吉林大学学报(工学版) ›› 2023, Vol. 53 ›› Issue (4): 1133-1138.doi: 10.13229/j.cnki.jdxbgxb.20210206

• 交通运输工程·土木工程 • 上一篇    

回热对低温大质流密度实验系统能耗影响

徐振军1(),张瑞凤1,2,陈嘉祥2,张晓慧3,密晓光3,陈杰3,陈林2,4()   

  1. 1.青岛农业大学 建筑工程学院，山东 青岛 266109
    2.中国科学院 工程热物理研究所，北京 100190
    3.中海石油气电集团 研发中心，北京 100028
    4.中国科学院大学 航空宇航学院，北京 100049
  • 收稿日期:2021-03-16 出版日期:2023-04-01 发布日期:2023-04-20
  • 通讯作者: 陈林 E-mail:xuzhenjun@qau.edu.cn;chenlin2018@iet.cn
  • 作者简介:徐振军（1980-），男，副教授，博士.研究方向：低温制冷和建筑节能.E-mail： xuzhenjun@qau.edu.cn
  • 基金资助:
    国家自然科学基金项目(52106033);中海石油气电集团有限责任公司研究项目(GP-YF-CB-2020-015);中国科学院前沿科学重点研究计划项目(ZDBS-LY-JSC018);中国科学院人才启动经费项目

Influence for backheating on low temperature high mass experimental system

Zhen-jun XU1(),Rui-feng ZHANG1,2,Jia-xiang CHEN2,Xiao-hui ZHANG3,Xiao-guang MI3,Jie CHEN3,Lin CHEN2,4()   

  1. 1.College of Civil Engineering & Architecture，Qingdao Agricultural University，Qingdao 266109，China
    2.Institute of Engineering Thermophysics，Chinese Academy of Sciences，Beijing 100190，China
    3.R&D Center，CNOOC Gas & Power Group，Beijing 100028，China
    4.School of Aeronautics and Astronautics，University of Chinese Academy of Sciences，Beijing 100049，China
  • Received:2021-03-16 Online:2023-04-01 Published:2023-04-20
  • Contact: Lin CHEN E-mail:xuzhenjun@qau.edu.cn;chenlin2018@iet.cn

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摘要：

以绕管式换热器为测试件，设计搭建了带回热的大质流密度流动传热特性实验系统。该实验系统包括主测试循环回路、冷却回路、控制系统和安全通风系统。本文实验系统能够覆盖的实验工况范围如下：蒸发压力为0.15~0.85 MPa，质流密度为20~120 kg/（m2·s），干度为0~1.0，热流密度为0~10 kW/m2，温度可达-180 ℃。构建了实验系统热力学模型，获得了实验工况条件下各节点温度、压力数据和设备负荷参数。对该系统能耗进行了对比分析，研究发现，有回热系统在各个干度情况下均比无回热系统的能耗低，干度为0.1时，能耗减少75%，在干度为0.5时，能耗减少43%，在干度为1时，能耗减少3%。

关键词: 动力工程, 工程热物理, 低温大质流密度, 回热, 能耗

Abstract:

In this paper， the experimental system for high mass flow density flow and heat transfer characteristics with heat back was designed and built with the wound tube heat exchanger as the test piece. The experimental system includes main test cycle circuit， cooling circuit， control system and safety ventilation system. The experimental conditions of the experimental system can cover 0.15~0.85 MPa evaporation pressure， 20~120 kg/（m2·s）mass flow density， 0~1.0 dryness and 0~10 kW/m2 heat flow density. The thermodynamic model of the experimental system is constructed， and the temperature， pressure data and equipment load parameters of each node under the experimental conditions are obtained. The energy consumption of the system is analyzed and compared with the existing data. It is found that the energy consumption of the regenerative system with back heat is lower than that of the non regenerative system in each dryness. When the dryness is 0.1， the energy consumption is reduced by 75%， when the dryness is 0.5， the energy consumption is reduced by 43%， and when the dryness is 1， the energy consumption is reduced by 3%.

Key words: power engineering, engineering thermophysics, low temperature high mass flow density, back heat, energy consumption

中图分类号: 

  • TB61

图1

低温大质流密度实验系统原理流程图"

图2

板翅式回热器"

表1

各节点状态计算结果"

节点编号预冷段液化段深冷段
温度/°C压力/MPa温度/°C压力/MPa温度/°C压力/MPa
130.000.1930.000.2230.000.24
240.001.5040.001.5040.001.50
320.561.45-14.541.45-85.021.45
410.001.42////
510.001.42-14.541.45//
6-25.001.93-25.001.42//
7-25.001.93-25.001.42-85.021.45
8-54.321.29-137.911.32-172.451.35
9-53.950.26-137.380.29-172.000.31
10-32.420.25-51.560.28-172.000.31
11-30.520.24-49.770.27-109.140.29
1230.000.1930.000.2230.000.24

表2

各设备负荷计算结果 (kW)"

设备名称预冷段液化段深冷段
隔膜压缩机59.4177.68101.98
气化回热器28.0639.7182.40
一级冷却换热器59.88--
二级冷却换热器47.2625.66-
三级冷却换热器19.40149.39143.66
干度调节电热器129.69174.67140.76

图3

预冷段有无回热能耗对比"

图4

预冷段液氮流量对比"

图5

不同干度下回热器热侧出口工质温度"

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