4 results about "Warm season" patented technology

The application discloses a plateau permafrost area controllable cold region maintaining device, relates to the roadbed maintenance technical field of plateau permafrost area, and comprises a hot rod body, a protection structure is installed at the top of the hot rod body, a transmission mechanism is installed at the top of the protection structure, an environment sensing machine is installed at the top of the transmission mechanism, and a damping mechanism is installed at the top of the transmission mechanism and at the side of the environment sensing machine, the cooperation of the environment sensing machine, the protection structure and the transmission mechanism realizes the full-season self-adaptive regulation and control of automatic covering in the warm season and automatic opening in the cold season, manual intervention and external power driving are not needed, the hot rod body working mode can be automatically switched according to the change of the environment temperature, the technical defects that heat backflow and permafrost warming and thawing are prone to occurring in the summer of the traditional hot rod are solved, and the permafrost temperature control stability and the roadbed safety are remarkably improved.

A photothermal adsorption refrigeration device and its application method for railway subgrades in permafrost regions are disclosed, comprising an above-ground photothermal drive and control unit and an underground phase change heat transfer unit. The device utilizes a metal halide-ammonia chemisorption cycle, using solar photothermal drive to generate a pressure potential difference through desorption / adsorption to replace a mechanical compressor, achieving a system with no moving parts and zero carbon emissions. The method includes geological survey and cooling capacity assessment, selection of device parameters and working fluid, subgrade cross-section layout based on deformation control, construction and commissioning, day / night / seasonal multi-field coupled adaptive operation, and closed-loop feedback. This invention overcomes the limitations of traditional heat pipes that remain dormant in warm seasons. It forcibly extracts heat from the permafrost during the warm season and enhances refrigeration using extremely low temperatures during the cold season, forming a synergistic dual-effect refrigeration of "active in summer and enhanced in winter." This can raise the upper limit of permafrost and control subgrade settlement to the millimeter level, making it suitable for plateau railway engineering, significantly improving the long-term stability of the subgrade and reducing operation and maintenance costs.

The utility model relates to the field of pile foundation engineering in permafrost regions, and particularly discloses an assembly type anti-freezing pile pulling foundation for overhead transmission lines in permafrost regions, which comprises a strip-shaped base, a regular conical upright post, a heat insulation plate and a bearing platform which are sequentially arranged from bottom to top, the upper part of the regular conical upright post is a hollow circular truncated cone, and the lower part of the regular conical upright post is a hollow cylinder; the top end of the regular-cone-shaped stand column is sequentially connected with a heat insulation plate and a bearing platform through bolts, the pile bottom is connected with a strip-shaped base through a flange, the bearing platform and the strip-shaped base are each of a prefabricated assembly type structure, and the heat insulation plate is an asbestos plate. The pile foundation is a hollow body and is light in weight, the regular-cone-shaped stand columns can fundamentally reduce tangential frost heaving force, so that upward pulling displacement of the pile body is reduced, the heat insulation plates can effectively prevent radiation heat from being transmitted to soil around the pile in warm seasons, the frozen soil upper limit of the soil around the pile is improved, the stability of the soil around the pile is enhanced, meanwhile, all the components can be flexibly disassembled and assembled, and construction is convenient. Construction is fast and convenient, and application and popularization are facilitated.

Techniques are disclosed for modular outdoor umbrella systems comprising an umbrella frame, a substantially transparent canopy and a substantially opaque canopy. Initially, the substantially transparent canopy is removably installed on the umbrella frame by a user. This first canopy provides warmth and visibility during the colder seasons while providing protection from the ultraviolet rays of the sun. During the warmer seasons, the user interchanges the canopy with a substantially opaque canopy. This second canopy provides shade and cooling effect. The decision to interchange is based on a number of factors. These include performance attributes of the canopies, the prevailing environmental conditions and personal preference(s) of the user. In embodiments, a multiplicity of canopies are provided that can be modularly and removably installed by the user as needed based on the above factors. In other variations, a heatshield cover is provided that can be removably deployed over an underlying transparent canopy based on the above factors.