Natural gas or hydrogen filling system and filling method

Abstract

The invention relates to a natural gas or hydrogen filling system and filling method. The natural gas or hydrogen filling system comprises a multi-stage gas pressure gas filling tank, a mixed gas filling pipeline, a pre-cooler, a gas filling machine and a movable expansion joint, wherein the multi-stage gas pressure gas filling tank comprises a plurality of gas storage tanks; each gas storage tankis provided with an output pipeline and a control valve; the output pipelines of the multi-stage gas pressure gas filling tank are gathered in the mixed gas filling pipeline; the mixed gas filling pipeline is connected with the pre-cooler, the gas filling machine and the movable expansion joint in sequence; the pre-cooler is a heat exchanger arranged on the mixed gas filling pipeline; the pre-cooler is connected with the gas filling machine; the mixed gas filling pipeline is connected with the gas filling machine through the pre-cooler; a final connector of the gas filling machine is connected to the movable expansion joint; the movable expansion joint is used for being matched with a cylinder valve on a gas storage cylinder on a passenger car; and the internal diameter of the movable expansion joint is 8-40 mm. An 'offset+inhibition' temperature control mechanism is adopted, the throat limitation is eliminated, and the filling temperature is effectively controlled.

Description

technical field [0001] The invention belongs to the technical field of energy gas filling control, and relates to a filling system and a filling method capable of suppressing heat generation and temperature rise during natural gas or hydrogen filling. The control system for suppressing temperature rise through the filling process of the present invention has a comprehensive temperature control effect of "suppressing temperature rise + counteracting temperature rise", and can effectively reduce the technical indicators of existing CNG filling stations ≥ 55°C (20Mpa), hydrogen filling Station technical indicators ≥ 85 ℃ (70Mpa) and other vehicle fuel filling transfer process temperature rise, to prevent gas filling thermal runaway caused safety hazards, can better develop energy gas filling density, capacity, improve the performance of the car Cruising range, energy efficiency, economical use, etc., to achieve the effect of energy saving and emission reduction. Background tech...

AI Technical Summary

Problems solved by technology

In the prior art, there are a small number of literature reports on pre-cooling natural gas to make the temperature of natural gas lower during the filling process, but it cannot completely and effectively solve all the hindering factors that cause temperature rise during the filling process of natural gas

Therefore, the actual natural gas temperature control during the natural gas filling process is not ideal, and the optimal natural gas filling control purpose has not been achieved.

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