31results about How to "Heat is lost" patented technology

An apparatus for ventilation systems includes an element for the transfer of heat from warm exhaust air (taken from inside a building) to cooler exterior fresh air which is drawn into the building. The present invention in particular provides an apparatus whereby, during a defrost cycle, interior air may circulate through both of the fresh air and exhaust air paths for delivery back into the building, i.e. the warm interior air, used as defrost air, may be able to circulate from the interior of the building into the ventilation apparatus and back to the interior of the building. The apparatus can thus use interior air as defrost air while diminishing or avoiding the creation of a negative air pressure in the building.

The method and system operate to calibrate a transmission laser of the dense wavelength division multiplexer (DWDM) and to lock the laser to a selected transmission wavelength. In one example, the transmission laser is a widely tunable laser (WTL) to be tuned to one of a set of International Telecommunications Union (ITU) transmission grid lines for transmission through an optic fiber. To lock the WTL to an ITU grid line, a portion of the output beam from the WTL is routed through the etalon to split the beam into a set of transmission lines for detection by a detector. Another portion of the beam is routed directly to another detector. A wavelength-locking controller compares signals from the two detectors and adjusts the temperature of the etalon to align the wavelength of one of the transmission lines of the etalon with the wavelength of the output beam, then controls the WTL in a feedback loop to lock the laser to the etalon line. The wavelength-locking controller thereafter monitors the temperature of the etalon and keeps the temperature constant to prevent any wavelength drift in the etalon. In one example, the etalon is a silicon etalon configured to have finesse of about 20 and to provide a free spectral range of about 8 GHz. With these parameters, the system is able to lock the wavelength of the WTL to within a precision of about 0.2 GHz.

A portable floating hot tub that is easy to assemble and take down and can be used in environments with extremely cold and turbulent water. The hot tub has three main components: a collapsible frame made of connected rigid members, an insulated liner sized and shaped to closely fit against the deployed frame and form a subassembly, and an inflatable pontoon that may have a central aperture for receiving the subassembly. The pontoon is first inflated and placed on the body of water, after which the frame and liner subassembly are placed over the central aperture. Filling the internal volume defined by the insulated liner with water causes the subassembly to descend within the pontoon. Cooperating means on the subassembly and / or pontoon prevent the subassembly from passing completely through the central aperture. A source of heated water such as a portable heater having a heating capacity of at least 30,000 BTUs rapidly heats up the water within the hot tub. The system components can be transported in one or more carry bags of less than 100 pounds and deployed and taken down by one person in an extremely small space, such as on a boat.

Embodiments of the subject invention relate to a method and apparatus for thermally protecting a product, such as when storing and / or shipping a product, so as to control the temperatures the products are exposed to. Embodiments can increased the amount of time the product and / or portions of the product experience a desired temperature range and / or reduce the amount of time the product and / or portions of the product experience temperatures outside of the desired temperature range and / or experience an undesirable temperature range. Embodiments can incorporate thermally conductive materials, such as aluminum sheets, positioned around and / or near the product positioned inside a packaging container, such that the conductive materials conduct heat from one or more locations in the interior of the package to one or more other locations in the interior of the package. These thermally conductive materials can be referred to as conductive equalizers. The conductive equalizers can conductively transfer heat from the hotter portions of the interior of the container to cooler portions of the interior of the container and / or from portions of the interior desired to be cooled to the cold bank. Conducting heat from hotter portions to cooler portions, or from portions to be cooled to the cold bank can result in a more uniform temperature distribution around the product.

A casting ladle has a body (2) with a base (3) and walls (4, 6, 8) made of a laminated composite ceramic material that includes multiple layers of a woven fiber reinforcing fabric embedded in a ceramic matrix. A rigid support element (20) for attaching the ladle to a handling device is embedded within the composite ceramic material. In a preferred form, the reinforcing fabric is made of woven glass and the matrix material includes calcium silicate and silica.

Structures and methods for controlling road temperature over an underpass space are disclosed, including a structure comprising: footings underlying the road supporting a support assembly comprising: an inner shell; a plurality of beams surmounting the inner shell; an insulating material for thermally isolating the road and the remainder of the support assembly from the underpass space; an outer shell; a temperature control assembly; temperature sensors disposed in the road and the support assembly; and a computer processor configured to receive temperature and weather forecast data; predict changes to the temperature of the support assembly and the road based on the temperature and forecast data; and control the application or removal of heat to the support assembly, based on the predicted changes to the temperature of the support assembly and the road, resulting in the road maintaining a temperature within a predetermined range.

An optical medical instrument, in particular an endoscope or exoscope, has an elongate tubular shaft, a heat source generating lost heat, and a heat pipe which extends inside the shaft, in the longitudinal direction of the shaft, and has a distal heat pipe end and a proximal heat pipe end, wherein the heat pipe is thermally coupled to the heat source in order to collect heat from the latter and remove the heat from the heat source. Between the distal heat pipe end and the proximal heat pipe end, the heat pipe is coupled thermally conductively and two-dimensionally to the shaft over at least a partial length of the heat pipe and over at least a partial circumference of the heat pipe, in order to remove heat from the heat pipe, over at least a partial length and over at least a partial circumference of the shaft, to the environment.

An electrochemical storage device has an anode chamber filled with anode material during operation, and a cathode chamber filled with cathode material. The anode chamber is separated from the cathode chamber by solid body electrolyte guiding ions, and the anode chamber is limited on one side by the solid body electrolyte, on another side by a wall at least partially surrounding the solid body electrolyte. The wall is surrounded by a head part of the device, by a base part arranged opposite the head part and / or by a lateral part arranged between the head and base part. The wall has an electrical conductive wall section as an anode to the anode chamber, an at least partially flat, electrical conductive line section electrically connected to the wall section by a surface, and conductivity per surface of the line section greater than conductivity of the wall per surface of the wall section.