[Client type / Hospitals]
Keiyu Hospital

Customer’s remark

We actually practiced efforts for energy conservation by moderate temperature settings, nonuse of air conditioners or lightings when unnecessary, etc. But this time, we have got our energy conservation program into full gear by introducing new facilities. The program is seeking for improvement in environment and energy conservation with cooperation of the service provider.

Sales points

Even inconspicuous wastages of energy were pointed out and measures were taken for that. In addition, as the building has broad glass windows, measures reducing sun penetration was taken. As a result, both energy conservation and improvement in environment could be realized at the same time.

Energy conservation effect

Comparison between before and after the facility installation

Before facility installation (the reference values)
	Electricity [kWh]	Cold water [MJ]	Hot water [MJ]
Total by item	7,337,967	25,953,000	33,426,000
Primary energy consumption (GJ/year)	75,471	25,953	33,426
Total	134,850
Energy consumption basic unit (MJ/m²•year)	3,850

After facility installation (the measured or estimated values)
	Electricity [kWh]	Cold water [MJ]	Hot water [MJ]
Total by item	7,182,109	22,313,000	33,663,000
Primary energy consumption (GJ/year)	73,868	22,313	33,663
Total	129,844
Energy consumption basic unit (MJ/m²•year)	3,710

Key points in installation work

As the installation work was carried out without closing the hospital, utmost attention had to be paid to the safety of both in-patients and out-patients, and thus a meticulous schedule was worked out, according to which the hospital and the contractor carefully conducted the installation work in closer cooperation.
Part of the work had to be carried out inside the hospital, but understanding of the patients could be obtained by explaining that the purpose of the work was improvement in environment and energy conservation, and the work could be smoothly carried on.

Before installation work

After installation of insulating films

Facility specifications

Contract demand	1,350kW	Air-conditioning facilities	district heating and cooling (DHC) and air conditioner, FCU
Stories	13 stories above ground and 3 below	Refrigerating capacity	DHC (cold water)
Total floor area	35,000m²	Heating capacity	DHC (steam)
Receiving voltage	20kV	Type of air-conditioning	air conditioner, FCU

Energy conservation measures

Automatic control of air-conditioner settings	Settings of air conditioners are automatically adjusted according to load factors.
Optimal control of heat source pressures	Pressures of heat sources are adjusted according to load factors.
Installation of insulating window films	By cutting the penetrating sun, thermal efficiency of air conditioning is improved.
Fan control according to CO concentration in car parking	According to detected CO concentration, power supply for ventilating fans of the basement car parking is controlled, to reduce waste of electricity.

Fund raising and subsidies

Fund	:	self-financing
Subsidies	:	Project for Promoting the Introduction of High-Efficiency Housing/Building Energy Systems (Project for promoting BEMS introduction)

Contract type and contract period

Guaranteed-savings contract / 2 years