●A Case of Utilizing Results

Movement towards the revisionof energy saving standards forbuildings
NISHIYAMA Isao (Dr. Eng.), HeadBuilding Department
ASHIE Yasunobu (Dr. Eng.), HeadNISHIZAWA Shigeki (Dr. Eng.), Senior Researcher
Building Department, Environmental and Equipment Standards Division(Key words) building, state of energy consumption, energy saving standards
1. Introduction
Carbon dioxide emissions from buildings used as
offices, stores, schools, hospitals etc. increased 31.2%
since 1990 (as of 2009). And further countermeasures
are required as with residential buildings. In response,from 2008 to 2010, the NILIM conducted “Researchon a Comprehensive Evaluation Method and Design
Method Related to Energy Conservation Performanceof Non-residential Buildings”, researched energy
consumption of buildings and equipment systems
according to the way they are used, and studied energy
consumption estimation methods based on actualperformance.

0.9

0.6
0.5
0.4
0.3
0.2
0.1
0

Heat
熱源source (HS)

熱源+搬送
HS+ Heat supply (HS)
熱源+搬送+AHU
HS+ HS + AHUWhite: operated previous day
白抜き：前日稼働,Colored: not operated
previous day
塗りつぶし：前日非稼働

During
暖房時
heating

0.802

4 6 8 10 12 14 16Daily averageoutdoor temperature (°C)
日平均外気温[℃]

Air-conditioning(heat-sourceand heat supply)
空調(熱源・搬送)

Lighting
照明

0.7

Elevator
昇降機

0.6
0.5
0.4
0.3
0.1

熱源機
熱源+補機
熱源+補機+搬送
HS+ AE + HS + AHU
熱源+補機+搬送+AHU
Heat source (HS)

0.2
0-2

3. Towards the revision of energy saving standards
for buildings
Energy saving standards for buildings, which havebeen assessed based on the Perimeter Annual Load(PAL) and the Coefficient of Energy Consumption(CEC), are now being studied with their revisionscheduled for 2012. Under the new standards, amethod of assessing the envelope and opening
performance of buildings and of equipment systems(air-conditioning, ventilation, lighting, hot watersupply, elevators (Fig. 2)) based on the primary energy
consumption of the whole building will be introduced.
This assessment method, which will be made an
obligation in the future, is based on concepts similar to
the assessment method already introduced byStandards of Judgment for Residential Construction

White:
operated previous day
白抜き：前日稼働
Colored: not operated previous
塗り潰し：前日非稼働
day

110.9
0.8
0.7

Primary energy efficiency [-]一次エネルギー効率[-]

Primaryenergy efficiency [-]一次エネルギー効率[-]2. Research on energy consumption of building
equipment
Energy consumption of buildings and equipment
varies greatly not only according to the configurationof equipment systems, but to the way the building isused. “Research on a Comprehensive Evaluation
Method and Design Method Related to Energy
Conservation Performanceof Non-residential
Buildings” analyzed past energy consumption datawith a focus on office buildings, and obtained detailed
data to prepare more precise models. Detailed data ofcentral air-conditioning systems (heat source, auxiliarymachinery, heat supply system) is measured, and thecharacteristics of each type of equipment and systemare examined (Fig. 1). Office automation equipment
and freezing and refrigerating equipment, which
generate air-conditioning load, were measured tomodel the relationship between the machines’
behavior, electric power consumption and heatproduction. For elevator and lighting, the usage
condition and power consumption were researched toprepare technical documents.

HS + Auxiliary equipment (AE)During
冷房時
cooling

HS + AE + Heat supply(HS)20222426283032
Daily averageoutdoor temperature (°C)
日平均外気温[℃]
Hot給湯
water supply

Figure 1. Results of Assessment of Efficiency
of an Air-conditioning System

Figure 2. Example of the Building andEquipment Systems Evaluated

●A Case of Utilizing Results
Clients.
[Reference]
1) Nishizawa et al.: Study on the Characteristics ofCentral Air-Conditioning Systems for Verifying
Monitoring Data, Proceedings of Conference ofthe Society of Heating, Air-Conditioning andSanitary Engineers of Japan, p.1311-1314, 2010