渤海湾海上电力动力平台暖通空调系统设计研究

海上电力动力平台上设置有大量高压电气设备间等房间,合理的暖通空调系统设计对于设备的安全稳定运行起到重要作用。以渤海湾某岸电工程海上电力动力平台暖通系统设计为例,阐述了系统设计标准、设计原则和设计方案。实践结果表明,设计原则和设计方案合理可行,可为后续海上电力动力平台暖通空调系统设计提供参考。

海上平台余热制冷技术应用研究

以往海上平台标准化生活楼采用电动机驱动压缩式制冷机组作为生活楼空调系统的冷源,其耗电量和振动噪声较大。本文介绍了溴化锂吸收式制冷机组在南海某油田新建平台的应用。结果表明,在具有应用条件的海上平台使用溴化锂吸收式制冷机组为生活楼供冷技术可行,且大幅降低了生活楼空调系统耗电量和设备振动噪声,具有良好的节能和经济效益。

Investigation into the stress-strain curves of deformation-induced ferrite transformation in a low carbon steel

A series of tests of deformation-induced ferrite transformation （DIP-T） in a low carbon steel were carried out by the Gleeble-3500 hot simulation machine at a temperature range of Ae3-Ar3. The overall stress-strain curves during DIFT can be divided into three typical types： ＂double-humped＂,＂ single-humped＂ and ＂transitional＂. The peaks exhibited in the curve are involved with deformation-induced transformation which happened in grains or at the grain boundaries. According to the stress-time curve and strain-time curve, strain capacity dramatically postponed the strain-induced transformation, which leads to the start of the transformation right ahead of the finish of deformation and the majority of the ferrite transformation process mainly happened after the deformation. Deformation-induced transformation is a metadynamic transformation process with dynamic nucleation.

我国黄羽肉鸡高质量生产对策

一黄羽肉鸡养殖与品种选育痛点分析1养殖产区不断分化我国是肉鸡生产和消费大国,但不是生产强国。我国肉鸡种类多,鸡肉主要来自于白羽肉鸡、黄羽肉鸡、淘汰蛋鸡和肉杂鸡等。目前肉鸡养殖产区分化,传统主产区养殖总量不断减少,规模化养殖有所提高,非传统生产区总量和规模大幅提高,区域化、本地化养殖效率和效益有所提高,原来明显的产销区界限不断弱化。