Provided are systems and methods for managing a level of heat provided by a processing module and a heating mechanism. In one example, a method includes determining, by a system such as a management control system, that a demand for water from a hot water reservoir is increasing. The hot water reservoir may serve as a heat sink for a processing module and may include a heating mechanism adapted to provide heat to the hot water reservoir separately from the processing module. A determination may be made as to whether the processing module is able to produce enough heat to meet the demand. If the processing module is not able to produce enough heat to meet the demand, the heat output of the heating mechanism may be increased to provide additional heat to the water in the hot water reservoir.

Methods and compositions for controlling and monitoring residential and commercial pumping systems. Preferably, the controlling and monitoring functions include a remotely located controller component capable of displaying alerts and/or from which a user may input commands regulating the functioning of the plumbing system. In particularly preferred examples, the plumbing system is an on command hot water system in which hot water availability, use and energy efficiencies and conservation are monitored and maximized.

A water heating system can include a water heater having a tank, and a first temperature sensor disposed toward a top end of the tank to measure a first temperature and a second temperature sensor disposed toward a bottom end of the tank to measure a second temperature. The water heating system can further include a controller communicably coupled to the first temperature sensor and the second temperature sensor, where the controller determines an amount of heated water in the tank based on a plurality of algorithms and measurements made by the first and second temperature sensors. The plurality of algorithms solves for at least one calculated temperature for at least one point between a first location of the first temperature sensor and a second location of the second temperature sensor, where the at least one calculated temperature is used to determine the amount of heated water in the tank.

A water heating system can include a water heater having a tank, and a first temperature sensor disposed toward a top end of the tank to measure a first temperature and a second temperature sensor disposed toward a bottom end of the tank to measure a second temperature. The water heating system can further include a controller communicably coupled to the first temperature sensor and the second temperature sensor, where the controller determines an amount of heated water in the tank based on a plurality of algorithms and measurements made by the first and second temperature sensors. The plurality of algorithms solves for at least one calculated temperature for at least one point between a first location of the first temperature sensor and a second location of the second temperature sensor, where the at least one calculated temperature is used to determine the amount of heated water in the tank.

A liquid heating system includes an instantaneous heater (18) having an inlet (20) connected to a reservoir (62). The outlet (22) of the heater is connected to fixtures (72) which use the heated liquid, and is also connected through a return connection (30) to the reservoir. In an idle mode, a pump 40 draws liquid from the reservoir (62), so that the liquid circulates through the heater and back to the reservoir. A controller (52) actuates the heater to heat the liquid to a first setpoint temperature, so that the liquid in the reservoir stabilizes at the first setpoint temperature. In a supply mode, some or all of the heated liquid flows from the outlet to the fixtures (72). Cold liquid is admitted from a supply (60) to the reservoir, and cold liquid desirably also is supplied to the heater inlet along with liquid from the reservoir, so that the heater inlet receives a combination of these. The controller controls the proportion of cold liquid to liquid from the reservoir in the combination, so as to maintain the heater at a setpoint heating rate while also maintaining the temperature of liquid discharged from the heater outlet at or near a setpoint temperature.

A water heater appliance includes an electronic mixing valve configured for adjusting a ratio of cold water from a cold water inlet conduit to hot water from a hot water outlet conduit at a mixed water outlet of the electronic mixing valve. A flow meter is mounted to the mixed water outlet conduit or the cold water inlet conduit. A controller is configured to calculate a flow rate of hot water through the hot water outlet conduit based on a temperature measurement from each of a mixed water temperature sensor, a cold water temperature sensor and a hot water temperature sensor and a flow rate measurement from the flow meter.

A water heater appliance includes an electronic mixing valve configured for adjusting a ratio of cold water from a cold water inlet conduit to hot water from a hot water outlet conduit at a mixed water outlet of the electronic mixing valve. A cold water bypass conduit extends between the cold water inlet conduit and the mixed water outlet conduit. A cold water bypass valve is on the cold water bypass conduit. A controller is configured to close the cold water bypass valve when a temperature measurement from a mixed water temperature sensor is less than a threshold temperature.

Disclosed herein are WIFI and cloud 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.

Disclosed herein are WIFI and cloud 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.

In a temperature control apparatus for controlling the temperature of a load by supplying high-temperature circulating liquid to the load, a device in which a helical channel portion of a first heat exchange channel through which circulating liquid flows is housed in a second heat exchange channel formed of a channel space in a hollow shell through which coolant flows is used as a heat exchanger for cooling the circulating liquid, cylindrical members are individually fitted on an inflow channel portion and an outflow channel portion connected to opposite ends of the helical channel portion of the first heat exchange channel, and the cylindrical members are each fixed to the shell of the heat exchanger with a weld.