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Electric Power Consumption by Office Tenants (June 2013)
Consumption in spring, reduced by 15% from the pre-quake level (the areas covered by TEPCO) Xymax Real Estate Institute has been continuously studying the electric power consumption by tenants occupying office buildings in Japan. Our study results for January 2010–April 2013 were released in June 2013 (http://www.xymax.co.jp/english/research/release/20130621.html). This report is an update on the previous report, covering data up to June 2013. The monthly data (January 2010–June 2013) is available at the end of this report.
Definition of Electric Power Consumption by Office Tenants
The electric power per tsubo (3.3 sq m) consumed by tenants in office buildings in one month. Key Findings the areas covered by Tokyo Electric Power Company (TEPCO)
Outline Period January 2010 – June 2013 (monthly data) Subject data Of the office-use tenants occupying the office buildings in Japan under management by Xymax Group, the valid data (roughly 300 buildings, 3,000 tenants) was used as the sample data for this study. Calculation Method Calculate the monthly electric power consumption in kilowatt-hour (kWh) by tenant. 1) Adjust the outcome in 1) based on the ordinary business days of the week (Monday-Friday). 2) Calculate the electric power consumption per tsubo (approx. 3.3 sq m) by dividing the outcome in 2) 3) by the rentable area of the tenant space. Average the outcome in 3) by the areas covered by each electric power company. 4) Notes . . . . . Uses other than office use, such as retail, warehouse, and computer room are excluded from the subject data. Tenants in buildings with central air conditioning or gas heat pump where separate calculation of the energy use by tenant is impossible are excluded from the subject data. The month represents the month the electric power meter is read, usually on 20th of each month. Extraordinary amounts (too high, too low) are identified as outlier and excluded from the subject data. The number of subject tenants varies every month as tenants move in and out. Electric Power Consumption by Office Tenants (January 2010 – June 2013) Figure 1 shows the changes in electric power consumption from January 2010 to June 2013 by tenants in office buildings in the areas covered by TEPCO. The amount was 32.6 kWh/tsubo in April 2013, 36.3 kWh/tsubo in May, and 35.6 kWh/tsubo in June. Figure 1: Electric Power Consumption by Office Tenants (January 2010 – June 2013) Electric power consumption in spring 2013 (April-June) is down by more than 15% since pre-quake level The electric power consumed by office tenants in spring (the April-June average) after the earthquake shows decrease of over 15%: 41.9 kWh/tsubo in 2010, 34.3 kWh/tsubo in 2011 (down 18.1% from 2010), 34.7 kWh/tsubo in 2012 (down 17.2% from 2010), and 34.8 kWh/tsubo in 2013 (down 16.9% from 2010) (See Figure 2). In general the electricity load of air conditioning is low in spring but even so the electric power consumption in spring was reduced by over 15% compared to that in pre-quake 2010, meaning that apparently the energy is saved not only in the air conditioning machines but also in other devices in office spaces such as lighting, computers, and copying machines. Before 3.11 earthquake After 3.11 earthquake The information contained in this report is as of the date of preparation. XYMAX accepts no liability for any inaccuracies or omissions in this report. No copying, quoting, forwarding, distributing, reprinting or any other use of this report is allowed. Copyright © 2013 XYMAX Corporation. All rights reserved. Monthly Electric Power Consumption by Office Tenants and Temperature (January 2010 – June 2013)
The information contained in this report is as of the date of preparation. XYMAX accepts no liability for any inaccuracies or omissions in this report. No copying, quoting, forwarding, distributing, reprinting or any other use of this report is allowed. Copyright © 2013 XYMAX Corporation. All rights reserved.
Average temperature: Website of the Meteorological Agency (http://www.data.jma.go.jp/obd/stats/etrn/index.php) The information contained in this report is as of the date of preparation. XYMAX accepts no liability for any inaccuracies or omissions in this report. No copying, quoting, forwarding, distributing, reprinting or any other use of this report is allowed. Copyright © 2013 XYMAX Corporation. All rights reserved. Reference: Distribution and Average of Electric Power Consumption by Office Tenants The upper graph is for January-March 2013, and the lower graph is for April-June 2013. The horizontal axis represents the electricity (kWh/tsubo), and the vertical axis represents the ratio of tenants. As shown, the distribution differs by seasons of the year. In our study, the average is applied. The information contained in this report is as of the date of preparation. XYMAX accepts no liability for any inaccuracies or omissions in this report. No copying, quoting, forwarding, distributing, reprinting or any other use of this report is allowed. Copyright © 2013 XYMAX Corporation. All rights reserved.