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椭圆管中间冷却器芯的改造是动力用空气压缩机节能改造项目之一。我厂根据85版统一定型图样生产的10m～3芯子型号为LNB130-1,配套机型L2-10/7,旧机型3L-10/8;20m～3芯子型号LNB130-2,配套机型L3.5-20/7,旧机型4L-20/8;40m～3芯子型号L5.5-40/7,旧机型L5.5-40/8。本产品通过与原圆管浸锡芯子同机对比测试,阻力△PL分别下降45～62.smmH2O,换热率B分别提高0.05～0.07kcal/m～3K,容积比能Wv（q）分别下降 0.04～0.05kw/（m～3·min～（-1））,取得了较好的经济效益,并在87年1月8日通过国内首家生产技术鉴定。
Oval pipe intercooler core transformation is the power of air compressors energy-saving projects. I plant according to the 85 version of a unified stereotypes produced 10m ~ 3 core model LNB130-1, supporting models L2-10 / 7, the old models 3L-10/8; 20m ~ 3 core model LNB130-2, supporting Model L3.5-20 / 7, the old model 4L-20/8; 40m ~ 3 core model L5.5-40 / 7, the old model L5.5-40 / 8. Compared with the original tube immersion tin core, this product is tested on the same machine, resistance △ PL decreased 45 ~ 62 smmH2O, heat exchange rate B increased 0.05 ~ 0.07kcal / m ~ 3K, volume specific energy Wv Down 0.04 ~ 0.05kw / (m ~ 3 · min ~ (-1)), and achieved good economic benefits. It passed the first domestic production technology appraisal on January 8,