The invention relates to a device for storing temperature-controlled fluids, comprising at least one container (20), a Peltier element (30), the hot side (301) of which is in contact with at least one wall (201) of the container (209), at least one device (40) for delivering ambient air to the cold side (302) of the Peltier element (30), and at least one electrical energy source (50, 501, 502) for supplying the Peltier element (30) and the device (40) for delivering the ambient air. For low-loss storage of the fluid in the container (20), the device (40) for delivering ambient air can be operated according to the temperature of the ambient air and the heating capacity of the Peltier element (30) can be controlled according to the currently produced electrical energy of a photovoltaic solar generator (501) forming an electrical energy source. Preferably, times and/or durations of the heat energy emitted from the Peltier element (30) and/or from an accumulator (502) to the fluid can be controlled by a control appliance (6) on the basis of at least one requirements specification stored in the control appliance (60).

A combined heat and power plant includes a gasifier, a heat exchanger arranged to reduce the temperature of the raw synthesis gas formed in the gasifier by exchanging the heat of the raw synthesis gas into heating medium used for heating and forming cooled raw synthesis gas, a filtration unit for cleaning the cooled raw synthesis gas to form refined synthesis gas suitable as a fuel for an internal combustion engine, an internal combustion engine where the refined synthesis gas is burnt to produce mechanical power, ducts for connecting different parts of the plant to each other a raw gas burner arranged after the gasifier to burn the raw synthesis gas formed in the gasifier during the time when the refined synthesis gas is not utilized in the internal combustion engine. A method for treating raw synthesis gas a combined heat and power plant is also disclosed.

In one aspect, the present disclosure is directed to preventing or lessening ice in remote water tanks. The remote water tanks can include a body at least partially defining a chamber that receives a liquid and having an open top portion that provides one or more animals access to the liquid. Further, a heat exchanger can be at least partially received within the chamber, and can receive a thermal transfer fluid that is circulated therethrough to maintain a temperature of the liquid in the chamber. Also, an external heat collector can be in fluid communication with the heat exchanger to transfer solar or other heat to the thermal transfer fluid as the thermal transfer fluid is circulated therethrough.

A combined heat and power plant includes a gasifier, a heat exchanger arranged to reduce the temperature of the raw synthesis gas formed in the gasifier by exchanging the heat of the raw synthesis gas into heating medium used for heating and forming cooled raw synthesis gas, a filtration unit for cleaning the cooled raw synthesis gas to form refined synthesis gas suitable as a fuel for an internal combustion engine, an internal combustion engine where the refined synthesis gas is burnt to produce mechanical power, ducts for connecting different parts of the plant to each other a raw gas burner arranged after the gasifier to burn the raw synthesis gas formed in the gasifier during the time when the refined synthesis gas is not utilized in the internal combustion engine. A method for treating raw synthesis gas a combined heat and power plant is also disclosed.

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.

In one aspect, the present disclosure is directed to preventing or lessening ice in remote water tanks. The remote water tanks can include a body at least partially defining a chamber that receives a liquid and having an open top portion that provides one or more animals access to the liquid. Further, a heat exchanger can be at least partially received within the chamber, and can receive a thermal transfer fluid that is circulated therethrough to maintain a temperature of the liquid in the chamber. Also, an external heat collector can be in fluid communication with the heat exchanger to transfer solar or other heat to the thermal transfer fluid as the thermal transfer fluid is circulated therethrough.

The invention relates to a system for producing hot water, comprising a hot water reservoir, a first and a second resistance heating rod for heating the water in the hot water reservoir, a reservoir temperature sensor, and a control unit, by means of which the first resistance heating rod can be connected to a network alternating voltage source, wherein the system comprises a photovoltaic device for producing a direct voltage and the photovoltaic device can be connected to the second resistance heating rod by means of the control unit or a further control unit.

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 heating and power generating apparatus comprises: a frame installed on the roof of a building and having a predetermined area; a plurality of power generating units arranged inside the frame to collect sunlight and generate electricity; and a hot water supply unit buried inside of the frame to absorb sunlight and perform heating and hot water supply. According to the present invention, hot water can be generated by sunlight in the winter to supply hot water and heat a house, and power can be generated by sunlight in the summer to supply power for cooling a room and thus conserve the electrical energy used in a cooler, thus promoting energy saving and environmental protection.

A power generation system of the present invention includes: a fuel cell unit (101) including a fuel cell (11) and a case (12); a controller (102); a combustion unit (103) provided outside the case (12) and configured to combust a combustible gas to supply heat; and a discharge passage (70) configured to cause the fuel cell unit (101) and the combustion unit (103) to communicate with each other, wherein in a case where an exhaust gas is being discharged to the discharge passage (70) from one of the fuel cell unit (101) and the combustion unit (103) and the controller (102) changes the flow rate of the exhaust gas discharged from the other unit, the controller (102) controls at least the flow rate of the exhaust gas discharged from the other unit such that the flow rate of the exhaust gas discharged from the one unit becomes constant.