火电厂脱硫变动成本分析

分析了火电厂烟气脱硫变动成本的构成,探讨了影响脱硫变动成本的因素,提出了控制脱硫变动成本和调整脱硫电价的建议。     

火电厂竣工环境保护验收工作的管理和建议

竣工环境保护验收是检查环保＂三同时＂制度执行情况的重要环节,也是环保监督管理的重要内容。从竣工环境保护验收工作的相关法律、法规出发,依据火电厂验收技术规范,并结合火电厂竣工环境保护验收工作实践,阐述了火电厂验收工作的相关规定及流程,并结合验收工作中经常出现的问题,给出改进建议。     

我国“十一五”火力发电企业关停容量及节能分析与建议

从我国节能减排的政策出发,分析了“十一五”期间我国已关停的小火电机组容量、机组装机范围、企业分布等特征,以及其节能降耗与环保效果。预测了“十一五”关停小火电机组容量,并提出了相关建议。     

Experimental investigation on the phase change material-based modular heat exchanger for thermal management of a building

A phase change material (PCM)-based flat plate modular heat exchanger for free cooling application, suitable for the diurnal temperature variation that prevails during the summer months of Bangalore city, India is designed and experimentally investigated. The flow and other parameters selected in the present study are meant to suit the accelerated charging of the PCM in the modular heat exchanger during the early morning hours, and to provide cool energy to the room during the daytime, by circulating the ambient air through the heat exchanger at a lower velocity. It is observed from the charging experiments that the decrease in the inlet air temperature has more influence in reducing the solidification time than the increase in the inlet air velocity. The heat exchanger designed in the present investigation is capable of maintaining the room temperature around 30°C for a longer duration of 8 hr when the heat load is 0.5 kW. It is suggested to design the modular heat exchanger with a surface area proportionate to the present heat exchanger size when the room heat load increases beyond 0.5 kW, in order to maintain a minimum comfortable temperature of 30°C in the room.     

Simplified heating time calculation using the Schmidt graphical method for PCB-contaminated capacitors undergoing the vacuum thermal recycling process

We discuss the use of the Schmidt graphical method to calculate the time required to heat a polychlorinated biphenyl (PCB)-contaminated capacitor in the vacuum thermal recycling process to the processing temperature of 400°C, and we evaluate the results of the heating time calculation by comparing the calculated values with the corresponding experimental values. The thermal conductivity and specific heat of the insulating paper and the carbonized paper in the capacitor were unknown, so we determined their values from experimental data obtained during the vacuum thermal recycling process. The capacitor element is a multilamination of aluminum foil and insulating paper, so we used an equation for a multilayer plane wall to calculate the value of the thermal conductivity. For the thermal conductivity and specific heat of the insulating paper impregnated with PCBs, we used values calculated from the mass ratios and thermal conductivities and specific heats of the individual materials. In addition, the physical properties vary according to the treatment because of the evaporation of PCBs and the carbonization of the insulating paper, so we modified the values of the thermal conductivity, specific heat, and density at the boiling point of the PCB and the carbonization point of the insulating paper before performing the calculations. Our calculated heating times were almost the same as, or were above, the experimental values, so we concluded that our method can be used as a simple calculation of the heating time.     

基于红外热成像技术烃类火灾下沉管隧道开裂分析

为了研究烃类火灾下沉管隧道的开裂深度,建造沉管隧道缩尺模型,采用HCinc升温曲线在沉管隧道左、右两侧孔内同时开展明火试验。在沉管隧道火灾试验过程中,利用热电偶和红外热像仪测量沉管隧道的温度场变化,利用红外热像仪对混凝土裂缝位置的温度变化进行监测。基于混凝土内水分迁移原理,结合混凝土裂缝中水和水蒸气的温度变化及混凝土内温度场分布,推断出在点火95 min时,混凝土裂缝开展深度超过150 mm。研究结果表明：在沉管隧道内部发生火灾的情况下,受火侧受热膨胀容易导致沉管隧道外侧混凝土受拉开裂,在沉管隧道抗火设计中,建议考虑内外侧温差导致的混凝土开裂问题。     

常压及低压下锂电池热失控随数量变化特性

为明确在地面常压环境和商用飞机巡航高度低气压环境下锂电池热失控火灾危险特性随电池数量的变化关系,分别于95 kPa地面常压环境和20 kPa低压环境下,开展不同电池数量梯度的热失控试验,测量热释放速率,总热释放量,烟气温度,CO、CO2和碳氢等气体的实时体积分数.结果表明:最高热释放速率和总热释放量与电池数量均呈幂函数...     

新型组合式消防服热防护性能分析

本文对不同隔热层材料组成的消防服的热防护性能进行了实验测试与分析验证,评价了新型组合式消防服和传统组合式消防服的隔热性能优劣。结果表明以SiO2气凝胶材料为隔热层的新型组合式消防服的导热系数约为传统型的1/4,具有更显著的热防护效果。     

山地城市热污染研究及治理对策

城市热污染给人们带来的众多危害已经引起了广泛的关注。山地城市由于其特殊的地理因素,城市热污染也呈现特殊性。本文详细分析了山地城市的热环境特征以及热污染成因,并从治理城市热污染角度提出了部分有效的治理对策。通过合理的城市规划、城市绿化、城市风道、城市下垫面及其他措施,以达到减少山地城市热污染,改善城市热环境,保障城市居民健康,最终实现山地城市可持续发展的目的。     

排污许可审计式合规核查研析——以火电企业为例

针对排污单位证后守法情况,以火电企业为例,设计了三阶段的“审计式”合规核查机制,主管部门可以依次对执行报告及其支撑材料、自行监测和台账记录等内容进行完整性、规范性、逻辑性核查,以识别企业在按证守法方面存在的问题,发现企业存在的未按期提交执行报告、未按技术规范要求计算排放量、台账数据不合逻辑等潜在的线索,为下一步进行现场检查及现场执法提供指引。