Home Energy Report Pilot: Large-scale look at consumer behavior in Japan

Transcription

1 BECC 2016 Conference JYUKANKYO RESEARCH INSTITUTE INC. Home Energy Report Pilot: Large-scale look at consumer behavior in Japan 21 Octorber 2016 Renaissance Baltimore Harborplace Hotel Sho Hirayama Jyukankyo Research Institute Inc.

2 Residential Energy Consumption in Japan Other Water Heating Space Heating Space Cooling 95 Less Than Half 45 10% Down 40 US (2009) Japan (2010) Japan (2014) Final Energy Use per Household (GJ/year) (Source) U.S. Energy Information Administration, Residential Energy Consumption Survey. Japan: Jyukankyo Research Institute Inc., "Residential Energy Statistics Yearbook" Japanese household use less than half of energy compare to US in After Fukushima accident, that decreased by 10% via voluntary consumer behaviors. Is Home Energy Report (HER) still effective even in Japan? 1

3 Outline of the Study Random Assignment (min-max t-statistic randomization method) Target Population Intervention Dec Jan Treatment (20,600ss) Control (20,600ss) Mail HERs Based on Electricity Usage Data No Report Usage Comparison Dec Feb kwh kwh kwh Treatment Treatment Effect kwh Control Impact Evaluation via Randomized Control Trial (RCT) 1 41,200 households were randomly assigned to treatment and control groups. 2 HERs were mailed twice to the treatment group during winter. 3 Saving impact was analyzed by comparing electricity usage across both groups. Telephone Survey Feb Treatment (1,000ss) Control (500ss) 4 EE awareness and behaviors were measured via a phone survey. 2

4 Neighbor Comparison in Japanese Version HER Mostly same as US, smiley faces are modified 3

5 Energy Efficiency Tips Used in Hokuriku Pilot 6 tips are selected for Hokuriku s winter A modern Japanese kotatsu (Source) Close window shades to prevent cold air Use energy-efficient light bulbs Set the temperature of heating appliances relatively low 4

6 Estimated Program Savings Impact Monthly Savings Rate (with 95% confidence interval) 2.0% 1.5% 1.0% 0.5% 0.0% 0.4% 0.0% 0.9% after 1 month 1.2% 0.9% 0.6% 1.2% after 2 months 1.5% 1.2% 0.9% -0.5% -0.3% December-15 January-16 February-16 (1 st HER mailed) (After 1 month) (After 2 months) Note: Monthly Savings Rate (%) = Decrease rate of Treatment group s electricity usage compare to control group calculated via Panel Data Regression Analysis. 5

7 Comparison of EE impact in Hokuriku with Other Opower s programs Monthly Savings Rate 3.5% 3.0% 2.5% 2.0% 1.5% 1.0% 0.5% 0.0% -0.5% Hokuriku Consumers Respond more Quickly than others Hokuriku we would expect 1.5~2% range by the second year North America Europe Asia Program Age (months) Hokuriku consumers respond more quickly than other programs. If the program were to continue, we would expect steady savings in at least the 1.5~2% range by the second year. 6

8 Energy Efficiency Behaviors Frequency Close window shades to prevent cold air カーテンを閉めて冷気遮断 39% 58% 22% 12% +9% ** Set the temperature of heating appliances relatively low 暖房器具の設定温度を低めに 45% 38% 15% 23% Turn off electronics with a tapped switch スイッチ付タップで家電のスイッチを切る 31% 29% 11% 15% Use energy-efficient light bulbs 省エネ型の照明を使用 28% 20% 14% 18% +4% * Cover the gap under windows / doors to prevent draft 窓やドアまわりのすき間をふさぐ Adjust the refrigerator temperature 冷蔵庫の設定温度調節 24% 22% 19% 17% 7% 10% 8% 10% Always - 5 Most of the time- 4 Note: ** P<0.05, * P< 0.1 0% 10% 20% 30% 40% 50% 60% 70% 80% HERs Recipients have a high frequency of all EE Behaviors compared to Controls. 7

9 Energy Efficiency Attitudes I know monthly electricity bill for my home ご家庭の月々の電気料金がどの程度か把握してい る 76% 72% 12% 15% It s important to be that my home is energy efficient 自分の住まいを省エネにすることは大切だ 56% 48% 21% 24% +5% * I am usually conscious about saving energy at home 日ごろからご家庭で省エネを意識している 36% 31% 25% 27% I want to be better at saving energy もっと省エネ上手になりたい 36% 28% 21% 24% +6% ** ご家庭で省エネにつながる取り組みをしている I am doing something to save energy at home 省エネ効果があるのなら多少の出費や手間をかけても構わない I would spend some money or do something for energy saving 21% 17% 19% 12% 19% 23% 14% 20% Strongly Agree - 5 Agree- 4 Note: ** P<0.05, * P< 0.1 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% HERs Recipients strongly agreed to all EE Attitudes compared to Controls. HERs improved the frequency of EE behaviors and Attitudes. 8

10 Conclusions & Recommendations Conclusions HERs recipients (treatment group) lowered their usage 1.2% on average compared to control group. HERs improved the frequency of EE Behaviors & EE attitudes. Future Issues Continued Measurement of Long-Term Impact of Behavioral EE Programs. Evaluating Impact in other parts of Japan and other seasons. Thank you! 9

11 Acknowledgment This study ( 2015 Research Report on the Effects of Energy- Usage Information Provision on Residential Behavioral Energy Efficiency ) was commissioned by the Japanese Ministry of Economy, Trade & Industry (METI) and carried out jointly by Jyukankyo Research Institute, Inc., Opower Japan, and Hokuriku Electric Power Company. The full report (Japanese) can be found here: 10