Local energy production for local consumption

Community Energy Management System (CEMS)
at CHIBA Mutsuzawa Energy Co., Ltd.

Optimal management of community-based energy has
made environmental, social, and economic impacts:
realization of low carbon community, advanced
disaster resilience, and reduced energy cost.
Overview of smart town
➢Complex facility consisting of a roadside station and a housing area
➢Electricity and heat, which are generated by photovoltaic power, solar heat, and gas
cogeneration system that uses natural gas produced in surrounding areas, are supplied via
private distribution line for self-consumption in the smart town (Local production for local
consumption)➢Excess heat from generator is supplied to hot bath facility next to the roadside station➢In a wide-area disaster, this area serves as a local disaster prevention center➢Electric cables of private distribution line are put underground to maintain landscape andCommunity Energy Management System (CEMS)

disaster prevention function➢CEMS measures and monitors electrical and thermal energy, carries out optimal
management of energy use and achieves visualization of energy supply and demand.
Optimal management of energy use includes optimum operation control of gas cogeneration
for combined heat and power, and control of energy demand to minimize received powerfrom the power grid by peak cut and peak shift.

Calculation ofelectricity charge

Community Energy
Management System

Locally
produced gas（CEMS）

Internet

RemoteofficeRemotemonitoringGas
governor

Solar water heater
DigitalsignageHeat source
deviceRoadsidestation

Gas cogeneration system

Boiler

Hot water
storage tankHeatexchanger

Private distribution line
(electric power)
Grid power

Substationequipment

PV power
generation facility

Private distribution line(electric power)

Hot bathfacility

Housingarea
Smart meterFunctions of Community Energy Management System (CEMS)
Calculation ofelectricity charge

Power grid

Remoteoffice

Remotemonitoring⑤Prevention of⑥Linkage of meter data
⑧Remote monitoringreverse overflow②Scheduled
operation

Community Energy
Management System（CEMS）③TemperatureGas
cogeneration monitoring⑦Visualization

Digital signage①Monitor andcontrol⑥Meter datacontrol

collection

Cushion tank

Smart meter

No④Demand

Sauna

Air conditioner

Functions①

Monitoring, measuring, and control of electric energy (electric power receiving,cogeneration, photovoltaic power, etc.) and heat energy (cogeneration, solar
heat, boiler, etc.) equipment②

Scheduled operation of cogeneration③

Controls start and stop of cogeneration equipment by monitoring temperatureof the lower layer of cushion tank④

Minimization of received power amount through peak cut and peak shift(CEMS automatically controls air conditioning load and demand for electricallyheated sauna at the roadside station)⑤

Controls start and stop of cogeneration equipment to prevent reverse power
flow to power grid⑥

Collection of 30-minutes meter readings from smart meters and linkage ofdata to electricity fare system⑦

Providing content for digital signage (Visualization of energy usage)⑧

Remote monitoring of the entire system
URL：https://www.csd.comway.co.jp/index_eng.html(Head Office

CSD Co., Ltd.

) West 6F, Kanagawa Science Park 3-2-1, Sakado, Takatsu-Ku,
Kawasaki-City, Kanagawa, Japan, 213-0012
TEL:81-44-819-2511 FAX:81-44-819-2510(Eastern Japan Office ) Hanshichi building, Omika-cho 4-3-13, Hitachi-City, Ibaraki,
Japan, 319-1221
TEL: 81-294-53-4331(Northeast Japan Office ) Yamaguchi building, Ichiban-cho 1-1-31, Aoba-Ku, Sendai-City,
Miyagi, Japan, 980-0811
TEL: 81-22-262-0330（Fukushima Sales Office ) Aoba-cho 8, Yanagawa-machi, Date-City,
Fukushima, Japan, 960-0756
TEL：81-24-577-0330