石油化工设计 ›› 2025, Vol. 42 ›› Issue (3): 12-14.

• 设计技术 • 上一篇    下一篇

一种石化装置变电所电缆夹层发热量计算方法

刘孟直   

  1. 中国石化工程建设有限公司,北京,100101
  • 收稿日期:2025-02-23 出版日期:2025-08-25 发布日期:2025-08-25
  • 作者简介:刘孟直,男,2019年毕业于大连科技学院电气工程及自动化专业,助理工程师,主要从事室外装置区供配电设计。联系电话:010-87845486.

Calculation Methods for Heat Generation in Cable Interlayers in Substations in Petrochemical Plants

Liu Mengzhi   

  1. Sinopec Engineering Incorporation, Beijing, 100101
  • Received:2025-02-23 Online:2025-08-25 Published:2025-08-25

摘要:

考虑到电缆集中敷设的管理、散热、防火安全等因素,石化装置变电所设计时首先设置电缆夹层。敷设在电缆夹层内的电缆通电过程中会产生热能,当电缆夹层内部温度过高时,将对电缆及相关设备的绝缘等方面造成损害。为得到较为准确的夹层电缆所产生的热损耗,避免在电缆夹层内增设过多的暖通设备导致费用的增加,设计过程中采用多种方法来计算电缆夹层热损耗,为变电所夹层内发热量计算提供依据。结合石油化工装置某项目变电所的实际案例,提出电缆夹层发热量计算公式,力求保障设备安全运行的同时实现节能环保。

关键词: 电缆夹层, 电缆发热量计算, 热损耗

Abstract:

Considering factors such as the management, heat dissipation and fire safety of centralized cable laying, cable interlayers are installed in the design of substations in petrochemical plants. Cables laid in cable interlayers generate heat when they are energized. Over high internal temperature of cable interlayers will cause damage to the insulation of the cables and related equipment. To obtain a more accurate calculation of the heat loss generated by the cables in cable interlayers and avoid the increase in cost caused by adding a large number of HVAC loads in cable interlayers, multiple methods are adopted in the design to calculate the heat loss of the cable interlayers, providing a basis for the calculation of heat generation in the cable interlayers of substations. This paper, taking a substation in a petrochemical plant project as an actual case, proposes a calculation formula for the heat generation in cable interlayers, aiming to ensure the safe operation of equipment while achieving energy conservation and environmental protection.

Key words: cable interlayer, calculation of heat generation of cables, heat loss