业界新闻：西门子为俄罗斯油气商Rosneft提供燃气涡轮机

近日,西门子能源公司与俄罗斯油气商Rosneft公司签定了一份合同,为其提供三台SGT-800燃气涡轮机。这种工业化燃气涡轮发电机每台发电容量达45MW。它们将被用于Rosneft公司一家燃气发电厂,该电厂将由在西伯利亚的Priobskoye油田生产的相关石油天然气来提供原料,为所有与Priobskoye油田相关Rosneft工厂的主要供电来源。     

1．5MW风力涡轮机

Ge1．5Hw风机是广泛应用于全球风场的主力机型之一,全球装机超过8000台。GE1．5HW风力涡轮机具有长期运行的高可靠性。Ge1．5MW风机具有根据风速的大小而改变风机叶片倾角和转速的卓越性能,能够获取更多风能。     

Shape optimization of the turbomachine channel by a gradient method — Accuracy improvement

An algorithm of the gradient method of the channel shape optimization has been built on the basis of 3D equations of mass, momentum and energy conservation in the fluid flow. The gradient of the functional that is posed for minimization has been calculated by two methods, via sensitivities and - for comparison - by the finited ifference approximation. The equations for sensitivities have been generated through a differentiate-then-discretize approach. The exemplary optimization of the blade shape of the centrifugal compressor wheel has been carded out for the inviscid gas flow governed by Euler equations with a non-uniform mass flow distribution as the inlet boundary condition. Mixing losses have been minimized downslream the outlet of the centlifilgal wheel in this exemplary optimization. The results of the optimization problem accomplished by the two above-mentioned methods have been presented. In the case sparse grids have been used, the method with the gradient approximated by finite differences has been found to be more consistent. The discretization accuracy has turned out to be crucial for the consistency of the ~‘‘adient method via sensitivities.     

无火焰燃烧可减少氮氧化物排放

阿拉伯联合酋长国阿布扎比的石油研究所进行了一次无火焰氧化试验（FLOX）,受到世人瞩目。研究人员认为,FLOX工艺有可能防止气体涡轮机主要污染物之一的氮氧化物（NOx）排放。     

Vestas认为墨西哥具有10GW风力发电潜力

丹麦风力涡轮制造商Vestas最近已经签订合同供货132台涡轮机,用于396 MW Marena Renovables工程项目,该项目建后,将是拉丁美洲最大的风力发电厂。但是,Adrian Ktzew公司的墨西哥董事长,认为墨西哥风力发电潜力更大。     

Enhancement of natural circulation type domestic solar hot water system performance by using a wind turbine

Performance improvement of existing 200 litres capacity natural convection type domestic solar hot water system is attempted.A two-stage centrifugal pump driven by a vertical axis windmill having Savonius type rotor is added to the fluid loop.The windmill driven pump circulates the water through the collector.The system with necessary instrumentation is tested over a day.Tests on Natural Circulation System(NCS)mode and Wind Assisted System(WAS)mode are carried out during January,April,July and October,2009.Test results of a clear day are reported.Daily average efficiency of 25-28% during NCS mode and 33-37% during WAS mode are obtained.With higher wind velocities,higher collector flow rates and hence higher efficiencies are obtained.In general,WAS mode provides improvements in efficiency when compared to NCS mode.     

A twin unidirectional impulse turbine for wave energy conversion

A twin unidirectional impulse turbine has been proposed in order to enhance the performance of wave energy plant.This turbine system uses two unidirectional impulse turbines and their flow direction is different from each other.However,the turbine characteristics have not been clarified to date.The performances of a unidirectional impulse turbine under steady flow conditions were investigated experimentally by using a wind tunnel with large piston/cylinder in this study.Then,efficiency of the twin impulse turbine have been estimated by a quasi-steady analysis using experimental results.     

《热能动力工程》投稿须知

正《热能动力工程》是学术性与技术性相结合的国家核心期刊,被国际著名检索系统收录,曾获2003年第二届国家期刊奖百种重点期刊和2005年黑龙江省优秀期刊奖。报道内容:陆用/船用燃气轮机、汽轮机、锅炉等热能动力领域科研成果和传动元件技术、新能源等实用性强且具有推广价值的先进技术经验等。栏目设置:专题综述、热力涡轮机械、热力循环、热力工程、新能源动力技术和环保技术。1.投稿要求和注意事项1.1本刊接受电子稿件(一般不接受纸稿),投稿邮箱:rndlgch703@163.com,     

Counter-Rotating Type Tidal Stream Power Unit Mounted on a Mono-pile

The authors have invented a unique counter-rotating type tidal stream power unit, which is composed of tandem propellers and a double rotational armature type generator without a stator. The front and the rear propellers drive, as for an upstream type, the inner and the outer rotational armatures in the counter-rotating directions respectively, which keep the rotational torques counter-balanced between both propellers and armatures. This paper investigates experimentally the output and forces acting on a pile in a water channel, to get design materials of the mono-pile type tidal stream power unit. The output is maximal at the moderate rotational speed, as the same as a wind turbine. The force acting on the pile is affected by the drag, the Karman vortex and the dynamic balances of the tandem propellers, and has dominant frequencies due to not only the individual but also the interacting rotation of the front and the rear propellers.