NOVELTY - The system has a passively movable material emitting heat while in a first portion of a conduit. A thermoelectric assembly (10) comprises a set of shunts (20) e.g. cold shunt, extending around a second portion. Two sets of thermoelectric elements (30, 40) are placed in thermal communication and in electrical communication with the shunts. The shunts are sandwiched between the thermoelectric elements, where the thermoelectric elements are electrically isolated from the second portion of the conduit. A heat exchanger (50) is placed in thermal communication with the shunts.    USE - U-shaped cartridge-based thermoelectric cooling, heating and power/electricity generation system i.e. solid state heat pump, for use in a combustion system i.e. vehicle/automotive exhaust system.    ADVANTAGE - The heat exchanger can be made of aluminum, copper and stainless steel alloy, so that the heat exchanger can withstand corrosion. The heat exchanger is provided with a shape memory alloy to move and become thermally insulated or decoupled from the shunt so as to protect the thermoelectric elements from excessive temperature. The electrical conduit can be electrically coupled to the cold shunt so as reduce or prevent heat from transferring along an electrical power line. The conduit has smaller diameter so as to improve thermal contact between the heat exchanger and the shunt and to allow better management of radial thermal expansion as less mismatch is created. The system requires low maintenance and high reliability. The thermoelectric elements can be arranged in various cartridge configurations to achieve appropriate properties, so that relatively uniform force/pressure can be maintained on the thermoelectric elements throughout cycling overall operating temperatures, shear and tensile stresses that can be minimized or eliminated and parasitic losses from electrical and thermal connections at hot and cold ends of the thermoelectric elements can made be sufficiently low. The thermoelectric assembly can be cost effective. The thermoelectric elements are capable of being sealed against atmospheric constituents and internal fluids, which are harmful to the system.    DETAILED DESCRIPTION - The conduit is an electrical conduit or tubular/elongated shaped fluid conduit. An INDEPENDENT CLAIM is also included for a method for generating electricity.    DESCRIPTION OF DRAWING(S) - The drawing shows an exploded perspective view of a thermoelectric assembly in thermal communication with a tubular fluid conduit with fluid flowing through the conduit along a direction.    Thermoelectric assembly (10)    Shunts (20)    Inner section of shunt (23)    Thermoelectric elements (30, 40)    Heat exchanger (50)