煤质对锅炉性能及成本的影响

电站锅炉在燃用煤种发生变化时，其燃煤的品质会对锅炉设备及运行安全性，经济性产生较大的影响。文章主要从燃煤的角度，根据煤的特性参数的变化，就其对锅炉设备的影响，对锅炉经济性的影响；对排放的影响及对成本的影响进行分析和阐述。     

试论锅炉液位三冲量调节系统在锅炉运行中的保障作用

汽包液位是锅炉运行中的一个重要监控参数，它反映了锅炉负荷与给水的平衡关系。汽包液位过高会造成蒸汽带水影响过热器运行．影响汽水分离效果；水位过低会造成锅炉水循环的破坏，影响省煤器运行，容易使水全部汽化烧坏锅炉甚至爆炸。锅炉液位三冲量调节系统取代单、双冲量控制系统，使锅炉运行的经济性和安全性得到了可靠的保障，达到提高锅炉效率及节能降耗的目的。     

提高民用燃煤锅炉热效率的措施分析

根据燃煤锅炉热工测定，本文分析了影响锅炉热利用水平的主要因素，探讨了提高锅炉热效率的途径。     

CFB锅炉耐磨耐火浇注料脱落的原因及预防

循环流化床锅炉耐火耐磨材料的脱落常造成锅炉事故停炉，影响锅炉的连续安全、稳定、经济运行，文章分析了循环流化床锅炉耐火耐磨材料脱落的原因，并提出了相应的防范措施。     

CFB锅炉耐磨耐火浇注料脱落原因及其预防

CFB锅炉耐火耐磨材料的脱落常造成锅炉事故停炉，影响锅炉的连续安全、稳定、经济运行，文章分析了循环流化床锅炉耐火耐磨材料损坏的原因，并提出了相应的防范措施。     

锅炉定期检验中如何对缺陷做出正确的判断

锅炉定期检验后确实没有发现缺陷。或只有轻度不影响安全的缺陷为合格，即允许运行：发现了影响锅炉安全运行的缺陷，必须对缺陷部位进行处理（修理）的为有条件合格，即整改后运行：发现存在缺陷比较严重，不能保证锅炉在原额定参数下安全运行，或需缩短检验周期等条件限制，即限制条件运行：锅炉损坏严重，不能保证锅炉安全运行，即停止运行。     

飞灰回燃对燃烧福建无烟煤CFB锅炉运行影响的研究

利用热天平实验研究了飞灰碳厦其入炉煤的反应性，从理论上分析了飞灰回燃对CFB锅炉燃烧效率的影响，并通过工业试验测试了回燃飞灰量对锅炉返料器运行温度、飞灰的粒度分布及其含碳量、锅炉燃烧效率及其它运行参数的影响。研究表明，燃烧福建无烟煤CFB锅炉飞灰碳的反应性高于其对应入炉煤。回燃飞灰的含碳量、回燃飞灰量与入炉煤量的比值等参数对锅炉燃烧效率有重要影响。采取飞灰回燃技术有利于降低飞灰含碳、降低返料器运行温度和提高锅炉燃烧效率，但当回燃飞灰量较大时会影响锅炉的稳定运行。     

我区锅炉水处理存在的问题及对策

我区地处甘肃省陇东高原，在用的低压锅炉600多台，锅炉用水以地下水为主，个别地方采取地下水与地表水混合后使用，水中的含盐量较高，硬度在3～8mmol／L。到目前芫止，每年修理的锅炉中，由于水处理不良导致锅炉受，乐元件损坏的比例仍占多数，锅炉水处理成为影响锅炉安全经济运行的重要因素。     

分层式给煤装置在链条锅炉上的应用

分析了混煤在正转链条锅炉中燃烧情况及对锅炉热效率的影响，介绍了一种新型的分层式锅炉给煤装置在链条锅炉上的应用情况，指出未来链条锅炉改造的潜力与前景。     

影响汽包锅炉减温水量的主要因素

针对汽包锅炉的过热器和再热器，分析影响减温水量的主要因素，从而有效地控制和调节锅炉减温水量，确保锅炉的安全经济运行。     

火电厂节能工作浅析

本文探讨了火电厂节能基本程序和工作方法,分析节能工作要从基础工作、技术创新、设备整治、燃烧管理等方面入手的论述.     

浅析磨合期汽车的使用

如何合理使用磨合期的汽车，使其摩擦机件的磨损量能够平稳、均匀地磨合而不至于过度磨损，对汽车实际使用寿命有着重要的意义。从机器磨合期的特点和磨损机理出发，对汽车磨合期如何正确使用进行了有实际意义的探讨。     

Geothermal energy in agriculture in Yugoslavia

SFR Yugoslavia has natural hot water springs practically all over its territory, indicating the presence of geothermal reservoirs underground. There is no final estimate of how much energy can be expected from this new resource, except for figures based on the results of studies and investigations.The first use of geothermal energy in Yugoslavia in numerous spas dates back to the 19th century. Some remarkable examples of central heating are known, but the most widespread use is in agriculture (in greenhouse heating, farm heating and drying of agricultural products).     

Energy conservation measures in an institutional building in sub-tropical climate in Australia

In this study, various energy conservation measures (ECMs) on heating, ventilating and air conditioning (HVAC) and lighting systems for a four-storied institutional building in sub-tropical (hot and humid climate) Queensland, Australia are evaluated using the simulation software called DesignBuilder (DB). Base case scenario of energy consumption profiles of existing systems are analysed and simulated first then, the simulated results are verified by on-site measured data. Three categories of ECMs, namely major investment ECMs (variable air volume (VAV) systems against constant air volume (CAV); and low coefficient of performance (COP) chillers against high COP chillers); minor investment ECMs (photo electric dimming control system against general lighting, and double glazed low emittance windows against single-glazed windows) and zero investment ECMs (reset heating and cooling set point temperatures) are evaluated. It is found that the building considered in this study can save up to 41.87% energy without compromising occupancies thermal comfort by implementing the above mentioned ECMs into the existing system.     

Energy consumption in rural transportation in India

Energy consumption in rural transportation has been computed, taking into account the energy embodied in vehicles or bullocks, as well as the fuels or feeds and food (of operators). Bullock cart transport consumes over four times more energy than vehicles. However, animal transport will continue to be preferred because of its availability.     

Leading-edge Technologies in Hydropower Development in China

After the implementation of the Reform and Opening-up Policy for a period of 40 years, the exploitation of China’s hydropower resources developed significantly. Through vast amounts of scientific and technological research and construction practices, China has accumulated abundant engineering experience with respect to the construction technologies required for 300-meter-high concrete arch dams, 200-meter-high roller-compacted concrete gravity dams, 200-meter-high concrete face rockfill dams, and 250-meter-high earth core rockfill dams, large-flow discharge and energy dissipation, huge underground cavern group constructions, complicated foundation treatments for high earth and rockfill dams and high and steep slope reinforcements. These series of technologies have now reached an international leading level. In the near future, these technical improvements will likely have broader application prospects and make greater contributions toward hydropower development both in China and across the world.     

Uncertainties in decarbonising heat in the UK

Heating is arguably one of the most difficult sectors to decarbonise in the UK's energy system. Meeting the 80% greenhouse gas emission reduction target by 2050 is likely to require that heat related emissions of CO₂ from buildings are near zero by 2050, and there is a 70% reduction in emissions from industry (from 1990 levels). Though it is clear that the use of the natural gas network will reduce over time, recent modelling suggests a limited residual role for gas by 2050 to help meet peaks in heat demand. High levels of uncertainty about the way in which heat will be decarbonised present a number of challenges to policy makers. This paper will explore the risks and uncertainties associated with the transition to a low carbon heat system in the UK as outlined by the 4th carbon budget review. The potential impact of key uncertainties on the levelised costs of heat technologies and the development of energy networks are explored using a sensitivity analysis approach. Policy changes required to decarbonise the heat sector are also examined.     

Viscous heating in liquid flows in micro-channels

Many experimental works on forced convection through micro-channels evidenced that when the hydraulic diameter is less than 1 mm, conventional theory can no longer be considered as suitable to predict the pressure drop and convective heat transfer coefficients. This conclusion seemed valid for both gas and liquid flows. Sometimes the authors justified this claim by invoking “new” micro-effects. On the contrary, in this paper the explanation of the experimental results obtained for micro-channels in terms of friction factors will be researched inside the conventional theory (Navier-Stokes equations). In particular, this paper will focus on the role of viscous heating in fluids flowing through micro-channels. A criterion will be presented to draw the limit of significance for viscous dissipation effects in micro-channel flows. The role of the cross-sectional geometry on viscous dissipation will be highlighted and the minimum Reynolds number for which viscous dissipation effects can no longer be neglected will be calculated as a function of the hydraulic diameter and of the micro-channel geometry for different fluids. It will be demonstrated how viscous effects can explain some experimental results on the Poiseuille numbers in micro-channels, which recently appeared in the open literature.