Abstract:
PROBLEM TO BE SOLVED: To make effective use of electric power of a storage battery even when it is necessary to prevent an inverse load flow from the storage battery to a commercial power supply during an interconnection operation.SOLUTION: The dispersed power supply system includes: first adjustment means (a DC-DC converter 11) for adjusting a DC voltage output from a generated power supply (a solar battery 10); second adjusting means (a bidirectional DC-DC converter 12) for adjusting a DC voltage output from the storage battery 14; conversion means (a bidirectional DC-AC converter 13) for inputting DC power output from the first and the second adjusting means, converting the voltage into AC power and supplying the power to a load 30 and, as needed, inversely flowing the power into a commercial power supply 40; and control means (control sections 15-1 to 15-3) for controlling the second adjusting means and conversion means so that electric power is not flowed into the commercial power supply from the storage battery while AC power is being flowed into the commercial power supply from the conversion means.
Abstract:
PROBLEM TO BE SOLVED: To measure the level of liquid such as water staying in piping within a comparative short time by using a radiation source of an authentication apparatus with a display of a very small dose having no usage restrictions.SOLUTION: In a method for measuring the level of liquid staying in the radiation transmission type piping, a radiation source 4 and a radiation detector 5 are arranged opposed to each other in the horizontal direction across the piping 1 to be measured horizontally laid, the radiation source 4 and the radiation detector 5 are scanned in the vertical direction with respect to the piping 1 to be measured, and the level of the liquid staying in the piping 1 to be measured is measured on the basis of the radiation transmittance obtained from the radiation detector 5 by radiation emitted from the radiation source 4.
Abstract:
PROBLEM TO BE SOLVED: To provide an exhaust heat-using system recovering heat of waste water and effectively using the heat throughout the year. SOLUTION: The exhaust heat-using system includes: a pump device 12 for pumping up waste water within a waste water treatment tank 11; an exhaust heat recovery heat exchanger 13 having a heat exchanger primary side 13a through which the waste water passes and a heat exchanger secondary side 13b for exchanging heat; an air conditioner 15 having a preheating heat exchanger 16 for preheating outside air and controlling the temperature and humidity of the outside air to supply the outside air to an indoor air conditioning zone 14; a cooling tower 17; a refrigerating machine 19 for cooling the air conditioner 15 or inside of a production facility side 18; a refrigerant circuit 21 for making refrigerant fluid made to pass through the heat exchanger secondary side 13b flow in the preheating heat exchanger 16, the cooling tower 17 and the refrigerating machine 19; and a preheating cooling route selector valve 35 arranged in the refrigerant circuit 21 and capable of switching a circulation route of the refrigerant fluid between a preheating route form for circulation in the heat exchanger secondary side 13b and the preheating heat exchanger 16 and a cooling route form for circulation in the heat exchanger secondary side 13b, the cooling tower 17 and the refrigerating machine 19. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an optical switch that can be installed without explosion prevention construction, and can indicate that switch operation is recognized in an explosion-prevention object area.SOLUTION: At an operation part 2, end parts 9a, 9b of an optical fiber 9 are connected to a detection control part 11 installed outside an explosion-prevention object area 3. A looped part of the optical fiber 9 is installed in the explosion-prevention object area 3. At the operation part 2, laser light etc., entering the optical fiber 9 from one end part 9a by the detection control part 11 is propagated to the other end part 9b, but transmission loss is generated by operating a push button 5 installed in the explosion-prevention object area 3 and physically bending the optical fiber 9. The detection control part 11 monitors the transmission loss and outputs a detection signal on detecting the transmission loss. At a display part 4, light is transmitted to the optical fiber 13 from a visible light source 15 installed outside the explosion-prevention object area 3 on the basis of the detection signal to turn on and off a pilot lamp 4 installed in the explosion-prevention object area 3.