Study on Simulation Method of Heating and Air - conditioning Energy Consumption of Residential Buildings

The heating and air conditioning energy consumption of residential buildings is influenced by the behavior of indoor living personnel.On the basis of research and analysis,two kinds of calculation modes reflecting the behavior of indoor living personnel are estimated.Under two kinds of different calculation modes,by using the building thermal environment simulation Toolkit DeST to simulate the energy consumption calculation for certain residential building in Shanghai,and the simulation results are compared with the research results.The influence of calculation mode on heating and air conditioning energy consumption of residential buildings in Shanghai is analyzed in this paper.In order to obtain the right simulation calculation method correctly reflecting the energy consumption of residential buildings.This method can be used for analysis and evaluation of heating and air conditioning energy consumption of residential buildings in Shanghai,and it can serve as instruction for right energy design of residence building.     

猪肉的通电加热研究

研究了猪肉的通电加热工艺和猪肉通电加热后质构的变化,并与传统的加热方式进行了比较。结果表明,猪肉煮制时间为25min最佳,当猪肉的煮制时间延长,蒸煮后肉的硬度随之增大,弹性、咀嚼性增大,猪肉的口感也相应得到改善。通电加热煮制的猪肉,口感明显好于电炉加热。     

Experiments and Numerical Simulation of Flow Distribution with Larger Flux in Multi-branch Pipe

Many heating process with smoking gas involves the uniformity problem of flow distribution with larger flux in multi-branch pipe. The authors do the experiments and numerical simulation of flow distribution with larger flux in multi-branch pipe, which gets flow regulation in distributing pipe and the methods to improve flow distribution uniformly. Experiments have shown that improving the frame of distributing pipe may realize the flow distribution uniformly to the pipe with larger flux and multi-branch.     

Laser Heat Treatment to Camshaft in Diesel Enging

The blacken way and laser parameters of technology for QT60-2 have been optimized. The regression equations on the depth and width of the hardened layer between technology parameters have been set up resoectively. The camshaft in C4102 diesel engine has been been heated with laser. The results show that the average depth of hardened layer is more than 0. 31mm, the average hardness on surface is no lower than Hv0.1940,and the maximum deformation of radial rake is controlled within 0. 02mm.     

苜蓿叶蛋白提取工艺条件对蛋白质含量的影响

研究了加热法提取工艺条件对苜蓿叶蛋白质的含量的影响。通过不同ｐＨ值和苜蓿的不同生长期的单因素，以及不同加水比例，加盐比例，提取液ｐＨ值和絮凝温度对蛋白质含量影响的多因素试验，得出了制取高蛋白质含量叶蛋白的提取工艺条件。     

日光温室冬季加温热负荷的计算和热风炉补温试验验证

【目的】研究日光温室冬季补温热负荷以及相应加温设备配套功率选型的准确性,计算日光温室冬季能耗的热损失,研究温室专用热风炉补温设备与理论计算能耗一致性问题。【方法】分析温室的总体热损失,研究各个围护结构的热工性能,取值计算温室总热损失量,分别计算出温室围护结构热损失、冷风渗透热损失以及温室内地面热损失占温室总散失热量的比例。【结果】温室理论计算单位面积能耗为166 W/(m²·h);单位面积能耗为142 W/(m²·h),二者基本趋于一致。【结论】各个围护结构的热工值取值合理,温室加温设备配套功率选型较为准确。温室加温热负荷计算时,不应考虑白天温室获得的太阳辐射热量,应将温室夜间最低温度时刻和极端灾害气候下温室需要补充满足的热量作为温室的加温热负荷值。     

农村生物质气化燃气分散供暖经济和环境效益分析

为了充分利用农业废弃物资源,改善北方农村冬季供暖条件,该文对生物质气化燃气分散式供暖技术进行了经济和环境效益分析,探讨其在农村供暖中的可行性。生物质气化分散式供暖具有节约能源、减少大气污染、温度调节方便等优点。通过借鉴天然气分散式供暖的研究成果和对生物质气分散式供暖进行分析,结果表明采取分段式控温、分房间控温和建筑物节能改造等手段可将供暖费用降到合理水平,基本与城市供暖费用相同。通过该文分析可知生物质气化燃气分散式供暖可以作为农村供暖的一种新模式。     

大颗粒低填充率外热式回转窑传热系数模型的构建

为了能较精确地预测大颗粒低填充率外热式回转窑内壁与颗粒间的传热系数,该文在对外热式回转窑传热机理分析的基础上,提出了回转窑内壁与物料颗粒间换热的基本构成为:窑内壁与气体介质间的导热、气体介质与颗粒间的对流以及窑内壁与颗粒间的辐射换热。在此基础上,建立了预测窑内壁与颗粒间总传热系数的数学模型,并以6 mm直径的氧化铝球为物料,在5%填充率下,分别在回转窑转速1,2,3 r/min,窑体壁面温度在220~420℃的11种不同壁温条件下测量了窑体内壁与颗粒间的传热系数,对模型进行验证。试验结果表明,模型预测的误差小于10%,可满足工程计算的精度要求;该文所采用的试验物料及试验条件下,在窑壁温度高于220℃时,辐射传热系数所占的比例高于75%,是总传热系数的主要构成部分。研究结果可为外热式回转窑传热机理的深入研究提供参考。     

热媒炉洗炉和导热油再生可行性研究

在管道输送原油的间接加热中,作为热媒的导热油长期在高温下使用,必然会发生老化变质。变质的导热油酸值增大,胶质增多,对管道产生腐蚀作用;胶质、沥青质附着在管壁上会降低加热炉的传热效率,严重时可引起炉管结焦、穿孔。要改变这种状况,就要对报废的导热油进行更换。在阐述导热油的老化机理、报废指标和检测内容的基础上,为了降低置换新油的费用,提出了建立流动的导热油再生装置的设想。试验室试验结果说明,对导热油进行再生和用导热油洗炉可降低成本,且再生油质量优于新油。     

纵向翅片管式换热器的失效分析及改造措施

以埕岛油田中心二号平台纵向翅片管式原油/热媒换热器技术改造为例,分析了纵向翅向管式换热器常见的3种失效形式,并指出了其相应的改进措施。改造后的运行效果表明,纵向翅片管式换热器的使用寿命是改造前的2倍,且运行平稳。