CAJ | 학술논문

针对目前国内海水直流冷却系统热能损失严重，存在海水冷却温排水和氯制杀生剂等环境影响问题，以某一采用海水冷却系统的合成氨生产装置为例，用夹点设计法对氨循环过程的换热网络进行用能诊断和优化.采用简洁、方便的电子表格建模法求解换热网络夹点，假定最小夹点温差为12℃，计算得出夹点位于子网络SN9与SN10之间，夹点在平均温度116℃处，换热网络所需的最小加热公用工程为19.91 MW、最小冷却公用工程为22.66 MW，与大型模拟软件的计算结果相近，验证了方法的可行性，并以此为依据，对该系统过程用能及工艺提出优化建议.
침대목전국내해수직류냉각계통열능손실엄중，존재해수냉각온배수화록제살생제등배경영향문제，이모일채용해수냉각계통적합성안생산장치위례，용협점설계법대안순배과정적환열망락진행용능진단화우화.채용간길、방편적전자표격건모법구해환열망락협점，가정최소협점온차위12℃，계산득출협점위우자망락SN9여SN10지간，협점재평균온도116℃처，환열망락소수적최소가열공용공정위19.91 MW、최소냉각공용공정위22.66 MW，여대형모의연건적계산결과상근，험증료방법적가행성，병이차위의거，대해계통과정용능급공예제출우화건의.
Presently in China, several common problems exist in once-through seawater cooling system, such as the great losses of heat energy, and the problems of environmental pollution from the discharge of heated water and the chlorination biocide, etc. Taking a case study of seawater cooling for an ammonia production process as an example, the research used the pinch point design method to diagnose and optimize the energy utilization. Then the research used the simple and convenient spreadsheet modeling method to resolve pinch point in heat exchanger network. A minimum temperature difference is chosen to be 12℃, the location of the pinch point is between SN9 and SN10, the average pinch temperature of the heat exchanger network is 116 ℃, the minimal requirement of the hot utility and the minimal requirement of the cold utility are 19.91 MW and 22.66 MW, the calculation results are close to the results from the large-scale simulation software, therefore, the feasibility of the method is verified. Meanwhile, the research aims to provide the basis for further optimization of the cooling system.