The present invention relates to a hot water storage tank (202, 302, 402, 502, 602, 702), defining a primly storage volume (204, 304, 404, 504, 604, 704), with at least one heat source (212, 312, 412, 512, 612, 712) positioned in and operable to directly heat water in the upper portion (207, 307, 407, 507, 607, 707) of the primary storage volume (204, 304, 404, 04, 604, 704), and a pump or other means (237, 337, 437, 537, 637) that draws water, from the lower portion (209, 309, 409, 509, 609, 709) of the tank into a heat transfer device (216, 316, 416, 516, 616, 716), situated in said upper portion (207, 307, 407, 507, 607, 707). The heat transfer device (216, 316, 416, 516, 616, 716) is configured to enable the transfer of heat from heated water in the upper portion (207, 307, 407, 507, 607, 707) to the drawn water prior to discharge into the water in the upper portion (207, 307, 407, 507, 607, 707).

A tank-style residential and light commercial hot water heater is provided. The tank-style residential and light commercial hot water heater can include a tank, an intake nipple for receiving a liquid into the tank, an outflow nipple for dispensing the liquid from the tank after heating, and a dedicated return nipple having a valve. The dedicated return nipple is configured to couple to a hot water recirculating system, and the valve is configured to open when the dedicated return nipple is coupled to the hot water recirculating system to allow the dedicated return nipple to receive a recirculated form of the liquid dispensed from the outflow nipple back into the tank. When not in use with a hot water recirculating system, the valve may be closed.

A cooling system for a heat source, such as a laser system, that includes a mixing valve mixing a cooling fluid from a hot line and a cold line and providing the mixed cooling fluid to the heat source, and a bladder tank having a bladder and including a hot side on one side of the bladder in fluid communication with the hot line and a cold side on an opposite side of the bladder in fluid communication with the cold line. A heat exchanger cools the cooling fluid flowing through the cold line. The cooling system is configured so that when the heat source is on and generating heat, cold cooling fluid from the cold side of the bladder tank is provided to the mixing valve and when the heat source is off and not generating heat, cold cooling fluid from the cold line fills the cold side of the bladder tank.

A cooling system for a mobile bulk tank that includes a heat exchanger disposed to remove heat from a top wall of the mobile bulk tank. A flow system that is configured to move coolant through the heat exchanger to cool the bulk tank.

Underground thermal energy storage in a cylindrical or n-gonal prism shape with a vertical axis, comprising an inner volume for holding a liquid, an outer wall, an inner wall around the inner volume, and a filling layer between the inner wall and the outer wall. The inner wall comprises a series of modular wall parts provided with a heat exchanger for exchanging thermal energy with the liquid. The modular wall parts, arranged in rings, contact the inner volume and have an elastic sealing limiting liquid flow between the inner volume and the filling layer and taking up thermal expansion of the modular wall parts. The filling layer comprises an insulating layer designed to keep the outer wall below 30 C. when the inner volume is at least 90 C., and a structural layer for maintaining the insulating layer and the inner wall's modular wall parts in position.

A cooling system may include a cooling pump, a cooling source, a thermal energy storage, a mixing valve, a recharge valve, a recharge pump. The mixing valve may be in fluid communication with a thermal load. A first input of the mixing valve may be in fluid communication with the thermal energy storage. A second input of the mixing valve may be in fluid communication with the recharge pump. Operation of the recharge pump may cause heated cooling fluid output from the thermal load to bypass the cooling pump and flow to the second input of the mixing valve. The recharge valve may be in fluid communication with the thermal energy storage and the cooling pump. The recharge valve may regulate a recharge fluid flow comprising cooling fluid received from the thermal energy storage.

The present invention relates to a buffer store comprising a closed vessel housing for accommodating a storage fluid, in particular water, wherein the vessel housing has at least one inlet opening, for the filling of the vessel housing with the storage fluid, and at least one equalization opening, which fluidically connects the vessel housing to the surroundings and permits a fluidic equalization with the surroundings. According to the invention, a gas-tight cover is also provided in the interior of the vessel housing, which cover is capable of reliably protecting the storage fluid against mixing with other fluids, for example the ambient air.

There is herein described energy storage systems. More particularly, there is herein described thermal energy storage systems and use of energy storable material such as phase change material in the provision of heating and/or cooling systems in, for example, domestic dwellings.

A hot water supply system that can reduce energy consumption is provided. The hot water supply system includes a liquid heater for heating a liquid, a liquid-water heat exchanger, a water-heating circuit in which the liquid is circulated between the liquid heater and the liquid-water heat exchanger, a lower outward path for leading water from a lower part of a hot water storage tank to the liquid-water heat exchanger, the upper return path for leading the water from the liquid-water heat exchanger to an upper part of the hot water storage tank, a middle outward path for leading the water from a middle part of the hot water storage tank to the liquid-water heat exchanger, a middle return path for leading the water from the liquid-water heat exchanger to a middle part of the hot water storage tank.

A device and method for recovering energy from a hot medium, in particular from hot wort or hot mash for a beer brewery, including a first heat exchanger device for a heat transfer medium that is arranged in particular downstream of a device for heating, boiling or keeping wort or mash warm and is designed such that the heat transfer medium can be heated while cooling preferably wort or mash, wherein at least one heat consumer of the brewery is heated with the heat transfer medium. The heat transfer medium cooled down during heating the heat consumer can be recirculated to the first heat exchanger device in the circuit.