338
emissions from seawater-source heat pumps in heating mode are less than those
from air-source heat pumps, the difference was small, while project emissions were
larger than the difference due to CO 2 emissions from the installed heat-source water
pump.
Future Tasks Facility personnel manually controlled and recorded the operation
time for the power consumption of the heat pump. This was done because an emphasis was placed on simplicity, and we adopted a method allowing calculation within
the range of monitoring currently being carried out. However, to improve the calculation accuracy of the CO 2 emission reduction amount, it is desirable to monitor the
power automatically with a watt meter.
12.4.3 Implementation of the Social Experiment
In an agreement with the triathlon committee, the CO 2 emitted when a participant
traveled from home to the convention site was offset (64.9% of the participants
agreed to pay to offset). The organizer agreed to pay to offset the CO 2 (about
1.6 tonnes) emitted by the use of electricity at the venue. Trading of carbon credit
were made directly between the credit creator (Yokohama City Fishery Cooperative
Association and Yokohama Hakkeijima Inc.) and the credit user (Yokohama Seaside
Triathlon), and Yokohama City conducted certification and issuance of certificates
for the credit (Fig. 12.2). Carbon offset in this social experiment was implemented
by buying and selling only Yokohama Blue Carbon Credit, and the unit price of
trading was set at 10,000 yen/tonne CO 2 (excluding tax).
12.4.4 Issues and Future Tasks for the Social Experiment
To assess the outcomes of and problems with the social experiment, Yokohama City
conducted a questionnaire survey of visitors to exhibition booths and triathlon participants on the day of the event. Of the visitors surveyed, 30.1% recognized
Yokohama Blue Carbon (Fig. 12.7). Of the race participants, 40.5% said they agreed
to pay to offset because “I want to contribute to the prevention of global warming”
and 32.4% responded “I want to improve the environment of the city” (Fig. 12.8).
Although the awareness of blue carbon was still low, the visitors and participants
showed interest in environmental issues.
To improve recognition of the Yokohama Blue Carbon Project, Yokohama City
ran a seaweed tasting booth on the day of the event. Also, the Carbon Offset
Certificate award ceremony was held at the Third International Blue Carbon
Symposium in Yokohama in January 2015. Here, the mayor of Yokohama gave a
Carbon Offset Certificate to the Yokohama Seaside Triathlon Convention Executive
Committee, which purchased carbon offset credits, and a letter of appreciation was
given to the credit creators, Yokohama City Fishery Cooperative and Yokohama
Hakkeijima Inc.
M. Nobutoki et al.
emissions from seawater-source heat pumps in heating mode are less than those
from air-source heat pumps, the difference was small, while project emissions were
larger than the difference due to CO 2 emissions from the installed heat-source water
pump.
Future Tasks Facility personnel manually controlled and recorded the operation
time for the power consumption of the heat pump. This was done because an emphasis was placed on simplicity, and we adopted a method allowing calculation within
the range of monitoring currently being carried out. However, to improve the calculation accuracy of the CO 2 emission reduction amount, it is desirable to monitor the
power automatically with a watt meter.
12.4.3 Implementation of the Social Experiment
In an agreement with the triathlon committee, the CO 2 emitted when a participant
traveled from home to the convention site was offset (64.9% of the participants
agreed to pay to offset). The organizer agreed to pay to offset the CO 2 (about
1.6 tonnes) emitted by the use of electricity at the venue. Trading of carbon credit
were made directly between the credit creator (Yokohama City Fishery Cooperative
Association and Yokohama Hakkeijima Inc.) and the credit user (Yokohama Seaside
Triathlon), and Yokohama City conducted certification and issuance of certificates
for the credit (Fig. 12.2). Carbon offset in this social experiment was implemented
by buying and selling only Yokohama Blue Carbon Credit, and the unit price of
trading was set at 10,000 yen/tonne CO 2 (excluding tax).
12.4.4 Issues and Future Tasks for the Social Experiment
To assess the outcomes of and problems with the social experiment, Yokohama City
conducted a questionnaire survey of visitors to exhibition booths and triathlon participants on the day of the event. Of the visitors surveyed, 30.1% recognized
Yokohama Blue Carbon (Fig. 12.7). Of the race participants, 40.5% said they agreed
to pay to offset because “I want to contribute to the prevention of global warming”
and 32.4% responded “I want to improve the environment of the city” (Fig. 12.8).
Although the awareness of blue carbon was still low, the visitors and participants
showed interest in environmental issues.
To improve recognition of the Yokohama Blue Carbon Project, Yokohama City
ran a seaweed tasting booth on the day of the event. Also, the Carbon Offset
Certificate award ceremony was held at the Third International Blue Carbon
Symposium in Yokohama in January 2015. Here, the mayor of Yokohama gave a
Carbon Offset Certificate to the Yokohama Seaside Triathlon Convention Executive
Committee, which purchased carbon offset credits, and a letter of appreciation was
given to the credit creators, Yokohama City Fishery Cooperative and Yokohama
Hakkeijima Inc.
M. Nobutoki et al.