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Cast aluminum silicon magnesium gas water heater with pneumatic electric coupling ultimate condensation

A gas-fired water heater and cast aluminum technology, which is applied in the direction of air heaters, fluid heaters, lighting and heating equipment, etc., can solve the problems of reduced thermal efficiency, less heat recovery from flue gas latent heat, and worsened heat transfer. Effects of corrosion, heat and mass transfer enhancement, and heat and mass transfer enhancement

Pending Publication Date: 2018-11-30
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned problem that the thermal efficiency of the commercial gas-fired heating water heater decreases with the increase of the load, and the latent heat recovery of the flue gas with high parameter outlet water and return water temperature is less heat, and strengthen the heat transfer and mass transfer capabilities of the heat exchanger, make full use of the The combustion heat of natural gas is used for heating, and at the same time, it solves the deterioration of heat transfer caused by the subcooling and boiling caused by the descending channel of commercial gas heating water heaters

Method used

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  • Cast aluminum silicon magnesium gas water heater with pneumatic electric coupling ultimate condensation
  • Cast aluminum silicon magnesium gas water heater with pneumatic electric coupling ultimate condensation
  • Cast aluminum silicon magnesium gas water heater with pneumatic electric coupling ultimate condensation

Examples

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Effect test

Embodiment example 1

[0036] Such as Figure 2a , Figure 2b , Figure 2c , the modular heat exchange furnace 1 includes an inlet and outlet fluid interface 11, a fixed ear 12 and a molding sand hole 13 located on the side of the modular heat exchange furnace 1, and the tail of the radiation heating area of ​​the modular heat exchange furnace 1 has a guide Flow ribs 14, combined pin fins 15 are regularly arranged on the convection heat exchange surface of the modular heat exchange furnace 1, and a soot cleaning port 16 is opened on one side of the modular heat exchange furnace 1, and the inside of the modular heat exchange furnace 1 It includes an upper waterway 171 and a lower waterway 172 .

[0037] The thickness of the heat exchange area of ​​the modularized heat exchange furnace sheet 1 is 5-7mm. In order to save material and ensure the structural strength, the designed wall thickness of the non-heat exchange area is 8-30mm.

[0038] Such as Figure 2b As shown, the inlet and outlet fluid i...

Embodiment example 2

[0046] In this embodiment, the same symbols are assigned to the same structures as those in Embodiment 1, and the same descriptions are omitted.

[0047] The wall thickness of the modular heat exchange furnace sheet 1 is relatively thin, and the groove is difficult to cast, such as Figure 2e As shown, the diamond-shaped boss design can be adopted, and the height of the diamond-shaped boss is 5-10 mm. By increasing the diamond-shaped convective heat exchange surface, the wall surface of the modular heat exchange furnace 1 is relatively formed to form a "groove" to guide the condensate.

Embodiment example 3

[0049] In this embodiment, the same symbols are assigned to the same structures as those in Embodiment 1, and the same descriptions are omitted.

[0050] The convective heat transfer concentrated area of ​​the modularized heat transfer furnace 1 is staggered with circular pin-fins such as Figure 4 The reinforcement rib connection with a thickness of 2-4mm and a height of 5-15mm can effectively strengthen the strength of the pin-fin structure and reduce the difficulty of drafting while increasing the convective heat transfer area and playing the role of flue gas diversion.

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Abstract

The invention discloses a cast aluminum silicon magnesium gas water heater with pneumatic electric coupling ultimate condensation. The gas water heater comprises a plurality of modular heat exchange furnace sheets. The multiple modular heat exchange furnace sheets, a plate heat exchanger and a heat pump are connected into a heating circuit through pipelines. Communication of the pipelines is controlled through a valve set. Pin fins in the modular heat exchange furnace sheets are arranged up and down in a staggered mode and are fins with various cross-section shapes in a combined mode; througha radiation zone split water flow channel structure, the phenomenon of heat transfer deterioration caused by supercooled boiling is avoided; through the three-dimensional structured pin fins, grooves,inclined ribs and condensation heat exchange zone blunt body protrusion structure design, condensation heat exchange zone pin fins and wall surface liquid films are effective torn, and the heat and mass transfer performance is improved; tetrahedral protrusions of the condensation heat exchange zone effectively tear the wall surface liquid films, and the heat transfer area is enlarged; through surface corrugation treatment of a convection heat exchange zone, the heat exchange area is increased, and the heat exchange coefficient is increased; and an overall heating system adopts a pneumatic electric coupling form, latent heat of ultimate condensation flue gas is fully recovered under the high-parameter water outlet and return and high load conditions, and the effect that the system has thehighest thermal efficiency at all times is ensured.

Description

technical field [0001] The invention belongs to the field of energy-saving and environment-friendly heat exchange heat exchangers with improved energy utilization efficiency, and in particular relates to a cast aluminum-silicon-magnesium gas-fired hot water heater with gas-electric coupling limit condensation. Background technique [0002] In recent years, the smog problem has continued and occurred frequently, and the smog phenomenon is even more serious during the heating season in the north. In order to control smog and protect the blue sky, the heating industry has put forward the "Winter Clean Heating Plan in Northern Regions 2017-2021", in which the clean heating rate in 2019 will be 50% instead of 74 million tons of scattered coal, and the new gas will be 13.1 billion m 3 ; In 2021, the clean heating rate will be 70% instead of 150 million tons of scattered coal, and the new gas will be 27.8 billion m 3 ; In 2021, the demand for heating natural gas will reach 64.1 bi...

Claims

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Application Information

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IPC IPC(8): F24H4/02F24H8/00
CPCF24H4/02F24H8/00Y02B30/00
Inventor 赵钦新桂雍焦健邓世丰王云刚梁志远
Owner XI AN JIAOTONG UNIV
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