EA Credit 1: Optimize Energy Performance 1–19 Points Intent To

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试卷: EA 节能与大气[查看]
EA Credit 1: Optimize Energy Performance
1–19 Points

Intent
To achieve increasing levels of energy performance beyond the prerequisite standard to reduce environmental and economic impacts associated with excessive energy use.

Requirements
Select 1 of the 3 compliance path options described below. Project teams documenting achievement using any of the 3
options are assumed to be in compliance with EA Prerequisite 2: Minimum Energy Performance.
OPTION 1. Whole Building Energy Simulation (1–19 points)
Demonstrate a percentage improvement in the proposed building performance rating compared with the
baseline building performance rating. Calculate the baseline building performance according to Appendix G
of ANSI/ASHRAE/IESNA Standard 90.1-2007 (with errata but without addenda1) using a computer simulation
model for the whole building project. The minimum energy cost savings percentage for each point threshold is as
follows:
New Buildings; Existing Building Renovations ;Points
12% 8% 1
14% 10% 2
16% 12% 3
18% 14% 4
20% 16% 5
22% 18% 6
24% 20% 7
26% 22% 8
28% 24% 9
30% 26% 10
32% 28% 11
34% 30% 12
36% 32% 13
38% 34% 14
40% 36% 15
42% 38% 16
44% 40% 17
46% 42% 18
48% 44% 19

Appendix G of Standard 90.1-2007 requires that the energy analysis done for the building performance rating
method include all the energy costs associated with the building project. To achieve points under this credit, the
proposed design must meet the following criteria:
-- Compliance with the mandatory provisions (Sections 5.4, 6.4, 7.4, 8.4, 9.4 and 10.4) in Standard 90.1-2007 (with
errata but without addenda).
-- Inclusion of all the energy costs within and associated with the building project.
-- Comparison against a baseline building that complies with Appendix G of Standard 90.1-2007 (with errata but
without addenda). The default process energy cost is 25% of the total energy cost for the baseline building. If
the building’s process energy cost is less than 25% of the baseline building energy cost, the LEED submittal
must include documentation substantiating that process energy inputs are appropriate.
For the purpose of this analysis, process energy is considered to include, but is not limited to, office and general
miscellaneous equipment, computers, elevators and escalators, kitchen cooking and refrigeration, laundry
washing and drying, lighting exempt from the lighting power allowance (e.g., lighting integral to medical
equipment) and other (e.g., waterfall pumps).
Regulated (non-process) energy includes lighting (e.g., for the interior, parking garage, surface parking, façade, or
building grounds, etc. except as noted above), heating, ventilating, and air conditioning (HVAC) (e.g., for space
heating, space cooling, fans, pumps, toilet exhaust, parking garage ventilation, kitchen hood exhaust, etc.), and
service water heating for domestic or space heating purposes.
For this credit, process loads must be identical for both the baseline building performance rating and the
proposed building performance rating. However, project teams may follow the exceptional calculation
method (ANSI/ASHRAE/IESNA Standard 90.1-2007 G2.5) to document measures that reduce process loads.
Documentation of process load energy savings must include a list of the assumptions made for both the base and
proposed design, and theoretical or empirical information supporting these assumptions.
Projects in California may use Title 24-2005, Part 6 in place of ANSI/ASHRAE/IESNA Standard 90.1-2007 for Option 1.
OR
OPTION 2. Prescriptive Compliance Path: ASHRAE Advanced Energy Design Guide (1 point)
Comply with the prescriptive measures of the ASHRAE Advanced Energy Design Guide appropriate to the project
scope, outlined below. Project teams must comply with all applicable criteria as established in the Advanced
Energy Design Guide for the climate zone in which the building is located.
PAT H 1. ASHRAE Advanced Energy Design Guide for Small Office Buildings 2004
The building must meet the following requirements:
-- Less than 20,000 square feet.
-- Office occupancy.
PAT H 2. ASHRAE Advanced Energy Design Guide for Small Retail Buildings 2006
The building must meet the following requirements:
-- Less than 20,000 square feet.
-- Retail occupancy.
PAT H 3. ASHRAE Advanced Energy Design Guide for Small Warehouses and Self Storage Buildings
2008
The building must meet the following requirements:
-- Less than 50,000 square feet.
-- Warehouse or self-storage occupancy.
OR
OPTION 3. Prescriptive Compliance Path: Advanced Buildings™ Core Performance™ Guide
(1–3 points)
Comply with the prescriptive measures identified in the Advanced Buildings™ Core Performance™ Guide
developed by the New Buildings Institute. The building must meet the following requirements:
-- Less than 100,000 square feet.
-- Comply with Section 1: Design Process Strategies, and Section 2: Core Performance Requirements.
-- Health care, warehouse or laboratory projects are ineligible for this path.
Points achieved under Option 3 (1 point):
-- 1 point is available for all projects (office, school, public assembly, and retail projects) less than 100,000
square feet that comply with Sections 1 and 2 of the Core Performance Guide.
-- Up to 2 additional points are available to projects that implement performance strategies listed in Section 3,
Enhanced Performance. For every 3 strategies implemented from this section, 1 point is available.
-- The following strategies are addressed by other aspects of LEED and are not eligible for additional points
under EA Credit 1:
• 3.1 — Cool Roofs
• 3.8 — Night Venting
• 3.13 — Additional Commissioning

Potential Technologies & Strategies
Design the building envelope and systems to maximize energy performance. Use a computer simulation model to assess the energy performance and identify the most cost-effective energy efficiency measures. Quantify energy performance compared with a baseline building.
If local code has demonstrated quantitative and textual equivalence following, at a minimum, the U.S. Department of Energy (DOE) standard process for commercial energy code determination, the results of that analysis may be used to correlate local code performance with ANSI/ASHRAE/IESNA Standard 90.1-2007. Details on the DOE process for commercial energy code determination can be found at http://www.energycodes.gov/implement/determinations_com.stm.

EA C1: 能效优化
1–19分

目的
为减少能源使用带来的环境及经济影响，实现超过最低能效要求，进一步提高节能水平。

要求
选用以下3个达标方式之一，采用在“最低能效要求”项目中的三个选项给予论证。
选项 1. 全建筑能源模拟(1–19分)
采用ASHRAE90.1-2007附录G的方法，采用计算机模拟手段，进行全建筑模拟，说明设计建
筑相对基准建筑能效提高的比例程度。节能率（能源费用）的提高与得分标准见下表：
新建筑;既有建筑改造;得分
12% 8% 1
14% 10% 2
16% 12% 3
18% 14% 4
20% 16% 5
22% 18% 6
24% 20% 7
26% 22% 8
28% 24% 9
30% 26% 10
32% 28% 11
34% 30% 12
36% 32% 13
38% 34% 14
40% 36% 15
42% 38% 16
44% 40% 17
46% 42% 18
48% 44% 19

ASHRAE 90.1-2007附录G所规定的方法，要求覆盖建筑中所有的用能费用，设计建筑必须符
合以下标准才能得分：
-- 符合地ASHRAE 90.1-2007标准的所有强制性条款(第5.4, 6.4, 7.4, 8.4, 9.4和10.4节)。
-- 包括了与本建筑相关的所有能源费用。
-- 相对ASHRAE90.1-2007附录G的基准建筑予以比较，基准建筑的作业能耗默认为全部能耗
费用的25%，如果基准建筑的能耗计算费用少于全部能耗费用的25%，则必须在提交材料
中论证其能耗模拟输入是适合的。
为本分析之目的所关联的作业能耗包括（但不限于）：办公、相关设备、计算机、电梯和滚
梯、厨房设备、冷冻和冰箱、洗衣和干衣、灯具（不含设备附带灯具）和景观水泵。
常规用能（非作业能耗）包括照明（室内、车库、地面停车、建筑里面、地面等）、采暖、
通风、空调（室内采暖、制冷，风机，水泵，卫生间换气装置，车库通风，厨房油烟机等）、
和使用及采暖之目的的热水。
基准建筑与目标建筑都必须确定作业能耗水平，但也按ASHRAE 90.1-2007标准G2.5条的
例外计算方法，说明作业能耗的降低。说明作业能耗的节能，必须包括基准建筑与设计建
筑的估定清单，并提供理论或经验数据支持这些估定。
加州的工程可以采用标准Title 24-2005, 第6部分，以在选项1中代替ASHRAE 90.1-2007..
或者
选项 2. 规定性达标方式：ASHRAE高级能源设计指南
如下列要求，说明工程符合ASHRAE高级能源设计指南的规定性措施，对于建筑所在地区
的气候分区，工程必须满足所有适用条款。
方式1. ASHRAE高级能源设计指南—小型办公建筑2004
建筑必须符合以下要求:
-- 小于20,000平方英尺；
-- 办公用途；.
方式2. ASHRAE高级能源设计指南—小型零售建筑2006
建筑必须满足以下要求：
-- 小于20,000平方英尺；
-- 零售用途.
方式3. ASHRAE高级能源设计指南—小型仓库和自用储藏建筑2008
建筑必须满足以下要求：
-- 小于20,000平方英尺；
-- 仓库或自用储藏用途.
或者
选项3. 规定性达标方式：高级建筑™ 核心性能指南™
符合新建筑协会编制的高级建筑核心性能指南的规定性措施，建筑必须满足以下要求：
-- 小于100,000平方英尺；
-- 符合第1节: 设计策略，和第2节：核心性能要求；
-- 办公、学校、公共建筑和零售工程，小于100,000平方英尺，必须满足核心性能指南的
第1节和第2节；
-- 其它建筑形式，小于100,000平方英尺，必须满足核心性能指南的基本要求；
-- 健康中心、仓库和实验室工程适用于本方式。
选项3的得分（1分）:
-- 符合核心性能指南第2节的，小于100,000平方英尺的适合建筑可得1分（办公楼、学校、
公共及零售建筑）。
-- 负荷第3节增强“增强性能”所列的措施的建筑，最高可获得另外2个附加分，每采用3个措
施，可获得1分。
-- 采用以下LEED推荐的其它措施分布不能获得EAC1的附加分：
• 3.1 — 清凉屋面 Cool Roofs
• 3.8 — 夜间通风 Night Venting
• 3.13 — 附加运行调试 Additional Commissioning

技术措施和策略
建筑围护结构和系统要满足基准建筑的要求，采用计算机模拟方式评估能耗性能，并确定最大
经济性节能措施。对照基准建筑量化能耗性能。
如果地方规范可以被证明在要求及量值方面，与美国能源部的确定商业建筑能耗标准至少相当，
则采用地方规范中与ASHRAE 90.1-2007相关的能耗分析结果可能予以使用。美国能源部关于
商业建筑能耗确定标准，可见 http://www.energycodes.gov/implement/determinations_com.stm.