A water preconditioner system comprising a user interface for manually or automatically receiving inputs from a user, a mixing assembly including a plurality of control valves coupled to hot and cold water supply lines, and a controller in communication with the plurality of control valves and the user interface for controlling the operation of the system. The controller is configured to operate in a plurality of modes to precondition the water to one of a desired preset water dispensing temperature or a target temperature different from the desired preset water dispensing temperature.

The present invention provides a combined heating and hot-water boiler for heating and hot-water. The combined heating and hot-water boiler comprises: a main heat exchanger which heats heating water through heat exchange; a hot-water heat exchanger to which the heating water heated by the main heat exchanger is supplied, and which heats tap water into hot water through heat exchange with the heating water; and a control unit which controls the flow of the heating water having passed through the hot-water heat exchanger to control the formation of at least one of a first flow path for supplying, to an object to be heated, the heating water having passed through the hot-water heat exchanger, and a second flow path for supplying, to the main heat exchanger, the heating water having passed through the hot-water heat exchanger.

An energy-saving system using electric heat pump to recover flue gas waste heat for district heating uses flue gas waste heat recovery tower to absorb the sensible and latent heat in the high-temperature flue gas by direct contact heat and mass transfer. The circulating water is sprayed from the top and the flue gas flows upwards in the tower. The electric heat pump is indirectly connected with circulating water through the anti-corrosion and high-efficiency water-water plate heat exchanger. The return water of the heat-supply network enters the electric heat pump through the anti-corrosion and high-efficiency water-water plate heat exchanger and exchanges heat indirectly with the high-temperature circulating water. The electric heat pump uses the electric energy of the power plant as the driving power.

An energy-saving system using electric heat pump to recover flue gas waste heat for district heating uses flue gas waste heat recovery tower to absorb the sensible and latent heat in the high-temperature flue gas by direct contact heat and mass transfer. The circulating water is sprayed from the top and the flue gas flows upwards in the tower. The electric heat pump is indirectly connected with circulating water through the anti-corrosion and high-efficiency water-water plate heat exchanger. The return water of the heat-supply network enters the electric heat pump through the anti-corrosion and high-efficiency water-water plate heat exchanger and exchanges heat indirectly with the high-temperature circulating water. The electric heat pump uses the electric energy of the power plant as the driving power.

A water heater is provided that heats water in a storage tank and discharges the heated water. The water heater includes a storage tank configured to store water, at least one first temperature sensor configured to sense a temperature of the water stored in the storage tank, a second temperature sensor configured to sense a temperature related to an outside of the water heater, a first heat exchanger comprising at least one heating element configured to heat the water, a second heat exchanger comprising a heat pump system and configured to heat the water, and a controller configured to control at least one of the first heat exchanger and the second heat exchanger based on a temperature sensed by the second temperature sensor and a set water temperature.

An automatic carbon monoxide power cut-off system for a carbon monoxide source, where the system includes a microprocessor co-located with the carbon monoxide source, and a carbon monoxide sensor in wireless communication with the microprocessor and configured to detect presence of carbon monoxide and wirelessly transmit a sensor signal to the microprocessor, and the microprocessor being configured to generate a trigger signal in response to the sensor signal indicative of carbon monoxide exceeding a predetermine level. A power cut-off device is coupled to the microprocessor and is configured to automatically cut off power to the carbon monoxide source in response to the trigger signal, so that the carbon monoxide source automatically stops generating carbon monoxide. The carbon monoxide source may include a furnace and a power generator.

An automatic carbon monoxide power cut-off system for a carbon monoxide source, where the system includes a microprocessor co-located with the carbon monoxide source, and a carbon monoxide sensor in wireless communication with the microprocessor and configured to detect presence of carbon monoxide and wirelessly transmit a sensor signal to the microprocessor, and the microprocessor being configured to generate a trigger signal in response to the sensor signal indicative of carbon monoxide exceeding a predetermine level. A power cut-off device is coupled to the microprocessor and is configured to automatically cut off power to the carbon monoxide source in response to the trigger signal, so that the carbon monoxide source automatically stops generating carbon monoxide. The carbon monoxide source may include a furnace and a power generator.

Liner device, adapted to be mounted between a burner box and a tube interface plate of a furnace. The liner device includes a base section, one or more tube sections, and one or more angle fasteners. The base section includes a shielding layer formed from a first flexible mesh of flame-resistant fibers, the shielding layer defining a first surface that is configured to face the burner box, a second surface opposite to the first surface, and a medial region with a through-hole forming a passageway through the shielding layer. The tube section is composed essentially of a second flexible mesh of flame-resistant fibers formed into a tubular shape that defines an internal channel around a nominal axis. A proximal end of the tube section is positioned at the base section, such that the channel opens into the through-hole and that the tube section projects from the second surface and in a direction faced by the second surface. The angle fastener has a base portion that is positioned along and fixed to the second surface of the shielding layer. The angle fastener further has a leg portion that projects towards the second direction and is positioned along and fixed to an outer surface of the tube section at or near the proximal end thereof.

The present disclosure provides methods and systems for tracking temperature profile of water in a hot water storage tank. The method performed by a control unit includes monitoring flow of water at one or more inlets and one or more outlets included in the tank to determine current locations of a plurality of water layers within the tank. The plurality of water layers changes corresponding positions within the tank based on water entering within and exiting from the tank. The method includes receiving a series of temperature values measured at a series of time instances from at least one temperature sensor mounted to the tank. The method includes electronically generating a temperature profile of the tank based at least on the current locations of the plurality of water layers and the series of temperature values.

An equipment determination method of a cogeneration system includes the steps of: calculating a total hot water supply load for each day over a predetermined period longer than a specific period based on each unit hot water supply load for hour according to hot water supply use by consumers; setting as a representative period a specific period on which the total hot water supply load becomes at least a low load among the calculated total hot water supply load for each day; determining a capacity of the cogeneration equipment based on the total hot water supply load on the set representative period; and determining a capacity of the plurality of hot water storage tanks based on an amount of hot water supply load exceeding the capacity of the determined cogeneration equipment among each unit hot water supply load for two or more divided periods including the set representative period.