A heat supply system with a first temperature detection unit that detects a first temperature of hot water in a tank, and a second temperature detection unit that detects a second temperature above the first temperature detection unit. When the first temperature is a first lower limit temperature or less, where a temperature increase operation by a combined heat and power supply device is permitted, a control device operates the combined heat and power supply device and flow state adjustment devices such that a heat medium circulates between the combined heat, power supply device, and hot water storage device. When the second temperature is a second lower limit temperature or less, where a temperature increase operation by a boiler device is permitted, the control device operates the boiler device and the flow state adjustment devices such that the heat medium circulates between the boiler device and hot water storage device.

A heat exchange system for transferring heat energy to control the temperature of a building comprising: a first heat exchanger having a first and second inlet and a first and second outlet wherein waste water flows through said first inlet of said first heat exchanger and out said first outlet while a water supply flows through said second inlet through said first heat exchanger and out said second outlet so as to transfer heat energy between said waste water and said water supply; and a second heat exchanger having a first and second inlet and a first and second outlet wherein domestic water flows through said first inlet, through said second heat exchanger and out said first outlet while said water supply from said second outlet of said first heat exchanger flows through said second inlet, through said second heat exchanger and out said second outlet so as to further transfer heat energy between said domestic water and said water supply from said second outlet of said second heat exchanger and control the temperature of said building.

A waste heat recovery device with a first heat medium side inlet; a first heat medium side outlet; a first heat medium flow path; a second heat medium side inlet; a second heat medium side outlet; a second heat medium flow path; a heat exchanger that exchanges heat between the first heat medium and second heat medium; an expansion tank in the first heat medium flow path; a bypass flow path that causes the first heat medium to flow and bypass the heat exchanger; and a mixer where the bypass flow path and first heat medium flow path merge together. The mixer is configured to adjust a ratio of a flow rate of the first heat medium in the bypass flow path and a flow rate of the first heat medium in the heat exchanger, such that the temperature of the first heat medium after merging approaches a predetermined temperature.

A combined heat and power system, or an energy system, is provided. A four-stroke opposed-piston engine provides efficient power from a generator set or genset. A heat exchange system is provided within the energy system to provide efficient waste heat recovery as the engine is operated.

Heat from a rotating prime mover(s) driving a fluid shear pump, heat from the prime mover and any exhaust heat generated by the prime mover is collected. The heat energy collected from all of these sources is transmitted through heat exchangers to a fluid where heat energy is desired. This fluid heating process is performed in the absence of an open flame.

A heating system is connected to a source of supply fluid to be heated, and has an internal combustion engine provided with engine coolant and gases that flow to and from the engine, and are heated thereby. A heat generator is provided in fluid communication with a supply of heat transfer fluid for circulating the heat transfer fluid in the heat generator causing fluid friction to create heat directly in the heat transfer fluid, and provide heated transfer fluid that is not in fluid communication with the engine. A fluid heat exchanger arrangement is provided in fluid communication with the supply fluid, the engine coolant, the gases of the engine and the heated transfer fluid for transferring heat from the heated engine coolant, the heated engine gases, and the heated transfer fluid to heat the supply fluid.

The invention relates to a method and apparatus for low temperature waste heat utilization. In the scope of the cogeneration unit (CHP) there are few low temperature sources, which cannot be used by heat consumer (HC) directly. Hence, the method and apparatus for cogeneration power plant waste heat recovery comprise at least one, preferably condensing type heat exchanger (HE2), which collects the waste heat for water source high temperature heat pump (HP) employment, wherein its hot water outlet is fed to the internal combustion engine (ICE) cooling system, i.e. cooling jacket type heat exchanger, wherein the maximum allowed coolant inlet temperature is achieved and maintained by automated control system (i.e. control unit with motorized control valves (V1-V3)). It is important to notice, that low temperature sources are herein represented by the exhaust gas in the scope of exhaust system, the charging air in the scope of the intercooler or turbo-supercharger, and lubrication oil cooling system in the scope of internal combustion engine (ICE) or heat pump (HP).

A combined heat and power plant for the decentralized supply of power and of heat may include at least one prime mover for providing electrical energy while providing waste gas, at least one thermal store for storing thermal energy provided by the waste gas, and at least one high-temperature battery in which the electrical energy provided by the prime mover can be stored. The high-temperature battery can be supplied by the waste gas provided by the prime mover to keep the high-temperature battery warm.

A temperature control apparatus for a building, the apparatus comprising: an electricity generator, operable to contribute to an electrical power supply for consumer appliances at the building; a heat transfer circuit adapted to circulate heat transfer fluid to cool the electricity generator; a heating system comprising a heat source for providing heat energy to a space heater for heating at least one zone of the building and to a hot water tank arranged to store a supply of hot water for the building, and a heat exchanger adapted to supplement the heat energy from the heat source with heat energy obtained from the heat transfer circuit; a user interface adapted to enable a user to select at least one of (a) a desired temperature for the at least one zone of the building, and a first time period during which the desired temperature is to be maintained; and (b) a second time period for the supply of hot water from the hot water tank; and the apparatus further comprising: a controller configured to determine when to operate the electricity generator based on at least one of: (i) the thermal capacity of the hot water tank; and (ii) the first time period, the desired temperature and the current temperature of the at least one zone of the building.

Synergistic Energy Ecosystem using a co-generation system and method wherein waste energy from waste heat producers within an enclosure including an electric generator is reclaimed to supply heat to the cold end of a heat pump within the enclosure for optimized use in space heating a habitat and to the management of the distribution of electricity from the generator so as to supply electricity to the habitat and to neighbouring habitats when efficient, cost-effective or required to do so by distribution policies managing the energy eco-system.