In one aspect, a first device includes a processor and storage accessible to the processor. The storage bears instructions executable by the processor to receive input from a water heater meter that monitors a water heater and provide an output comprising information pertaining to a time estimate related to the provisioning of heated water based on the input.

A method and a device to heat water in an electrical boiler are disclosed. The method include the steps of storing user's requests of hot water in association with corresponding times of requests, heating water in advance to a next user's request, wherein the next user's request is estimated on the stored user's requests. The device is the hardware implementing the method.

The autonomous energy saving device (2) enabling the control of a water heater (1) connected to a power grid comprising a phase P, a neutral N and a protective conductor T operating on a permanent power supply or during rate periods using a switch or timer, said energy saving device (2) comprises inputs E1, E2, E3 and the outputs S1, S2, S3 and between inputs E1 and E2 and the outputs S1 and S2 at least one primary circuit board (7) comprising at least one electronic component (3, 4) and a control algorithm to remove or reduce the heating times of the water heater (1) without changing the technical characteristics of the water heater, and in order to adapt its operation to the needs of the user.

The present invention relates a heating control system through prediction of user's sleep time based on a big data analysis using a smartphone, comprising a user terminal including a plurality of sensors that generate all kinds of sensor data; a big data server that stores all kinds of sensor data; a sleep prediction unit that calculates sleep prediction time of a user based on all kinds of sensor data; and a heating apparatus that determines whether the user currently sleeps or not based on the calculated sleep prediction time and changes an indoor heating control method according to whether the user sleeps or not.

Disclosed herein are WIFI and could enabled temperature control systems. The temperature control systems are configured to receive user temperature settings and preferences, and control a water heater based on the user temperature settings and preferences. The temperature control systems include two or more sampling rates for enabling a higher efficiency of operation compared to conventional water heaters.

This invention relates, but is not limited to, a method, a device, a computer program product and/or apparatus for determining the mode of operation of a boiler. The invention determines the mode of operation of a boiler through receiving a time series of electrical energy data of the boiler, determining energy events in the electrical energy data, determining a plurality of parameters of the energy events, and using an obtained model to determining the mode of operating of the boiler based on the obtained model and the plurality of parameters of the energy events. The invention further comprises a method of obtaining the model.

This invention relates, but is not limited to, a method, a device, a computer program product and/or apparatus for determining the mode of operation of a boiler. The invention determines the mode of operation of a boiler through receiving a time series of electrical energy data of the boiler, determining energy events in the electrical energy data, determining a plurality of parameters of the energy events, and using an obtained model to determining the mode of operating of the boiler based on the obtained model and the plurality of parameters of the energy events. The invention further comprises a method of obtaining the model.

Hot water heating system comprising one or more water heaters with at least one water heating mechanism, and a heating-control storage tank generally configured to store heated water in a temperature stratified manner where hotter water tends to be separated from cold water. The heating-control storage tank can receive thermal energy or hot water from the water heater, send thermal energy or water to the water heater as its makeup water, and provide hot water directly to end users. The water heater may or may not be used to provide hot water to end users. The system is electronically controlled using a processor, various sensors, a recirculation pump, and electronically actuated valves. Depending on hot water needs and energy costs, the system controls water heating schedule and amount of hot water stored in the heating-control storage tank by changing system operation modes to minimize energy costs while providing reliable service.

The present invention relates to a sensor for measuring temperature of a fluid within a vessel, the vessel having a first region and a second region and the fluid having a temperature profile extending between the first region and the second region, the sensor comprising an array of elements, each element having a temperature-dependent parameter, the array being capable of deployment within or adjacent the vessel such that the array extends along the vessel for measuring the temperature profile, the elements of the array being coupled together between an input and an output, the input being coupled or capable of being coupled to a driving source for driving the sensors, and the output being coupled or capable of being coupled to a detector for measuring an aggregate of the temperature-dependent parameter from the array of elements. The invention further relates to a fluid temperature controller comprising a first input for receiving a first signal indicating a measurement of an aggregate of a temperature-dependent parameter from a sensor deployed within or adjacent a vessel containing a fluid having a temperature profile, a second input for receiving a second signal indicating a (preferably absolute) temperature of the fluid in the vessel and a processor configured to calculate a total thermal energy of the fluid in the vessel based on the first and second signals. The invention also relates to a combination comprising a sensing arrangement and a controller; a device; and a system.

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.