TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The power generation device is a fuel cell (12), the fuel gas is used to generate electricity. The power generation device comprises a compressor, a combustion chamber, a gas turbine and a first generator; the fuel gas and air passes into the combustion chamber for combustion via compressor, then passing into the gas turbine and then into the first generator for generating power. The power generation device further comprises a second generator, a steam turbine, a heat exchanger, a condenser, and a water pump, where the gas turbine is introduces exhaust gas into the heat exchanger, the water pump supplying condensed water to heat, then passing water vapor into the steam turbine, and to the second generator, then passing exhaust gas condensed with water into the steam turbine via condenser and then passing into the water pump to complete the cycle. The chemical potential difference is driven by a potential difference, the oxygen permeation chamber potential is higher than the potential of the reaction chamber; or the chemical potential difference is driven by the oxygen difference, then passing oxygen partial pressure into the oxygen permeation chamber when the decomposition reaction to reaches to thermal equilibrium. The chemical potential difference is driven by the oxygen difference, the oxygen permeable chamber is at least one to obtain desired oxygen partial pressure: the oxygen permeation chamber one end is closed, and the other end is connected to a vacuum pump; the oxygen permeation chamber is set with a reducing gas; and the oxygen permeable chamber is combined with oxygen where the oxygen adsorbs or removes substance. The oxygen permeable chamber produces oxygen partial pressure via methane. The oxygen permeable membrane sleeve material is La1-xSrxCo1-yFeyO3-( delta ) or BaxSr1-xCoyFe1-yO3-( delta ). The inner chamber is reaction chamber, and the outer chamber is the oxygen permeable chamber; or the inner chamber is oxygen permeable chamber, and the outer chamber is the reaction chamber. The double-layer reaction sleeve is in linear, serpentine or spiral shape; the outside sleeve tube and the oxygen permeable membrane sleeve are having circular cross-section, square, triangular, or trapezoidal shape. The solar energy utilization system comprises the collecting device is provided above the reaction chamber having operating temperature of 300 degrees C which also set with solar concentrator device, dish solar concentrator device, or tower solar concentrating device. The reaction gas is water vapor, the decomposition reaction produces hydrogen and oxygen gases; the reaction gas is carbon dioxide, the decomposition reaction produces carbon monoxide and oxygen; or the reaction gas is water vapor and carbon dioxide, the decomposition reaction produces hydrogen, carbon monoxide and hydrocarbons mixed gas and oxygen.x = 0-1;delta = 0 greater than or equal to less than 3; andy = 0-1.