Chemical adsorption type heat refrigeration system employing alkaline-earth metal halide

Abstract

The invention discloses a chemical adsorption type heat refrigeration system employing an alkaline-earth metal halide. The chemical adsorption type heat refrigeration system comprises N adsorption bed components, wherein each adsorption bed component comprises an adsorption bed unit tube component, an ammonia gas adsorption pipeline and an ammonia gas desorption pipeline, a heat source inlet pipeline, a cooling water inlet pipeline and a cooling water return pipeline; each adsorption bed unit tube component comprises M adsorption unit tubes, each adsorption unit tube comprises an adsorption outer tube, a plurality of trays arranged in the adsorption outer tube and a filter screen arranged between two adjacent rows of trays, an adsorbent is arranged in each tray, and the top ends of the adsorption outer tubes are connected to a gas manifold; a condenser, a liquid ammonia tank, a throttle valve and an evaporator are connected between each ammonia gas adsorption pipeline and each ammonia gas desorption pipeline in sequence. According to the chemical adsorption type heat refrigeration system, through cooperative application of chemical adsorption beds for adsorption and desorption, the uninterrupted heating or cooling is realized, and the refrigerating capacity and the refrigeration depth are improved under the same heat source condition.

Description

technical field [0001] The invention relates to a chemical adsorption thermal energy refrigeration system, in particular to an alkaline earth metal halide chemical adsorption thermal energy refrigeration system. Background technique [0002] Thermal refrigeration technology is divided into two categories: absorption refrigeration and adsorption refrigeration. Since the current absorption refrigeration products mainly use lithium bromide aqueous solution as the refrigerant, and the process is complicated, it can only be used in air-conditioning (above 7°C) refrigeration places, and cannot be miniaturized (power at least 40kw). The energy required is also of high quality, such as industrial saturated steam, natural gas or coal gas. Although there is a bromine gas lithium hot water unit, the hot water driving the unit requires a large head and flow for heat exchange, and its pump power is The power consumption is close to the same order of magnitude as the power consumption of...

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Problems solved by technology

However, there are still some problems in the current chemisorption refrigeration, which also lead to the commercial application of chemisorption refrigeration products: First, the current academic research on chemisorption refrigeration is mostly based on a single group of adsorption beds, forming a single To the chemical adsorption thermal energy refrigeration system, or the two-way switching intermittent chemical adsorption thermal energy refrigeration system, the full reaction time of chemical adsorption is infinitely long, this characteristic cannot be applied in the product, and some frontier researchers are engaged in double adsorption bed research, One group of adsorption beds is in a cooling state to absorb refrigerant, and at the same time, another group of adsorption beds is heated to desorb refrigerant. The two groups of adsorption beds and the core of the refrigeration system form a refrigeration cycle loop. Because the chemical adsorbent adsorbs the refrigerant The efficiency of desorption is not the same as that of desorption, resulting in an unbalanced working condition of the two groups of adsorption beds, which affects the cooling effect. In addition, during the switching process of the two groups of adsorption beds, heating or cooling is stopped for a period of time, and the two groups of adsorption beds simultaneously They are not in the state of adsorption and desorption. Since there is no adsorption, refrigeration cannot be performed. This process forms an interval of refrigeration neutrality, which can only achieve the poor effect of discontinuous refrigeration. The existing one-way, intermittent refrigeration working conditions no practical value

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