Provided is a cogeneration system that includes a plurality of fuel cell devices capable of supplying heat and power to a heat load and a power load and a control device connected to the fuel cell devices. The control device determines an operation mode on the basis of at least one of a heat demand value and a power demand value. The control device controls a power generation efficiency and a heat recovery efficiency by controlling the fuel cell devices on the basis of the operation mode determined.

Provided is a cogeneration system that includes a plurality of fuel cell devices capable of supplying heat and power to a heat load and a power load and a control device connected to the fuel cell devices. The control device determines an operation mode on the basis of at least one of a heat demand value and a power demand value. The control device controls a power generation efficiency and a heat recovery efficiency by controlling the fuel cell devices on the basis of the operation mode determined.

A water heating system can include a water heater having a tank, an inlet line, and an outlet line, where the inlet line provides unheated water to the tank, and where the outlet line draws heated water from the tank. The water heating system can also include multiple sensing devices, where each sensing device of the plurality of sensing devices measures a parameter associated with the tank. The water heating system can further include a controller communicably coupled to the plurality of sensing devices, where the controller determines an amount of heated water in the tank based on measurements made by the plurality of sensing devices.

An outdoor shower device includes a hollow water container, a gas bag disposed in the water container, and an inflating device configured to inflate the gas bag. The water container has a mouth, a water outlet pipe communicating with an inside of the water container, and a cover for tightly closing the mouth. An inside of the gas bag is in communication with the inflating device through a gas pip. When in use, the user pours water through the opening into the water container and inflates the gas bag by using the inflating device. As the gas bag is continuously inflated with gas, the water in the water container is discharged from the water outlet pipe for taking a comfortable shower.

A heat exchanger for a water heater having a burner includes a tube extending longitudinally along a centerline from a first end adjacent the burner to a second end. The tube defines a passage. Strips extend within the passage and are arranged about the centerline. Each strip includes a base and fins extending from opposite sides of the base such that flue gases from the burner flow from the first end to the second end of the outer tube and in channels between the fins.

A gas fueled water heater appliance may include a tank for storage of water, a chamber wall, a gas burner, a gas conduit, a support post, and a guide bracket. The chamber wall may define a combustion chamber and a conduit hole. The gas burner may be positioned adjacent to the tank and within the combustion chamber. The gas conduit may extend from the gas burner and through the conduit hole. The support post may be fixed to the gas burner within the combustion chamber. The guide bracket may be mounted within the combustion chamber and define a mounting point. The guide bracket may be in selective engagement with the support post at the mounting point. The guide bracket may include a pair of lateral arms extending outward from the mounting point toward the chamber wall to guide the support post to the mounting point.

A movable shower apparatus according to an embodiment of the present disclosure includes a body, a controller, a motor pump, a moving unit, and a purified water circulator. The body includes a purified water container and a wastewater container communicating with the purified water container. The controller provided on the body controls the flow rate and temperature of purified water. The motor pump draws the purified water from the purified water container and discharges the purified water. The moving unit carries the body. The purified water circulator draws external air, compresses the external air, and blows the compressed external air into the purified water container. The wastewater container allows the purified water in the purified water container to be introduced into the wastewater container. A heater is disposed within the purified water container to heat the purified water. The purified water circulator circulates the purified water from one side to the other side of the purified water container by blowing the compressed external air into the purified water container.

The present disclosure provides a water storage tank and a gas water heater. The water storage tank includes: a tank body provided with an interface at one end; an adapter provided with a water inlet connector, a water outlet connector, and a waste discharge connector; and a connection pipe installed in the tank body, one end of the connection pipe communicating with the water outlet connector, another end of the connection pipe being spaced apart from an end of the tank body away from the interface.

One illustrative energy recovery system disclosed herein includes a facility and a closed chilled water loop including a chilled water stream delivered to the facility and a returning water stream that is received from the facility. In this example, the system also includes a primary heat exchanger having a first fluid side and a second fluid side, the first fluid side is adapted to receive supply water and the second fluid side is adapted to receive at least a portion of the returning return water stream. The primary heat exchanger is adapted to effectuate heat transfer between the supply water flowing in the first fluid side and the returning water stream flowing in the second fluid side.

One illustrative energy recovery system disclosed herein includes a facility and a closed chilled water loop including a chilled water stream delivered to the facility and a returning water stream that is received from the facility. In this example, the system also includes a primary heat exchanger having a first fluid side and a second fluid side, the first fluid side is adapted to receive supply water and the second fluid side is adapted to receive at least a portion of the returning return water stream. The primary heat exchanger is adapted to effectuate heat transfer between the supply water flowing in the first fluid side and the returning water stream flowing in the second fluid side.