CIESC Journal ›› 2019, Vol. 70 ›› Issue (S1): 186-192.doi: 10.11949/j.issn.0438-1157.20181217

• Energy and environmental engineering • Previous Articles     Next Articles

Design and experimental study on silica gel-water adsorption air cooler

Hongbin WANG1(),Jiajie PENG2,Haiquan SUN1,Quanwen PAN2(),Ruzhu WANG2,Hailiang WANG1,Zhaohong XU1   

  1. 1. Shandong Normal University Lishan College, Weifang 262500, Shandong, China
    2. Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China
  • Received:2018-10-17 Revised:2019-01-23 Online:2019-03-31 Published:2019-04-26
  • Contact: Quanwen PAN E-mail:408201618@qq.com;sailote@sjtu.edu.cn

Abstract:

The adsorption air cooler does not require the cooling water circuit and the cooling water pump, so it can meet the needs of miniaturized applications. In this paper, a silica gel-water adsorption air cooler was experimentally studied, which consists of two adsorbers, one condenser and one heat pipe type evaporator. The dynamic operating characteristics of the cooler were obtained. This paper discusses the influence of heat source temperature, cooling water inlet temperature and cold air outlet temperature on system performance. The experimental results show that the cooler can be effectively driven by low-grade heat source at 60—90℃. The cooling capacity of 0.84—2.29 kW and the corresponding COPs of 0.26—0.43 were achieved.

Key words: adsorption, silica gel-water, air cooler, design, desorption

CLC Number: 

  • TB 651

Fig.1

Schematic diagram of silica gel-water adsorption air cooler"

Table 1

Dimension parameters of adsorption bed"

参数数值
翅片长度/mm254
翅片宽度/mm56
翅片厚度/mm0.15
翅片间距/mm3
翅片段管长/mm300
换热管外径/mmΦ9.54
换热管厚度/mm0.4

换热管间距/mm

水平

垂直

25(中心距)

22(中心距)

硅胶颗粒直径/mm0.5~1.5
硅胶质量/kg2.8

Table 2

Design parameters of condenser"

参数数值
换热管外径/mmΦ16
换热管长度/mm1054
流程数10
换热管厚度/mm0.7
换热管数量20

Table 3

Design parameters of evaporator"

参数数值
换热管外径/mmΦ16
换热管长度/mm800
微槽深度/mm28
流程数4
换热管厚度/mm0.7
微槽宽度/mm300
换热管数量44

Table 4

Operational control of silica gel-water adsorption air cooler"

工作过程V1V2V3V4V5V6V7V8
制冷过程100000000
预热预冷过程111111001
制冷过程211111111
预热预冷过程200001001

Fig.2

Schematic diagram of test system"

Table 5

Measuring equipment and parameters"

名称规格精度
温度传感器A级Pt1000.15℃
电磁流量计ZK-LDE-25-PO-40.5%
电磁流量计ICF300F-15%~10%

温湿度记录仪

TH22R-EX

温度精度±0.1℃, 湿度精度

±1.5%RH

热线式风速仪AR866±3%±0.1dgt

Fig.3

Inlet/outlet temperature profiles of heat transfer fluid"

Fig.4

System performance vs temperature of hot water inlet"

Fig.5

System performance vs temperature of cooling water inlet"

Fig.6

System performance vs temperature of chilled air outlet"

Table 6

Relative errors of experimental results"

参数制冷量COP
相对误差范围5.29%~6.89%8.99%~13.09%
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