【Daily Question No. 326】November 28, 2018
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【Daily Question No. 326】November 28, 2018: Why should the suction temperature of a reciprocating compressor not be too high? Based on the principle of thermal expansion and cooling, in order to improve the efficiency of the compressor, the temperature of the inlet gas should not be too high ； If the temperature of the inhaled gas is too high (above normal levels), and this is combined with mixing with the hot gas already present in the cylinder, as well as continuous heating of the gas by the valve and cylinder walls, the gas temperature rises further, causing the gas volume to increase and the gas molecules to become more sparse. In this way, although the production capacity calculated on a volume basis remains unchanged, the production capacity calculated on a weight basis decreases. After cooling and compression, the volume of the compressed gas is reduced, resulting in a lower exhaust volume and a decreased efficiency of the compressor. This also has an impact on the operation of the compressor as well as on its maintenance. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Correct: 3 wealth, Incorrect: 1 wealth ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space through the summary post below
Excessively high compression ratio, too high intake temperature, poor cylinder cooling, clogged intake filter, damaged valves, or air leakage from the valve seat gaskets, etc.
If the intake temperature is too high, the exhaust temperature after compression will be very high, which can damage the compressor’s seals.
No, reply and check the answer to learn a bit
Based on the principle of thermal expansion and contraction, in order to improve the efficiency of the compressor, the suction temperature should not be too high. If the gas inlet temperature is too high, and this combined with mixing with the hot gas remaining in the cylinder, as well as the continuous heating of the gas by the valves and within the cylinder, further raises the gas temperature. This causes the gas volume to increase and the gas molecules to become more dispersed. As a result, although the production capacity in terms of volume remains unchanged, the production capacity in terms of weight decreases. After compression and cooling, the pressure of the compressed air drops, the volume of exhaust gas decreases, and the efficiency of the compression process is reduced. This also has an impact on the operation of the machine and its maintenance
Excessively high intake gas temperature will reduce the exhaust volume
According to the principle of thermal expansion and contraction, in order to improve the efficiency of the compressor, the temperature of the gas being drawn in should not be too high. If the temperature of the gas entering the compressor is too high (above normal levels), and it mixes with the hot gas already present in the cylinder, coupled with the continuous heating of the gas by the valve elements and the cylinder walls, the temperature of the gas rises further. This causes the volume of the gas to increase, resulting in a lower density of gas molecules. As a result, although the production capacity calculated based on volume remains unchanged, the production capacity calculated based on weight decreases. After compression and cooling, the pressure of the compressed gas drops, the amount of gas discharged decreases, and the efficiency of the compressor declines. This also has an impact on the operation of the machine and its maintenance.
According to the principle of thermal expansion and contraction, in order to improve the efficiency of the compressor, the temperature of the gas being drawn in should not be too high. If the temperature of the gas entering the compressor is too high (above normal levels), and it mixes with the hot gas already present in the cylinder, coupled with the continuous heating of the gas by the valve elements and cylinder walls, the temperature of the gas rises further. This causes the volume of the gas to increase, resulting in a lower density of gas molecules. As a result, although the production capacity calculated on a volumetric basis remains unchanged, the production capacity calculated on a weight basis decreases. After compression and cooling, the pressure of the compressed gas drops, the amount of exhaust gas decreases, and the efficiency of the compressor declines; this also has an impact on the operation of the machine and its maintenance.
High intake temperature reduces the effective components of the gas, lowers the exhaust volume, and results in a decrease in output.
A high intake temperature can lead to an excessively high exhaust temperature, resulting in damage to the valves