Patent ID: 7674543

Claim:
A solid oxide fuel cell, comprising: a plurality of tubular electrodes, being concentrically arranged to form a plurality of reaction chambers therebetween while enabling the polarity of a surface of any one of the plural electrodes to be the same as that of the corresponding surface of a neighbor electrode faced thereto, each tubular electrode being comprised of an anode layer, a cathode layer, and a solid electrolyte layer sandwiched between the anode layer and the cathode layer; a reacting gases supplying means, capable of supplying a fuel and a gas respectively to the anode and cathode of each tubular electrode, wherein the reacting gases supplying means further comprises: a gas pipe, being arranged in the space enclosed by the inner most tubular electrode of the plural concentric-arranged tubular electrodes and passing through the inner most tubular electrode, having at least a hole arranged on the pipe wall thereof at a position corresponding to each reaction chamber formed between two cathode layers respectively of two adjacent tubular electrodes for enabling the gas flowing therein to flow into the referring reaction chamber by way of each corresponding hole, wherein said gas pipe is consisted of a single gas pipe; and a fuel pipe, being arranged in the space enclosed by the inner most tubular electrode of the plural concentric-arranged tubular electrodes and passing through the inner most tubular electrode, having at least a hole arranged on the pipe wall thereof at a position corresponding to each reaction chamber formed between two anode layers respectively of two adjacent tubular electrodes for enabling the fuel flowing therein to flow into the referring reaction chamber by way of each corresponding hole, wherein said fuel pipe is consisted of a single fuel pipe; and a preheat piping, connected to the reacting gases supplying means, for collecting the heat generated from the combustion reaction of residual fuel and gas to preheat the fuel and gas inside the reacting gases supplying means.