直膨式太阳能辅助热泵空调热水器及热经济分析

研究了一种直膨式太阳能辅助热泵(DX-SAHP)空调热水器.它由室外机、室内机和热水单元组成,是一种利用DX-SAHP技术和空气源热泵空调热水技术的中央采暖、空调、热水一体化热泵设备,适用于住宅集中采暖、空调、供热水,也可用于小型饭店、旅馆和小型办公楼.系统的基本运行模式包括制冷、采暖、制热水,可能的衍生模式包括制冷的同时制热水、采暖的同时制热水、以及除霜.介绍了其制冷(夏季空调)、采暖、制热水三种典型运行模式,分析了其节能减排情况.与空气源热泵空调热水器相比,DX-SAHP空调热水器的制热年均性能系数可提高25%以上,具有很好的推广应用价值.     

海尔热水空调 高品质家居生活的首选

近日,海尔中央空调新上市的1款热水空调采用废热回收技术,通过垂直整合为用户带来了更加低碳环保的舒适享受,同时其将家中的空调、热水器、地暖等心有灵犀的关联到了一起,为人们提供了1种未来的生活方式。     

一年节电1020亿kWh 海尔热水空调方案“领秀未来”

为用户提供系统解决方案一直是海尔中央空调孜孜以求的目标。近日,海尔中央空调新上市的一款热水空调采用废热回收技术,通过垂直整合为用户带来了更加低碳环保的舒适享受,同时其将家中的空调、热水器、地暖等心有灵犀的关联到了一起,也为人们提供了一种未来的生活方式。     

年节电1020亿kWh海尔热水空调方案“领秀未来”

为用户提供系统解决方案一直是海尔中央空调孜孜以求的目标。近日，海尔中央空调新上市的一款热水空调采用废热回收技术，通过垂直整合为用户带来了更加低碳环保的舒适享受，同时其将家中的空调、热水器、地暖等心有灵犀的关联到了一起，也为人们提供了一种未来的生活方式。     

蓄能和热水器复合空调器冬季运行试验研究

为解决冬季热泵供热能力不足和热泵除霜时室内吹冷风、舒适性下降等问题，作者提出了一种全年蓄能和热水器复合空调器装置。复合空调器夏季可实现蓄冷、放冷制冷和提供生活热水等功能，冬季可实现制热-蓄热功能，提高热泵制热能力，同时蓄热。蓄热可实现制热-除霜功能，在除霜的同时保持一定的制热量，从而提高室内的舒适性，并对由标准空调器改造样机冬季运行进行了试验研究，成功地实现了制热-蓄热、制热-除霜和提供生活热水等功能。     

地源热泵供热水-空调冷热联供综合系统的实验研究

介绍了作者自主设计实施的地源热泵热水-空调冷热联供系统,运用单因素方法,研究地埋管总深度、地埋管及空调的循环介质流量等对热泵系统运行特性的影响,提出土壤源制热水和冷热联供两种工况下的合理运行方式。研究结果表明土壤源制热水间歇运行时既满足生活热水需求,又避免土壤源长期过度取热;夏季采用空调冷凝热为建筑制冷的同时制取生活热水,机组综合能效比达1:7以上,使热水系统全年运行成本大大降低。     

多功能热泵空调热水器的实验研究

提出了一种多功能热泵空调热水器装置,对正在进行试验研究的多功能热泵空调热水器装置的基本原理和构成进行介绍,并对其在热泵制热水模式下的运行工况进行了实验研究。给出了一些重要参数的实验结果,并分析讨论了各参数变化对系统的影响,实验表明这种多功能热泵空调热水器装置经济节能。     

强者格力 巅峰科技引领新方向

近日,在中国轻工业联合会组织的"格力冷暖辐射生活热水多功能一体地暖户式中央空调"科技成果鉴定会上,由格力电器和东南大学共同研发的"冷暖辐射生活热水多功能一体地暖户式中央空调"被专家组一致鉴定为"国际领先"水平。当前,国家节能环保要求日益提高,城市居住面积紧张以及人们对于舒适度的要求,使空调、制热水等多功能一体机成为行业发展的新方向。     

空调冷热源选择能耗分析

分析了常用空调冷／热源（电制冷／热泵、溴化锂机组、燃气机机组和燃气锅炉）和生活热水（燃气和电热水器）的一次能源利用率,认为可在电力有保障的情况下优先考虑使用电动机组作为空调的冷热源;对电网峰谷差比较大而燃气充足的地区可采用燃气机组作为空调的冷热源;而单效溴化锂机组仅用于有余热利用的场所;生活热水应使用燃气热水器;不提倡使用电锅炉作空调的热源或电热水器提供生活热水。     

冷暖空调热水三用机的功能控制

介绍了一种多功能热泵热水机的工作原理及其在空调、供暖气和制热水多个模态运行时的控制逻辑要求;讨论了热泵的热水换热器三种加热形式:循环加热式、一次加热式和间歇加热式的特点,以及根据进水温度通过调节进水和中间循环水量来满足出水定温要求的方案.本文的研究工作对提升多功能热泵热水机技术具有重要的参考价值.     

Minimal Realization of Linear Graph Models for Multi-physics Systems

An engineering system may consist of several different types of components,belonging to such physical"domains"as mechanical,electrical,fluid,and thermal.It is t...     

INTEGRAL EQUATION METHOD＇S APPLICATION IN HOLE-EDGE STRESS OF COMPOSITE MATERIAL PLATE WITH DIFFERENT SHAPED HOLES

The strength of composite plate with different hole-shapes is always one of the most important but complicated issues in the application of the composite material. The holes will lead to mutations and discontinuity to the structure. So the hole-edge stress concentration is always a serious phenomenon. And the phenomenon makes the structure strength decrease very quickly to form dangerous weak points. Most partial damage begins from these weak points. According to the complex variable functions theory, the accurate boundary condition of composite plate with different hole-shapes is founded by conformal mapping method to settle the boundary condition problem of complex hole-shapes. Composite plate with commonly hole-shapes in engineering is studied by several complex variable stress fimction. The boundary integral equations are founded based on exact boundary conditions. Then the exact hole-edge stress analytic solution of composite plate with rectangle holes and wing manholes is resolved. Both of offset axis loadings and its influences on the stress concentration coefficient of the hole-edge are discussed. And comparisons of different loads along various offset axis on the hole-edge stress distribution of orthotropic plate with rectangle hole or wing manhole are made. It can be concluded that hole-edge with continuous variable curvatures might help to decrease the stress concentration coefficient; and smaller angle of outer load and fiber can decrease the stress peak value.     

Non-monotonic material contrast in scanning ion and scanning electron images

30 keV Ga⁺ focused ion beam induced secondary electron (iSE) imaging was used to determine the relative contrast between several materials. The iSE signal compared from C, Si, Al, Ti, Cr, Ni, Cu, Mo, Ag, and W metal layers does not decrease with an increase in target atomic number Z₂, and shows a non-monotonic relationship between contrast and Z₂. The non-monotonic relationship is attributed to periodic fluctuations of the stopping power and sputter yield inherent to the ion–solid interactions. In addition, material contrast from electron-induced secondary electron (eSE) and backscattered electron (BSE) images using scanning electron microscopy (SEM) also shows non-monotonic contrast as a function of Z₂, following the periodic behavior of the stopping power for electron–solid interactions. A comparison of the iSE and eSE results shows similar relative contrast between the metal layers, and not complementary contrast as conventionally understood. These similarities in the contrast behavior can be attributed to similarities in the periodic and non-monotonic function defined by incident particle–solid interaction theory.     

Application of Feature Extraction through Convolution Neural Networks and SVM Classifier for Robust Grading of Apples

This paper proposes a novel grading method of apples,in an automated grading device that uses convolutional neural networks to extract the size,color,texture,an...     

分布动态载荷识别的抗噪处理

针对正交多项式频域法在用多种响应对矩形薄板进行载荷识别中抗噪性较差的问题,综合运用平均法、矩阵预处理和奇异值截断法等方法对之进行改善,并引入空间映射的思想,将该方法的应用范围拓展为复杂的模型.利用仿真算例,证实了该方法具有较好的抗噪性.     

基于MELTAC-N平台的核电厂安全级DCS环网研究与测试

针对工程实践中环网通讯相关问题的处理缺乏理论基础及国产化安全级DCS平台的开发缺乏成熟经验借鉴问题,对基于MELTAC-N平台核电厂安全级DCS环网的软硬件实现进行了研究。提出了安全级DCS环网双环网冗余设计、光切换开关设计等硬件设计方法,以及以RPR协议为基础,采用全数据收发策略的软件设计方法。在CPR1000安全级DCS平台上对安全级DCS环网的可靠性及实时性进行了评价,并进行了容错能力、响应时间及响应时间稳定性测试验证实验。结果表明,基于MELTAC-N平台安全级DCS环网软硬件设计具有较好的容错能力及响应时间稳定性。     

Short-Term Relay Quality Prediction Algorithm Based on Long and Short-Term Memory

The fraction defective of semi-finished products is predicted to optimize the process of relay production lines, by which production quality and productivity ar...     

End-to-End Multiview Gesture Recognition for Autonomous Car Parking System

The use of hand gestures can be the most intuitive human-machine interaction medium.The early approaches for hand gesture recognition used device-based methods....     

The laboratory simulation of abrasive wear

Abrasive wear has long been recognised as one of the most potentially serious tribological problems facing the operators of many types of plant and machinery; several industrial surveys have indicated that wear by abrasion can be responsible for more than 50% of unscheduled machine and plant stoppages. Locating the operating point of a tribological contact in an appropriate operational ‚map’︁ can provide a useful guide to the likely nature and origins of the surface degradation experienced in use, though care must be exercised in choosing the most suitable parameters for the axes of the plot. Laboratory testing of materials and simulations of machine contacts are carried out for a number of purposes; at one level for the very practical aims of ranking candidate materials or surface hardening treatments in order of their wear resistance, or in an attempt to predict wear lives under field conditions. More fundamentally, tests may be aimed at elucidating the essential physical mechanisms of surface damage and loss, with the longer term aim of building an analytical and predictive model of the wear process itself. In many cases, component surface damage is brought about by the ingress of hard, particulate matter into machine bearing or sealing clearances. These may be running dry although, more usually, a lubricant or service fluid is present at the interface. A number of standardised wear test geometries and procedures have been established for both two- and three-body wear situations, and these are briefly described. Although abrasive wear is often modelled as following an ‚Archard’︁ equation (i.e. a linear increase in material loss with both load and time, and an inverse dependence on specimen hardness) both industrial experience and laboratory tests of particularly lubricated contacts show that this is not always the case: increasing the hardness differential in an abrasively contaminated lubricated pair may not always reduce the rate of damage to the harder surface.     

ANGULAR DISTORTION ALLOWABLE VALUE AND ASSESS METHOD OF WELD ON COKE TOWER

A graph as the new engineering method for estimate the safety of bulging deformation of coke tower is proposed. Through stresses analysis of circumferential weld of coke tower and comparing the stresses produced by pressure with heat stress of steady state, residual stress, bending stress produced by both itself weight and wind loads, it showed that the stresses produced by pressure on the angle distortion are the main factor of equivalent stress of the combined stress. After comparing four kinds of stress controlling conditions, the relation to stress with depth of angular distortion, grade of curvature of angular distortion and half of region of angular distortion has been inferred. Graph of deformation allowable value of coke tower for different condition by angular distortion and half of region of angular distortion has been plotted. The five steps for its engineering use have been explained. The lighter the grade of curvature is, the larger of bulge allowance, may be, and the bigger of depth of angular distortion may pose too. For the coke tower with a popular structure of Dg 5 400 mm×28 mm, the result by graph is nearly more than the result of two formulas formed by other research, the error is less than 7.0%. But, the graph can be easily applied to different size of angular distortion.