ASHRAE Journal - August 2023 - 35
TECHNICAL FEATURE
FIGURE 4 Available energy credits by building and measure type vs. required credits
Possible Energy Credits by Type, Average All Climate Zones
400
350
300
250
200
150
100
50
Offi ce
Envelope
50 Point (5%) Cap on Credit Requirement
to the grouping of multiple climate
zone selections into the hot, moderate
and cold climate groups.
* Minimum Equipment EfRetail
HVAC
SWH Lighting
Education Restaurant Multifamily Hotel
Equipment
points from different measure types for each building
use type are compared with the 50-point cap on credit
requirements in Figure 4. Generally, the available credit
points are much greater than the requirement.
Energy Credit Application Guide
To demonstrate the range of options available to meet
the requirement, an " Application Guide " 3 has been
developed that includes general information about
meeting the energy credit requirements in Standard
90.1-2022. Example packages are shown for hot, moderate
and cold climates demonstrating nine alternative
ways to meet the energy credit requirements for each
building use type. There is also a general description
of all energy credit measures, including how they save
energy or reduce electric grid costs and their general
applicability.
In the " Application Guide, " several sample packages
have been developed for each combination of building
type and climate zone group. The goal is to demonstrate
a range of combinations that can reasonably meet the
credit requirements. Here are descriptions of the sample
packages:
* Cost-Effective Base Demonstration Package. In
a previous analysis,2 cost-effective packages of energy
credit measures were established for each building type
and climate zone. The objective of that analysis was to
help guide the determination of energy credit point
requirements. Those packages are the basis for the costeffective
base demonstration package in the " Application
Guide. " 3 In some cases, there are slight differences due
Renewable
Medical Warehouse
Load Manage
fi ciency Demonstration Package.
This package was developed to show
a reasonable achievement of the
required energy credits without using
effi ciency improvements for HVAC
and service water heating (SWH)
equipment subject to The Energy Policy
Act6 minimum federal effi ciencies.
This package was selected by using
reasonable measures with the same
goal of 5% savings; however, HVAC
and service water heating effi ciency
measures (H02, H03, W02, W03) are not included.
* Prototype Measure Packages. A separate package
of measures was developed for each of the prototype
models that are used to capture the impact of the energy
credits as part of PNNL's analysis of the savings of Standard
90.1-2022 compared to Standard 90.1-2019. This
package of energy credits is based on the cost-effective
demonstration package but has several changes that
were made to facilitate accurate modeling. The exact
measures included in the prototype simulations will
be documented in a future Standard 90.1-2022 energy
analysis technical report.
* Alternative Measure Packages. Six additional alternative
packages are included for each building type
and climate to demonstrate different possible ways to
meet the prescriptive energy credit requirements. Not
all of the alternative packages were applied to every
building type and climate . In general, each package has
a focus on the measures related to the package title, but
there may be additional unrelated measures needed to
meet the total energy credit requirements. Alternate
packages include:
* Maximizing renewable PV installation;
* Maximizing service hot water effi ciency;
* Lighting reduction focus (warehouse only);
* Ground source heat pump implementation (all
building types except warehouse);
* Maximizing control improvements;
* Maximizing HVAC effi ciency improvements;
* Cooling storage system with improved cooling
effi ciency (only used for hot and moderate climates);
A U G U S T 2 0 2 3 ashrae.o rg ASHRAE JOURNAL
35
Energy Credits 10 = 1% Energy Cost Savings
https://ashrae.org/
ASHRAE Journal - August 2023
Table of Contents for the Digital Edition of ASHRAE Journal - August 2023
ASHRAE Journal - August 2023 - Intro
ASHRAE Journal - August 2023 - Cover1
ASHRAE Journal - August 2023 - Cover2
ASHRAE Journal - August 2023 - 1
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