Abstract: An apparatus is provided for generation of combined heat and power comprising an engine configured in a free-piston arrangement comprising two opposed pistons arranged in an elongated cylinder having at least one inlet port and at least one outlet port with uniflow scavenging, an electricity generator, means for harnessing heat and means for transmitting load from the engine to the electricity generator. The engine is configured to operate at close to constant volume combustion, high compression ratio, a lean fuel to air ratio and uses homogeneous charge compression ignition. The engine further comprises a synchronizing mechanical or hydraulic linkage between said two opposed pistons. A method for generating combined heat and power and a method for configuring apparatus for generating combined heat and power are also provided.

Abstract: An improved electrode and method of use are disclosed in connection with hyperthermal treatment of tumors in humans and animals wherein a radio frequency current is caused to flow between a pair of the electrodes and through a body portion containing the tumor. The electrode assembly includes a fluid conduit in thermally conductive relation with an electrically conductive electrode in the assembly as well as jets arranged about the periphery of the conductive electrode for cooling surrounding surface portions of the body during the hyperthermal treatment. The conductive electrode is connected with a circuit for producing the radio frequency current.