Start of Verification Test on "External Power Supply Type Idling-Stop Air-Conditioning System"

--- CO2 emissions cut by 77% and fuel cost also cut to approximately one-fifth by stopping engine idling ---

July 27,2005 Tokyo Electric Power Co.,Inc. Hino Motors, Ltd.

　Tokyo Electric Power Co., Inc. (Head Office in Chiyoda-ku, Tokyo; President: Mr. Tsunehisa Katsumata) and Hino Motors, Ltd. (Head Office in Hino-shi, Tokyo; President: Mr. Shoji Kondo) have jointly been undertaking the development of the "External Power Supply Type Idling-Stop Air-Conditioning System" which is designed to supply external power directly to a specially installed air-conditioning unit for trucks in which the drivers often have to be on standby for hours while the engine is running at idle. The system is aimed at reducing the environmental impact of engines left idlins.
　Recently, it was decided to conduct a verification test on the above system over the period August 1,2005_March 31,2006 at Toshin Truck Station (Yamato-shi, Kanagawa) [Note 1].

　Reducing the emissions of gases that contribute to global warming, including CO2, and hazardous gases, is a widely sought goal. The CO2 emissions in fiscal year 2003 as compared to fiscal year 1990 showed an increase of 20.1% for the transport sector in particular. There is an obvious pressing need for concrete means to cut gas emissions.
　Stopping the idling of engines is now drawing attention as one effective means to reduce gas emissions. However, there are those inevitable cases where trucks have to be parked or stopped with their air-conditioning turned on in the cab, and therefore, with the engine left idling, such as when the driver takes a nap or waits for his turn to load or unload. Therefore, the transportation sector is now under pressure to devise ways to efficiently restrain prolonged engine idling.
　Under these circumstances, Tokyo Electric Power Co., Inc, with the advantage of possessing an environmentally superior network power, and Hino Motors, Ltd., aiming at reducing the environmental burdens associated with physical distribution, have teamed up to develop the system reported herein.

　This system is composed of the "External Power Supply Type Air-Conditioning Unit" [Note 2], which is installed above the driver's seat (on the roof), and the "Feeding Station" (External Power Supply Unit), which is installed at a parking lot and supplies power to the air-conditioning unit directly from outside the vehicle. The system makes it possible to air condition a truck cab for hours with the engine stopped while the vehicle is parked.
　With the support of the Ministry of Land, Infrastructure and Transport of the Japanese government, as well as the cooperation extended from the Truck Transport Business Promotion Center and three transport companies, the planned verification test will be conducted using three "Feeding Stations" installed at the parking lot at Toshin Truck Station, and "External Power Supply Type Air-Conditioning Units" mounted on six trucks owned by the three transport companies. The system will be studied in day-to-day transport operations, problems in its actual use, including the usability, will be extracted, and the performance of the charging system, quality of engineering and other aspects will be examined.

　When engine idling is stopped by using this system, reductions of CO2 by approximately 77% and NOx by approximately 97% per hour on a large-sized truck (when cooling is used)[Note 3] can be expected as an effect in the reduction of the environmental impact. Moreover, no exhaust gas is discharged from the vehicle at the parking lot, with a resultant decline in the ambient noise level as well.

　Furthermore, this system can be operated at a power consumption cost as low as approximately one-fifth [Note 4] (when cooling is used) of the fuel consumption cost of a truck left with its engine idling. This promises substantial cost savings for transport companies.

　Tokyo Electric and Hino Motors will efficiently carry out the verification test outlined above and continue with our efforts to put the system into practical use, including pursuing ways to reduce the cost of the system in itself. At the same time, future study will be directed toward the possible application of the same technology to vehicles equipped with freezers and refrigerators. Efforts will be made to expand the application of this technology beyond air-conditioning units in a bid to contribute further to the reduction of the environmental impact of trucks.

[Note 1] Toshin Truck Station

　Parking area: Capable of accommodating 21 trailers, 74 large-sized vehicles, and 22 ordinary vehicles.
　Location: 588 Kami-Kusayanagi, Yamato-shi, Kanagawa
　Operation and management: Truck Transport Business Promotion Center
　* Truck Station is a facility that truck drivers can use to rest, take a nap, stay overnight, bathe, dine, conduct business
communications, and for other similar purposes. There are 40 facilities of this kind throughout Japan.

[Note 2] External Power Supply Type Air-Conditioning Unit
　The cooling unit consists of a package cooler mounted above the driver's seat (on the roof), which is independent of the air-conditioning unit of the vehicle. The supply voltage is 200 VAC, single-phase. This versatile system can be retrofitted to large-sized, medium-sized, and small-sized trucks. Its heating unit uses a thermal storage mat and electric blanket.

[Note 3] The calculated values for comparison of environmental aptitude when the system is used for cooling are given below:
(Values per hour of idling for a 10-ton truck)

	When idling	When network power is used	Reduction obtained	Reduction ratio
CO2 emissions	4.09kg	0.95kg	3.14kg	76.8%
NOx emissions	28.55g	0.75g	27.80g	97.4%

(Calculation bases, sources, etc.)

*Fuel consumption of large-sized truck = 1.56 l/hr. (Calculated on the basis of the fuel consumption for 10 min. converted into a value of 1 hour, using "gas oil" as the fuel. The value of fuel consumption was obtained from the web site of the Ministry of Environment.) *The power consumption for cooling was calculated taking the rated value of 2.5 kW used in the design of the "Package Cooler". *CO2 emission factor of network power = 0.378 kg-CO2/kWh, and CO2 emission factor of gas oil = 2.62 kg-CO2/l. (Values from "Enforcement Ordinance of the Law on the Promotion of Global-Warming Countermeasures.) *NOx emission factor of network power = 0.0003 kg-NOx/kWh. 　(From "Environment and Energy: Japan's Electric Power Industry in the World 2004-2005", The Federation of Electric Power Companies of Japan) *NOx emission factor of gas oil = 0.0183 kg-NOx/l (From "Environmental Activity Assessment Program (Sept., 1999)", Environment Agency)

[Note 4] The calculation results for comparison between the fuel consumption cost and the power consumption cost (when cooling is used) are given below.
(Cost comparison per hour of idling for a 10-ton truck)

		When idling	When this system is used Power for institutional use
(1)	Fuel consumption (l/hr.)	1.56	-
(2)	Power consumption (kWh)	-	2.5
(3)	Unit price of fuel (yen/l)	87.9	-
(4)	Unit price of electric power (yen/kWh)	-	11.08
(5)	Cost (yen/hr.)	137.12	27.70

(Calculation bases, sources, etc.)
	(1) Fuel consumption: Fuel consumption of large-sized truck = 1.56 l/hr. (Calculated on the basis of the fuel consumption for 10 min. converted into a value of 1 hour, using "gas oil" as the fuel. The value of fuel consumption was taken from the Web site of the Ministry of Environment.) 　(2) Power consumption: Calculated on the basis of the rated value of 2.5 kW used in the design of the "Package Cooler" 　(3) Unit price of fuel: Surveyed by Tokyo Trucking Association (as of June 20, 2005) (4) Unit price of electric power: Base rate according to the summer rate of "the period from July 1 to Sept. 30" of the power for business use with the supply voltage of 6 kV and contract demand below 500 kW, under the "Electric Power Demand and Supply Agreement". The price does not include any amount corresponding to the consumption tax or other taxes.
		The price does not include any amount corresponding to the consumption tax or other taxes.

[Please direct your inquiries about this subject to: 　Corporate Communications Dept. 　Tokyo Electric Power Co., Inc. 　Tel.: 03-4216-1111 (main number) 　Corporate Planning Div. 　Hino Motors, Ltd. 　Tel.: 03-5419-9320

Brief Description of the Verification Test for the "External Power Supply Type Idling-Stop Air-Conditioning System"


1. Outline of verification test
(1) Description
- A dedicated parking area for large-sized vehicles (large enough for three vehicles) is secured at Toshin Truck Station, and three "Feeding Stations" (External Power Supply Units) are installed there.
- "External Power Supply Type Air-Conditioning Units" are installed on six trucks owned by three transport companies. These units are fed with external AC power directly from the "Feeding Stations" and the idling (engine) is stopped when drivers rest while their vehicle is parked at Toshin Truck Station, which they routinely use.
- This system is put to practical use in daily transport operations for testing and identifying problems in practical use related to the usability of air-conditioning. At the same time, the performance of the charging system (management of such data as the consumed electric energy, amount of time the vehicle connected to system, etc.) and the quality aspect of engineering are also verified.

(2) Period: Aug. 1, 2005 through Mar. 31, 2006

(3) Place: Toshin Truck Station (588 Kami-Kusayanagi, Yamato-shi, Kanagawa)

2. Outline of system
(1) Equipment
1) External Power Supply Type Air-Conditioning Unit
-The package cooler is mounted above the driver's seat (on the roof) of the truck and is operated to cool the cab.
- For heating, an electric blanket and thermal storage mat are provided inside the cab.
2) Feeding Station (External Power Supply Unit)
- The "Feeding Station" is installed to feed the External Power Supply Type Air-Conditioning Unit with network power. (340-mm wide x 312-mm deep x 1,500-mm high)


(2) Charging system in the verification test
- A non-contact IC card is used to authenticate the user. The system temporarily retains the information of an authenticated user.

- After the Feeding Station has been used, the system transmits (packet communication) consumed electric energy data and other information to a remotely located server, hence, calculation of the usage rate and charging processing are automatically performed.(No charging action is actually taken in the verification test.)
- The usage history of the Feeding Station can be checked not only by the owner of the Feeding Station, but also by the user himself through the Internet.
* This is a provisional system implemented at this point in time. Further study is planned to examine the future trends of technical development, and to eventually come up with an optimum system.

3.Organizational setup for verification test
(1)System development
	- External Power Supply Type Air-Conditioning Unit: Hino Motors, Ltd. - Feeding Station (External power supply unit): Tokyo Electric Power Co., Inc.
(2)Development period
	From July 2002
(3)Cooperation in the verification test
	- Truck Transport Business Promotion Center Address: Shinjuku L Tower 19th floor, 1-6-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Chairman of the Board: Mr. Noriyuki Komaru * Organization that operates and manages truck stations. - Ministry of Land, Infrastructure and Transport (Support)