The present disclosure belongs to technical field of thermoelectricity, particularly relates to a cogeneration apparatus, including a thermal collector and a thermoelectric power generation component, the thermoelectric power generation component is disposed on the thermal collector and an end face at one side contacts with the thermal collector, the cogeneration apparatus can collect the heat generated after gas combustion through the thermal collector, the heat is used for heating one end of the thermoelectric power generation component, so that two ends of the thermoelectric power generation component form a temperature difference, thereby realizing power generation. In this solution, a compensating distance is disposed between an upper end of the thermoelectric power generation component and an upper end of the thermal collector. The whole power generation efficiency of the apparatus is improved through a relationship between the output power of the thermoelectric power generation component and the compensating distance.

A gas water heater that includes a sheathed thermistor placed into the combustion chamber near a gas burner to provide for more accurate measurements of the temperature therein. The thermistor may be used in combination with a thermopile to provide additional measurements for determination of temperature conditions requiring a closure of a valve controlling the flow of gas to the burner

A system for monitoring temperature in the combustion chamber of a gas fueled water heater using a thermoelectric device placed near the gas burner. Based on the measured temperature, the water heater can determine whether abnormal operation is occurring that would require closing the flow of gaseous fuel to e.g., the main burner, pilot burner, or both.

A thermoelectric battery system includes a heat pump configured to generate heat. A buffer tank is thermally coupled to the heat pump and configured to store the generated heat in boiler water. A thermal battery is thermally coupled to the buffer tank. The thermal battery provides at least one of hot water for domestic use, hydro-heating, or hydro-cooling. The first thermal battery includes: an inner tank configured to contain a portion of boiler water and an outer tank containing a phase change material. The outer tank surrounds the inner tank and is separated therefrom by a thermally conductive wall. The outer tank is configured to supply heat to the inner tank. A heat exchanger disposed in the inner tank is configured to heat potable water flowing therethrough to enable potable water to be heated by boiler water to produce domestic hot water.

An apparatus for recovering heat in an ablutionary or plumbing system includes first and second pipes for carrying fluids at different temperatures. A first heat transfer element is configured to be thermally coupled to the first pipe and a second heat transfer element configured to be thermally coupled to the second pipe, with each having an elongate portion extending in a direction away from the associated pipe. The elongate portions of the first and second heat transfer elements at least partially overlap. A thermoelectric device is provided that includes one or more thermoelectric elements located between the elongate portions, the thermoelectric element(s) being in thermal communication with the elongate portion of the first heat transfer element and the elongate portion of the second heat transfer element and being arranged to generate electricity from a temperature differential between the elongate portions of the first and second heat transfer elements.

A flame powered intermittent pilot combustion controller may include a first power source and a second power source separate from the first power source, a thermal electric and/or photoelectric device, an igniter and a controller. The thermal electric and/or photoelectric device may charge the first power source when exposed to a flame. The controller and the igniter may receive power from the first power source when the first power source has sufficient available power, and may receive power from the second power source when the first power source does not have sufficient available power.

An embodiment of the present invention relates to a cold and hot water supply and power generation system including a graphene-coated ceramic heating element, which can control temperatures of cold and hot water based on the graphene-coated ceramic heating element and a heat pump, use power generated by thermoelectric power generation based on a temperature difference between the cold and hot water, and supply the cold and hot water to a demand source or use the same for cooling and heating.

An embodiment of the present invention relates to a cold and hot water supply and power generation system including a graphene-coated ceramic heating element, which can control temperatures of cold and hot water based on the graphene-coated ceramic heating element and a heat pump, use power generated by thermoelectric power generation based on a temperature difference between the cold and hot water, and supply the cold and hot water to a demand source or use the same for cooling and heating.

A plumbing fixture includes a water passage configured to hold water, a first plate shaped according to a cross section of the water passage and spaced at a first distance from the water passage, and a second plate shaped according to the cross section of the water passage and spaced at a second distance from the water passage. A voltage between the first plate and the second plate is generated based on the water in the water passage.