摘要:
An improved system and method for controlling the temperature of a resistance heater in a heating, ventilation and air-conditioning (“HVAC”) system is disclosed. The control circuit and method includes three separate thermostats per heater leg and are designed to trip at three, sequential pre-selected temperatures to address certain issues associated with prior art designs for thermal overload protection. One of the thermostats is of an automatically resettable type wherein the remaining two are of a “one-shot” design and will remain open until there is human intervention.
摘要:
A system and method of using one or more DC-DC/DC-AC converters and/or alternative devices allows strings of multiple module technologies to coexist within the same PV power plant. A computing (optimization) framework estimates the percentage allocation of PV power plant capacity to selected PV module technologies. The framework and its supporting components considers irradiation, temperature, spectral profiles, cost and other practical constraints to achieve the lowest levelized cost of electricity, maximum output and minimum system cost. The system and method can function using any device enabling distributed maximum power point tracking at the module, string or combiner level.
摘要:
A refrigeration system is provided. The refrigeration system includes at least one thermal blocking thermotunneling device. The thermal blocking thermotunneling device comprises a first and a second surface separated by a nanoscale gap of less than about 20 nm, such that tunneling of electrons causes a unidirectional transfer of heat from the first surface to the second surface. Further, the at least one thermal blocking thermotunneling device has a thermal back path of less than about 70 percent.
摘要:
A method of manufacturing a heat transfer device including providing first and second thermally conductive substrates that are substantially atomically flat, providing a patterned electrical barrier on the first or second thermally conductive substrates and disposing a low work function material on the first or second thermally conductive substrates in an area oriented between the patterned electrical barrier in a configuration in which the first and second thermally conductive substrates are positioned opposite from one another. The method also includes bonding the first and second thermally conductive substrates in the configuration and extracting a plurality of units having opposite sections of the first and second thermally conductive substrates, each unit having a portion of the patterned electrical barrier disposed about the low work function material.
摘要:
An apparatus and method for analyzing an apparatus, typically an electrical distribution system is provided. The apparatus and method is particularly useful for analyzing selective electrical distribution systems. The apparatus is generally a software system including a solver system for generating an output from an input presented to the solver system. The input is a mathematical representation of at least a portion of the electrical distribution system. In one embodiment, the input is presented to a model within the solver system. The model represents at least a portion of the electrical distribution system. The software system is capable of interfacing output data from one or more models with additional models for analyzing generally how devices within an electrical distribution system behave under certain conditions.
摘要:
A system for implementing a design for six sigma process having a plurality of sub-processes each having a plurality of sub-steps. The system includes an independent main application for implementing the design for six sigma process. A series of independent sub-process applications each implements one sub-process of the design for six sigma process. A tool library containing a plurality of executable tools is accessible by the main application and sub-process applications to access and execute the plurality of executable tools. A communications path interconnects the main application, the sub-process applications, and the tool library.
摘要:
A semiconductor device is provided. The semiconductor device includes an avalanche photodiode unit and a thyristor unit. The avalanche photodiode unit is configured to receive incident light to generate a trigger current and comprises a wide band-gap semiconductor. The thyristor unit is configured to be activated by the trigger current to an electrically conductive state. A semiconductor device and a method for making a semiconductor device are also presented.
摘要:
An electrical device includes a blocking layer disposed on top of a substrate layer, wherein the blocking layer and the substrate layer each are wide bandgap semiconductors, and the blocking layer and the substrate layer form a buried junction in the electrical device. The device comprises a termination feature disposed at a surface of the blocking layer and a filled trench disposed proximate to the termination feature. The filled trench extends through the blocking layer to reach the substrate layer and is configured to direct an electrical potential associated with the buried junction toward the termination feature disposed near the surface of the blocking layer to terminate the buried junction.
摘要:
A semiconductor device is provided. The semiconductor device includes an avalanche photodiode unit and a thyristor unit. The avalanche photodiode unit is configured to receive incident light to generate a trigger current and comprises a wide band-gap semiconductor. The thyristor unit is configured to be activated by the trigger current to an electrically conductive state. A semiconductor device and a method for making a semiconductor device are also presented.
摘要:
A thyristor device includes a semiconductor body and a conductive anode. The semiconductor body has a plurality of doped layers forming a plurality of dopant junctions and includes an optical thyristor, a first amplifying thyristor, and a switching thyristor. The conductive anode is disposed on a first side of the semiconductor body. The optical thyristor is configured to receive incident radiation to generate a first electric current, and the first amplifying thyristor is configured to increase the first electric current from the optical thyristor to at least a threshold current. The switching thyristor switches to the conducting state in order to conduct a second electric current from the anode and through the semiconductor body.