7 results about "Evaporation condensation" patented technology

The utility model discloses a vertical type evaporation condensation structure, relates to cooling unit technical field, wherein the vertical type evaporation condensation structure comprises a shell, a condenser assembly and a wet film, the shell is provided with an air duct, the condenser assembly is arranged in the shell, the wet film is arranged in the shell and extends along the direction of the condenser assembly, and the wet film is arranged on one side of the condenser assembly; wherein the air duct is respectively communicated with the condenser assembly and the wet film. According to the technical scheme provided by the utility model, the problems that the existing vertical evaporative cooling unit only dissipates heat in an air cooling or water cooling manner and is poor in refrigeration are solved.

The invention discloses an evaporation, cooling and condensation skid-mounted isenthalpy energy-saving device which comprises a raw material liquid feeding system, a preheating system, a separation tower system, a first-stage isenthalpy evaporation and condensation integrated system, a second-stage isenthalpy condensation and preheating integrated system and a recovery system. The separation tower system comprises a circulating pump, a separation tower and a tower bottom liquid discharge valve; the first-stage isenthalpy evaporation and condensation integrated system comprises an asymmetric runner plate type reboiler, a condenser I and a throttling device I; the second-stage isenthalpy condensation and preheating integrated system comprises a finished product tank, a condenser II, a compressor II, a condensation type preheater and a throttling device II; the raw material liquid feeding system comprises a raw material tank, a raw material pump and a steam auxiliary preheater. The evaporation and condensation skid-mounted isenthalpy energy-saving device provided by the invention has the effects of internal circulation and energy loss reduction.

The present application relates to the technical field of heat exchanger, and more particularly to a liquid discharge variable flow speed evaporation condensation type heat exchanger, which comprises a heat exchanger body, fixed frames arranged on both sides of the heat exchanger body, and a heat exchange pipe group arranged in the fixed frames; the heat exchange pipe group comprises a distribution cavity and a liquid collecting cavity arranged at the end of the fixed frame, an inlet pipe arranged in the distribution cavity, a conversion cavity arranged at the side of the distribution cavity, and a liquid discharge port arranged between the conversion cavity and the liquid collecting cavity. The liquid discharge variable flow speed evaporation condensation type heat exchanger can separate gas and liquid when the refrigerant in a gas-liquid mixed state passes through the pipe group and enters the distribution cavity, the liquid enters the liquid collecting cavity from the liquid discharge port, the dryness of the refrigerant in the subsequent pipe group is improved, the heat transfer coefficient is improved, the area is reduced, and the size of the unit is reduced while the performance remains unchanged.

The invention discloses a two-phase flow pressure drop prediction method and system of a proton exchange membrane fuel cell, and relates to the technical field of two-phase flow fuel cells, and the method comprises the following steps: constructing a geometric model of a proton exchange membrane fuel cell flow channel, and carrying out mesh generation on the geometric model to obtain a mesh model; boundary conditions of the grid model are set, a differential equation set used for representing the flow process of the gas phase flow and the liquid phase flow is constructed for each grid, and the differential equation set comprises a momentum equation used for calculating the flow channel pressure and a volume fraction equation used for describing the gas phase flow and the liquid phase flow; solving the differential equation set, obtaining the pressure at the inlet and the outlet of the grid model based on the solving result, and obtaining the two-phase flow pressure drop by subtracting the two pressures. By introducing the dynamic contact angle and modeling the evaporation condensation effect, the physical authenticity of liquid drop flow simulation and the pressure drop prediction precision can be remarkably improved.

The present application relates to the field of evaporation condensation, and discloses an energy-saving antifreezing and anti-fouling evaporation condensation device, which comprises a box body, a condensation coil, a water tank and a spraying pipe fixedly connected to the inside of the box body, and air inlet windows and air outlet windows are respectively arranged on the two sides and the top of the box body; a heat preservation assembly for slowing down heat loss is arranged in the inside of the box body, the heat preservation assembly comprises air inlet closing units and air outlet closing units arranged in the inside of the air inlet windows and the air outlet windows, and further comprises a water storage unit arranged in the inside of the box body and used for controlling the opening and closing of the air inlet closing units; the box body is closed after the spraying system stops working, the entry of external low-temperature air and the discharge of internal high-temperature steam are isolated, the temperature drop speed in the inside of the box body is reduced, freezing is not prone to occurring in the inside of the condenser in a short-term shutdown state under a low-temperature environment, the subsequent work of the condenser is not affected, and the stability of the condenser in operation under a low-temperature environment is ensured.

The application discloses a kind of liquid metal mixed working medium's pulsating heat pipe calculation method, comprising: obtaining size parameter construction model, determine working medium kind and property parameter;Preset initial parameter, according to liquid metal filling position construction liquid bullet momentum equation calculates liquid bullet displacement;Based on initial parameter iterative solution equation group formed by vapor bullet energy equation, mass flow and pressure relationship and temperature and pressure function relationship, obtain vapor bullet pressure and temperature;According to vapor bullet temperature and liquid bullet displacement determine liquid film thickness, flow velocity and length, calculate evaporation condensation heat transfer and update liquid bullet length;According to working medium kind, respectively establish conventional working medium and liquid metal liquid bullet energy equation, solve temperature distribution and obtain convective heat transfer coefficient, calculate incoming and outgoing sensible heat quantity;According to evaporation condensation heat transfer and sensible heat quantity calculate latent heat, sensible heat and total heat transfer and output.The application can simulate flow heat transfer characteristics, reveal heat transfer mechanism, provide guidance for pulsating heat pipe design optimization.

The invention relates to a condensation system water pan, an evaporation condensation system and an evaporation condensation system descaling method, and the evaporation condensation system water pan comprises a water collection frame which is provided with a water collection inclined plate and a water collection separation groove adjacent to the water collection inclined plate; the water collecting and separating plate is arranged in the water collecting and separating tank and is provided with filtering through holes for filtering spray water; the water receiving assembly is arranged below the water collecting frame and is used for receiving the spray water filtered by the water collecting and separating plate; wherein the water collecting inclined plate is higher than the water collecting and separating plate, and the water collecting inclined plate is obliquely arranged towards the water collecting and separating plate, so that spray water of a condensation system can be guided to the water collecting and separating plate through the water collecting inclined plate to be filtered; the problems that dust (coal dust, rock dust and the like) in air easily enters water circulation of an evaporation and condensation system through a water pan of an existing condensation system, water pollution is caused, and the scaling risk of the evaporation and condensation system is increased can be solved.