Described are various embodiments of a reactive chemical exothermic heating element and system. The exothermic chemical heating element has a reactive solid holder having a channel therein with an exposed end. A reactive chemical is disposed in the channel and able to exothermically react with a suitable liquid, contained in a first vessel. On exposure to the suitable liquid, a gas is generated in the channel and a gas bubble emerges from the channel thereby limiting further suitable liquid from accessing the reactive chemical, and thus controlling the rate of the exothermic reaction and the energy released over a given time period to the suitable liquid. A second vessel may be disposed in the suitable liquid so as to heat any contents of the second vessel via a liquid bath of the second vessel.

A combined heat and power system generates energy and efficiently captures a percentage of such energy that would otherwise be lost to, among other things, control the temperature and humidity of a house or dwelling.

A multi-functional retrofit cover plate assembly and method for an electric water heater to provide interconnection with an alternative energy system to heat water in a water holding tank of the electric water heater. The cover plate is adapted for replacement connection over a bottom access opening formed in an outer casing of the electric water heater which permits access to a bottom resistive heating element and electrical connections. The retrofit cover plate is shaped to define an internal dedicated compartment. A dual resistive heating element is provided for replacement of the bottom resistive heating element. An electronic switch unit is further provided and it has a power cut-off switch for connection to an alternative supply voltage. A temperature sensor is provided for mounting against an outer surface of the tank of the water heater to feed actual temperature signals of water temperature within the tank, in a lower region thereof, to the electronic switch unit which operates the power cut-off switch upon a predetermined temperature having been attained in the tank of the water heater. The retrofit cover plate and the assembly also make it possible to covert the water heater to a high temperature water heater or to adapt the electric water heater to a thermal fluid heat source.

Provided is a gas furnace including a primary heat exchanger and a secondary heat exchanger through which a combustion gas produced by the combustion of a fuel gas flows. The gas furnace includes: a coupling box serving as an intermediary to connect the primary heat exchanger and the secondary heat exchanger; a collect box connected to the secondary heat exchanger, for letting in the combustion gas passed through the secondary heat exchanger; an inducer connected to the collect box, for inducing a flow of the combustion gas; and a bypass pipe connected to one side of the coupling box and including a bypass pipe for guiding the combustion gas passed through the primary heat exchanger to a hot water supply tank for supplying hot water to an indoor space.

A water heater can include a tank. The water heater can also include a heat exchanger that includes multiple flue tube segments disposed within the tank, where the flue tube segments include a thermally-conductive material. The heat exchanger can further include a heating system that heats a fluid to create a heated fluid, where the heating system further circulates the heated fluid through the flue tube segments, where the flue tube segments absorb thermal energy from the heated fluid and subsequently dissipate the thermal energy into the tank to convert the unheated water to the heated water. The water heater can also include a controller coupled to the heating system, where the controller operates the heating system outside of a normal heating cycle when the controller determines that condensation has accumulated in the flue tube segments, where operating the heating system outside of the normal heating cycle removes the condensation.

A combined heat and power system generates energy and efficiently captures a percentage of such energy that would otherwise be lost to, among other things, control the temperature and humidity of a house or dwelling.

A system is provided for cooling the heat generated by a miner, the system includes a liquid cooling chassis comprising a miner and a dielectric fluid enclosure and a water tank kit for storing water, the water tank kit includes a coil with said dielectric fluid, wherein the heat generated from said miner is transferred to the water stored in said water tank kit by pumping the heated dielectric fluid from the liquid cooling chassis into the coil in the water tank kit to produce a heat source thereof.

A combined heating and power system is configured to generate energy as well capture a large percentage of energy that would otherwise be lost using components, including heat transfer components, embedded within a vessel to transfer energy in the form of heat to liquid within the vessel.

Provided is a refrigeration cycle apparatus configured to perform a heating operation and a simultaneous heating and hot-water supply operation. The refrigeration cycle apparatus is configured to execute an operation mode circulating refrigerant through, in order, a discharge outlet of a compressor, a first heat exchanger, an expansion device, a second heat exchanger provided to a water tank, and a suction inlet of the compressor, and causing the refrigerant flowing through the second heat exchanger to evaporate by heat generated by a heat source provided to the water tank.

A combined heat, cooling and power system is configured to generate energy as well capture a large percentage of energy that would otherwise be lost using components, including heat transfer components, embedded within a vessel to transfer energy in the form of heat to liquid within the vessel.