| 摘要: |
| 差压预冷送风参数直接影响差压预冷效果和预冷装置的能耗，本文搭建差压预冷实验台，选取西红柿为研究对象，测得不同送风速度、不同送风温度工况下西红柿中心温度随时间的变化特点，分析不同预冷条件下西红柿预冷时间规律,对不同工况下西红柿预冷效果和装置能耗进行分析。根据分析结果提出变送风速度和变送风温度的优化方案，发现西红柿由27 ℃降到15 ℃过程采用风速0.9 m/s，由15 ℃降到5 ℃采用风速0.57 m/s预冷，对比定送风速度预冷，差压风机可节能14.5% ~ 17.7%；西红柿由27 ℃降到10 ℃过程采取送风温度为4 ℃，由10 ℃降到5 ℃采取送风温度为2 ℃，对比定送风温度预冷，制冷系统可节能5.6% ~ 10.5%。 |
| 关键词: 差压预冷 节能 变送风参数 送风速度 送风温度 |
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| Research on Energy Saving of Tomato Pressure Pre-cooling by Changing the Supply Air Parameter |
| Shen Jiang,Ding Feng,Zhang Xianhong |
| (Tianjin Key Lab of Refrigeration Technology, Tianjin University of Commerce) |
| Abstract: |
| The supply air parameter of pressure pre-cooling directly influence the energy consumption of pre-cooling device. In this paper, an experimental platform for pressure pre-cooling is set up, and tomatoes are chosen as experimental objects. The relationship between the tomato center temperature and the time is obtained under the condition of different supply air parameter. By analyzing the principle of tomato pre-cooling time, the tomato pre-cooling results and energy consumption of the pre-cooling device, the optimization scheme of variable supply air speed and temperature is proposed. It is shown that the supply air speed remains 0.9 m/s while the tomato temperature drops from 27 ℃ to 15 ℃, and remains 0.57 m/s while the tomato temperature drops from 15 ℃ to 5 ℃, the energy consumption of the fan can be reduced by 14.5% ~ 17.7%; The supply air temperature remains 4 ℃ while the tomato temperature drops from 27 ℃ to 10 ℃, and remains 2 ℃ while the tomato temperature drops from 10 ℃ to 5 ℃, the energy consumption of the refrigeration system can be reduced by 5.6%~10.5%. |
| Key words: pressure pre-cooling energy saving variable supply air parameter air supply velocity air supply temperature |
