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Novel device for taking water from air and application thereof

A new type of air water intake technology, applied in water supply devices, drinking water devices, general water supply and saving, etc., can solve the problems of limiting the overall water absorption, limited diffusion, waste of water-absorbing agents, etc., to simplify the process and workload, and enhance the material The effect of exchanging and increasing water absorption

Active Publication Date: 2021-03-19
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of the site, the existing adsorption water intake unit must be equipped with a certain thickness of water absorbing agent
Taking 50% calcium chloride solution as an example, when the thickness of the solution exceeds 8mm, the water absorption does not increase significantly. The diffusion effect brought about is limited, and the water-absorbing agent in the body phase below 8mm cannot be diffused to the water-absorbing surface for water absorption, resulting in the waste of this part of the water-absorbing agent, limiting the overall water absorption at night, and further leading to evaporation during the day. lack of water

Method used

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  • Novel device for taking water from air and application thereof
  • Novel device for taking water from air and application thereof
  • Novel device for taking water from air and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Such as figure 2 Shown is the concrete device of the present embodiment, and it comprises a glass watch glass 6 of inner height 2cm, fills calcium chloride solution 7 in the glass watch glass, and this calcium chloride solution 7 is made by following method: Add 50 grams of calcium chloride solid into 50 ml of deionized water, stir for 1 hour until clear and transparent. After filling, cover the opening of the glass watch glass 6 with a polytetrafluoroethylene / carbon black film 8, the thickness of the polytetrafluoroethylene / carbon black film 8 is 100 microns, and the fiber diameter is 500 nanometers. The content of carbon is 2% by mass fraction. This layer of film is prepared in the following way:

[0045] Dissolve 2 g of polytetrafluoroethylene solid powder and 0.4 g of carbon black in 17.6 g of dimethylformamide to prepare a blended solution of polytetrafluoroethylene and carbon black. The PTFE / carbon black films were then prepared using an electrospinning machin...

Embodiment 2

[0056] The difference between this embodiment and Embodiment 1 is that the radiation cooling layer is polydimethylsiloxane (PDMS). The preparation method is still the electrospinning method.

[0057] Figure 7 The infrared emission spectrum of PDMS is shown in , and it can be observed that at 8-13 microns, the infrared emission rate of PDMS is significantly lower than that of polyethylene oxide (PEO), so its radiative cooling effect is also lower than that of polyethylene oxide (PEO).

[0058] Use thermocouple to record the solution temperature near the radiative cooling layer PDMS of embodiment 2 groups, the temperature near the solution temperature of the air-permeable layer and the environment at night, such as Figure 11 Shown is the nighttime temperature record data graph of the device of this embodiment. After calculation, the average temperature of the PDMS solution near the radiative cooling layer at night is about 3 degrees Celsius lower than the ambient temperature....

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Abstract

The invention relates to the technical field of taking water from air, in particular to a novel device for taking water from air and application thereof. The device comprises a radiation refrigerationlayer, a heat-conducting medium layer, a liquid water absorbent layer and a breathable layer which are arranged in sequence, and the breathable layer allows a gas to pass through and prevents liquidfrom passing through. According to the device, input of external energy is not needed, matter exchange between an interface and the interior of a body phase is enhanced, a large-thickness water absorbent can be laid on a water absorbing device, and therefore the water absorbing capacity of the water absorbing device is improved.

Description

technical field [0001] The invention relates to the technical field of air water intake, in particular to a novel air water intake device and its application. Background technique [0002] With the growth of the global population and the acceleration of the industrialization process of countries around the world, the shortage of fresh water resources in the world has become more and more serious. In particular, some islands and reefs and inland arid areas are short of fresh water resources, and the scattered residences of residents cannot provide centralized water supply. Solar powered based adsorption air water abstraction effectively provides a solution for distributed water supply. The technology captures water vapor in the air with a moisture absorbent at night, and then desorbs and regenerates the moisture absorbent driven by solar energy, releasing water vapor from the moisture absorbent and collecting liquid water through condensation. Compared with the electric-dri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E03B3/28C02F1/14
CPCE03B3/28C02F1/14Y02A20/212
Inventor 朱嘉李博傅涵堉
Owner NANJING UNIV