摘要
为合理、经济地利用能源,降低生产成本,综合考虑了温度、表面传热系数和材质等影响流股传热能力的因素,计算出温差贡献值来修正各流股的实际温度得到虚拟温度,基于虚拟温度作出温焓图,提出多流股换热器网络的综合策略和冷、热流股的匹配规则,得到一组串联的多流股换热器,直观有效地进行换热网络的设计和优化。最后通过两个例题说明所提方法是可行的。
In order to save energy furthest, this paper synthesizes heat exchanger network based on each stream effective temperature level named ＂stream pseudo-temperature＂ which is obtained by each stream heat transfer temperature difference contribution value instead of a single global minimum approach temperature. This approach enables the designer to get a better reasonable network because of considering the properties of each stream, such as heat transfer film coefficients, the materials of construction, flow rate, temperature, thermodynamic and physical natures. An automated method for synthesizing multi-stream heat exchanger network by temperatureenthalpy graph is presented. The performance of the proposed approach has been demonstrated with some examples and the obtained solutions are compared with those available in literatures.
出处
《计算机与应用化学》
CAS
CSCD
北大核心
2007年第2期235-238,共4页
Computers and Applied Chemistry
关键词
虚拟温度
温差贡献值
温焓图
多流股换热器网络综合
pseudo-temperature, temperature enthalpy graph, stream heat transfer temperature difference contribution value, multistream heat exchanger network
