard 90.1-2016, Energy Standard for Buildings Except Low-Rise Residential Buildings, several of which may affect the design, construction and operation of education facilities:

Addendum AA

The purpose of this addenda is to resolve possible confusion on the applicability of controls to the listed lighting equipment and applications in the exceptions to 9.2.2.3 (Interior Lighting Power Densities) and to ensure that the control requirements called out in the lighting power densities exceptions list are specifically spelled out in the controls section. This will improve compliance and prevent users from missing a control requirement.

Addendum G

Summary of independent substantive changes:

• An editorial change is made in the definition of “occupied-standby mode” to avoid confusion with the definition of population.

• Occupied Standby Controls is moved from the mandatory section to the prescriptive section so anyone who does not want to implement occupied standby controls can use the performance compliance approach.

• Clarification was added that the procedure only applies when using Standard 62.1’s Ventilation Rate Procedure since the reference to spaces that can be unventilated in standby mode is in the Standard 62.1 VRP Table. If natural ventilation alone is used or the IAQ Procedure is used to calculate ventilation rates, this section does not apply.

Addendum V

Most hospitals use reheat HVAC systems with simultaneous heating and cooling. Even with required air or water economizers, there are many hours with simultaneous heating and cooling use. It is generally lower cost and consumes less site and source energy to generate heating water and chilled water with a heat recovery chiller (aka heat pump chiller) than it is to use separate boilers that comply with 90.1. Evaluation of a typical hospital in multiple climate zones shows a potential for reasonable recovery with a heat recovery chiller that is sized between 7% and 12% of the cooling plant peak load, depending on climate zone. For simplification, the minimum is set at 7% of total cooling load across the board in this proposal. An economic analysis was made using the 90.1 scalar method based on installed heat recovery chiller costs of $1,800 per ton. The resulting scalars were all under 10 years for required climate zones vs. a scalar limit of 13 years. The trend of higher savings in warmer climate zones was used to include climate zones 1 and 0 without specific analysis. The payback in Climate Zone 2B was under 5 years.

Addendum W

Significant energy and water savings could accrue nationwide if these revised flowrates for showerheads and faucets are adopted. At the levels in the addendum, all fixtures except kitchen faucets match the WaterSense specifications, so they are readily identifiable and available in the market place. The proposal provides the following reductions in maximum flow when compared to the Uniform Plumbing Code and International Plumbing Code that both have the same flow limits

Addendum Y

The rules in Appendix G are ambiguous with regards to how sizing runs are performed. The current edition allows the use of either annual historic weather files or 99.6% design day heating and 1% dry bulb and wet-bulb cooling design temperatures. It is also silent on what diversity schedules to use for internal gains. Leaving these choices up to the user means that the stringency of the baseline can vary significantly which should be avoided. This proposal fixes those parameters so that they are modeled using the same approach by all modeling teams. The proposal clarifies that plant sizing is based on coincident loads

Comments are due October 1st.   ASHRAE invites anyone to comment on the development of ASHRAE 90.1 on its Online Standards Action & Public Review Draft page.  (Click here).

We will place these on the agenda of our regular Wednesday, 11 AM Eastern Time, Open Door teleconference.  Anyone is welcomed to join these teleconferences with the login information below:

https://global.gotomeeting.com/join/718914669

You can also dial in using your phone. United States : +1 (408) 650-3123 Access Code: 718-914-669

 

 


August 14, 2017

Arkansas State University

ASHRAE International has released several addenda to its widely adopted standard ASHRAE 90.1  Standard 90.1-2016, Energy Standard for Buildings Except Low-Rise Residential Buildings, several of which may affect the design, construction and operation of education facilities:

Addendum M

When Addendum bm to Standard 90.1-2013 was developed it set baseline requirements in Appendix G approximately equal to the stringency of the 2004 Standard. Rules for modelling infiltration were developed in parallel to Addendum bm and included proposed building infiltration at 0.4 cfm/ft2 of the building envelope at a fixed building pressure differential of 0.3 in. of water. However the strategy of setting baseline requirements at the 2004 level was omitted and baseline infiltration was set same as the proposed building. This proposed change addresses that oversight by adding a requirement that the baseline include infiltration at 0.8 cfm/ft2 greater than that assumed for a building compliant with the 2013 Standard. This addendum impacts an optional performance path in the standard designed to provide increased flexibility and therefore was not subjected to cost effectiveness analysis

Indiana Wesleyan University

Addendum N

This addendum deletes (or modifies the terminology of) obsolete definitions that are no longer in use or necessary in ASHRAE 90.1. This addendum does not affect the energy use of the standard and has no economic impact.

Addendum S

The following change is required in order to capture the 5% limit on renewable energy proposed for Appendix G compliance. Using this formula allows the PCI to always reflect the actual building design without any adjustment for renewable energy contribution. Instead the PCI is adjusted such that it reflects the limit on renewable energy.  This addendum also clarifies for both Section 11 and Appendix G which renewable systems are eligible. This addendum impacts an optional performance path in the standard designed to provide increased flexibility and therefore was not subjected to cost effectiveness analysis.

University of Texas Antonio

Addendum T

This proposed addendum expands the exterior LPD application table to cover additional exterior spaces that are not currently in the exterior LPD table. The expansion references appropriate space types found in the interior LPD table with appropriate modifications of the value that recognizes the lower need for lighting power and illumination in exterior applications.  This addendum will advance energy savings by providing an appropriate LPD value for exterior applications where one did not exist before which potentially allows for either exemption or the use of a higher than appropriate value. This addendum has no cost increase because it only applies existing requirements to additional spaces and applications

Addendum U

This proposed addendum applies existing parking lot and other exterior lighting requirements (where applicable) to exterior lighting that is associated with and tied to a building as it is powered from electrical service on the building site.  This addendum will advance energy savings by providing appropriate LPD limits primarily to parking lots that are constructed and/or renovated as part of a building site to support the building in the same manner as current requirements in 90.1.   This addendum has no cost increase because it only applies existing requirements to additional spaces and applications

University of Utah Hospital

Comments are due August 27th.   ASHRAE invites anyone to comment on the development of ASHRAE 90.1 on its Online Standards Action & Public Review Draft page.  (Click here).   We will place these on the agenda of our regular Wednesday, 11 AM Eastern Time, Open Door teleconference.  Anyone is welcomed to join these teleconferences with the login information below:

https://global.gotomeeting.com/join/718914669

You can also dial in using your phone. United States : +1 (408) 650-3123 Access Code: 718-914-669

 

 

 

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