再生エネルギー研究センターパンフレット（英語）

16/20

15Main Demonstration FacilityThin-Crystalline Silicon Solar Cells R&D Foundry　An integrated manufacturing line of thin crystalline-silicon solar cells was provided in a separate laboratory of FREA to develop a mass-production technology for solar-cell modules with high efficiency, low cost, and high reliability. In this line, cells with conversion efficiency equal to or greater than that of mass-produced goods of the manufacturer can be produced.Ground-Source Heat Pump System Demonstration Area　At the demonstration test site for the geothermal heat utilization system at FREA, GSHP systems is installed using a sheet-type and a Slinky-type heat exchanger installed at a depth of 1-2 m underground and a vertical-type (borehole type) heat exchanger installed at a depth of about 40 m. The team compares these systems and develops a technology for optimizing operating methods combining both of them.　A real-time monitor is also installed to display the underground temperature, the COP (performance indicator) of the system, the room temperature, and other parameters in real time. The team aims to diffuse and promote the geothermal heat utilization system through the “visualization” of real-time operating conditions and the portion of heat exchange wells.Thin-Crystalline Silicon Solar Cells R&D Foundry Layout Chart①Silicon Ingot Slicing(Wafering)Multi-Wire Saw②Surface TextureFormationSurface Texture Formation Machines③PN Junction FormationThermal Diffusion ApparatusIon Implantation Machine④Antireflection 　　Film DepositionPE-CVD Machine⑤Electrode Printingand FiringElectrode Printing and Firing Machine⑥Photovoitaic Module Fabricationand Reliability TestVacuum LaminatorReliability Test MachinesOverview of Ground-Source Heat Pump System Demonstration AreaState of installation of an underground heat exchangerGround-Source Heat Pump System (inside)Inlet of a pipe into a roomTop of a heat exchange well (40 m deep)Heat Pump (inside)Heat Exchanger (borehole type)Heat Exchanger (sheet type)Heat Exchanger (slinky type)FREA Ground-Source Heat Pump System