6 results about "Cold 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.

The application discloses a method for fermenting low-temperature chicken manure. In view of the problem that the prior art cannot efficiently and continuously ferment high-moisture fresh chicken manure in the cold season (environmental temperature <= 0 DEG C), the application provides a dynamic fermentation method based on biological heat self-circulation, which comprises the following steps: when the environmental temperature is greater than or equal to 5 DEG C, at least two fermentation pile heaps in a high-temperature fermentation state are established in advance (start-up stage); when the environmental temperature is less than or equal to 0 DEG C, one high-temperature pile heap is selected in circulation, high-temperature fermentation materials (central temperature >= 60 DEG C) in the high-temperature pile heap are mixed with low-temperature fresh chicken manure to be treated, auxiliary material straw powder and fermentation bacterial agents according to a specific weight ratio, and the sensible heat of the high-temperature materials is used to make the initial temperature of the mixed materials rise to more than 20 DEG C; subsequently, part of the mixed materials is removed for composting, and the remaining materials are left in the original position to continue fermentation as a subsequent heat source, so that the dynamic balance of continuous feeding and discharging is realized. The application does not need external energy, and realizes open-air continuous and efficient fermentation and resource utilization of chicken manure in the cold environment.

This disclosure relates to adaptive thermal control for data centers and IT equipment. A data center thermal control system includes: a local cooler configured to cool a local coolant used for cooling electronic hardware; an external heat exchanger configured to exchange heat from a fluid to outside air; and a fluid circulation system configured to transfer heat from the local cooler to the external heat exchanger by circulating at least one fluid cooling medium, the fluid circulation system including a cold section pointing towards the air cooler. The thermal control system also includes one or more processors and a non-transitory computer-readable medium storing instructions that, when executed by the one or more processors, cause the one or more processors to control the external heat exchanger to cool the fluid in the cold section to a first target temperature during hot seasons and to cool the fluid in the cold section to a lower target temperature during cold seasons.

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 discloses a kind of seasonal frozen ground area tunnel mouth anti-freezing structures, belong to the field of tunnel disease prevention and cure.To solve the safety problem caused by seasonal frozen ground area tunnel mouth frost heaving and leakage water, the structure includes: drainage component, containing capillary drainage layer and the heat preservation drainage ditch being communicated with it along tunnel datum plane annularly laid, and optional central drain pipe and transverse drainage blind ditch, for draining the moisture of tunnel structure inside and peripheral soil body;Heating assembly, for laying the electric heating layer below the capillary drainage layer;Power supply component, preferably solar power supply device, for the power supply of electric heating layer;And control component, start-stop of the electric heating layer is controlled by temperature sensor and temperature sensing switch.The utility model is combined by intensifying active exclusion to frost heaving source moisture and temperature control adaptive heating, and using solar power supply, can effectively prevent tunnel mouth from producing frost damage in cold season, improve structural durability and driving safety, and have the characteristics of energy saving and environmental protection.

This utility model discloses a prefabricated slab installation design structure, belonging to the field of building decoration technology. It includes: a partition wall with a structural floor slab at its bottom, and a supporting layer on the structural floor slab; a keel frame, installed on the partition wall via mounting components; and metal dry-hanging components, fixed to the keel frame with screws. The slab composite panel is fixed to the metal dry-hanging components with screws. This utility model connects the slab to an aluminum honeycomb panel and then to the keel frame via metal dry-hanging components. This structure allows the aluminum honeycomb panel to absorb and disperse the expansion stress of the slab during thermal expansion and contraction, providing a "buffer zone" and preventing cracking or deformation due to direct rigid constraint. Similarly, in cold seasons, when the slab contracts, the aluminum honeycomb panel adjusts accordingly to maintain the overall stability of the structure, further enhancing its adaptability to thermal expansion and contraction.