A cogeneration system includes, at least, a biomass-burner assembly, a water-heater assembly, a heating-assembly, a compression-tank assembly, and an electricity-generator assembly. Additionally, in some embodiments, the cogeneration further includes a cooling-assembly and a thermoelectric-generator assembly. The cogeneration system burns/combusts a biomass material, preferably wood, to generate wood gas. The wood gas is used to provide heating, cooling and electricity to an area, such as a building or off-the-grid areas such as campgrounds.

A heating appliance of the electric radiator type, including a housing containing a DC operated electrical energy storage device charged by an electrical power supply source outside the appliance, and at least one heating body that can be powered by the electrical power supply source and/or by the electrical energy storage device. The housing also comprises at least one air inlet arranged in a lower part of the housing to allow air to enter the space internally defined by the housing, and at least one air outlet arranged in an upper part of the housing to allow the air to leave the space. The electrical energy storage device is arranged across the air flow that circulates, in the space, from the at least one air inlet to the at least one air outlet, in a location situated, as observed in the direction of circulation of the flow, between the at least one air inlet and the at least one heating body.

The disclosed technology includes an on-demand water heater which uses an electric heat source to heat the water. The on-demand water heater can have a low fluid capacity heating chamber which has an inlet and an outlet, an electric heat source for heating the water, and a controller to control the electric heat source and maintain the temperature of the water at a predetermined temperature setting. The on-demand water heater can be powered by a direct current power source. The on-demand water heater can also utilize a solar thermal system to provide additional heat to the water.

The invention relates to a portable heating system that in a first instance provides heat and in a second instance provides a source of electrical current from thermo electric modules where the produced electrical energy is intended to be forwarded to a rechargeable battery. The rechargeable battery serves as a current source for the portable heating system e.g. for driving the fuel pump and air fans. When the rechargeable battery is replenished with electrical energy a control is configured to switch the by the thermo electrical modules generated electrical energy to selected power consumers arranged with the portable heating system in order to facilitate the thermo electrical modules to keep the intended quality serving as a heat pump for transferring the produced heat from a burner to a transportation media for releasing the heat in the designated intended area.

An energy generating system for generating thermal energy and electrical energy for a premises. The system includes an engine that drives an AC power generator to supply supplemental or standby power to the premises. The thermal energy given off by the engine is also coupled to the premises to provide heat thereto. A processor controls the various parameters of both the energy generating system and the premises to coordinate the proper heating and cooling thereof.

A water heater control system the water heater system comprising a rechargeable and non-rechargeable power source. In one or more examples, a controller such as a microcontroller of the water heater system is configured to receive power from the non-rechargeable power source and does not receive power from the rechargeable power source. Various other components of the water heater system are configured to receive power from the rechargeable power source. The system may comprise an energy storage system electrically connected to a pilot valve operator and electrically isolated from a main valve operator. The controller may be configured to recognize a call for main burner operation and may also be configured to check an available voltage of the energy storage system against a setpoint.

A combined heat and power system generates energy and efficiently captures a percentage of such energy that would otherwise be lost to, among other things, control the temperature and humidity of a house or dwelling.

A multi-functional retrofit cover plate assembly and method for an electric water heater to provide interconnection with an alternative energy system to heat water in a water holding tank of the electric water heater. The cover plate is adapted for replacement connection over a bottom access opening formed in an outer casing of the electric water heater which permits access to a bottom resistive heating element and electrical connections. The retrofit cover plate is shaped to define an internal dedicated compartment. A dual resistive heating element is provided for replacement of the bottom resistive heating element. An electronic switch unit is further provided and it has a power cut-off switch for connection to an alternative supply voltage. A temperature sensor is provided for mounting against an outer surface of the tank of the water heater to feed actual temperature signals of water temperature within the tank, in a lower region thereof, to the electronic switch unit which operates the power cut-off switch upon a predetermined temperature having been attained in the tank of the water heater. The retrofit cover plate and the assembly also make it possible to covert the water heater to a high temperature water heater or to adapt the electric water heater to a thermal fluid heat source.

An electrical radiator type heating appliance comprises a case housing a heater member producing a first flow of calories (F1) when an input of the heater member is powered by a direct electric voltage. The heating appliance also comprises a voltage converter implanted in the case and comprising an input provided with connection elements for connecting the voltage converter to an electric power supply source and an output delivering a direct electric voltage adapted to directly or indirectly power the input of the heater member.

A combined heat and power system generates energy and efficiently captures a percentage of such energy that would otherwise be lost to, among other things, control the temperature and humidity of a house or dwelling.