Design of Cooling/Heating Floor AC Systems in Residential Buildings

This paper puts forward a new way in air_conditioning,which combines the fresh_air supply unit and such floor radiation system for the dehumidication and cooling in summer or heating in winter. By analyzing its advantages and limitations, it is found that this so called Cooling/Heating Floor AC System can improve the IAQ of residential building while keep high efficiency quality. It is also recommended that an methodology for the HVAC system designing,which will ensure the reduction of energy cost of users.     

Design and Analysis of the Air Flow and Distribution of Laminated Air Conditioning in Summer in the Powerhouse of Sanxia Hydropower Station

Around the design of air flow and distribution about the laminated air conditioning in summer in the powerhouse of Sanxia hydropower station, the system division, air flow pattern, air supply state and volume etc have been analyzed separately. Based on the existing domestic achievements, the relative calculation model has been established and the application method has been explored. From this the program named as AFDC/LACS has been compiled with language FORTRAN77 and the calculation on the airflow and distribution of the place mentioned above has been done with several design conditions. Thus some batches of the technical parameters have been provided to plan the test conditions in the heat simulated test..     

Exploration of Positive Pressure Mechanical Air Supply System

The problems are discussed in positive pressure mechanical air supply system design, when the actual status is far different from what figures in the code based. Expressions must be used to determine the supply air rate. The rate between length and width of rectangle air channel should be less than 6. To avoid some uncertain factor, correction factor for absolute coarseness should choose the bigger figure. The smoke control and extraction design of smoke controlling stair hall must be divide into two parts: The overground and the underground. When setting positive pressure mechanical air supply system in smoke controlling stair hall, the outer window in the hall must be fixed. To insure the inner surface of smoke controlling stair hall keep compact and lubricity, communion should be done with governor of builders.     

Laboratory Simulation to Remove Petroleum Pollutant in Groundwater by Using Air Sparging

Based on the stratigraphic configuration of the oil-contaminated sites in Northeast China, the efficient and best experimental conditions to remove oil pollutants in a relatively heterogeneous aquifer using air sparging were investigated. The results show that for Complex formation, the remediation of AS technology is efficient. It was shown that when air flow rate was 300ml/min, the removal rate of benzene, naphthalene were 99.54% and 11.58%, respectively. When the medium was layered heterogeneous porous media, the removal rate of continuous air sparging is superior to intermittent air sparging. In the whole experiment, the removal efficiency of naphthalene was very low which may be own to its structure and properties and the heterogeneous of the medium. When the Semi-volatile contaminants exist, considering the use of other combined remediation technique was necessary.     

Model Experiment and Primary Research of Laminated Air Conditioning in the Powerhouse of Three-Gorges Hydropower Station in Summer

In this paper, the model experiment of laminated air conditioning in the powerhouse of Three-Gorges Hydropower Station was introduced. To assure the effect of air conditioning, the influence of different roof temperature, air supply velocity and Ar number on air distribution was analyzed and studied. Some conclusions have been drawn.     

Winter Air-conditioning I-d Pattern Design of Fan-coil Units

For the most common fresh air handling way supplying fresh air directly into the rooms after it has been handled in fan coil with outdoor air systems, the paper gives the design method of i d pattern in winter air conditioning operating mode, which determines the state of supply air of fan coil units and the final parameter of winter fresh air througn the ratio of fresh air. For selecting the final parameter of fresh air after it has been handled,the authors gives three conditions:Winter fresh air is handled to room enthalpy;Winter fresh air is handled between room enthalpy line and room temperature line; Winter fresh air is handled to room temperature or a little lower than room temperature. The comparing result show that the second method is desirable after comparison.     

濮阳市最高气温和最低气温非对称变化趋势分析

提要：运用1960-2008年以来濮阳逐月和年平均最高、平均最低以及平均气温和相应的极端气温资料,借助线性分析和年代跃变分析的方法,研究其长期变化趋势和年际变化,结果表明：濮阳的夏季平均最高气温呈下降趋势、冬季最低气温和年平均气温呈现明显上升趋势,冬季增温主要在夜间,夏季降温主要在白天。全年的平均增温主要是由冬季夜间引起的。     

Evaluation and Analysis of Bacteria Pollution in Dwelling Indoor Air

Tests and study were carried out on indoor air bacteria pollution in dwelling house inChongqing city. Based on the data of measured bacteria concentration of the indoor air,the reasons for indoor air pollution were analyzed. Ith was found that the bacteria seriously polluted the indoor air. The main factors influencing the indoor air bacteria pollution are moisture, natural ventilation and lighting conditions. The construction forms and decoration of the dwelling house are the secondary reasons for indoor air bacteria pollution. Measures and suggestions of preventing the indoor air bacteria pollution and improving the indoor air quality and environmental quality were presented.     

果蔬强制通风预冷过程中温度场分布的分析

果蔬预冷是冷链的首要环节之一。以100 t冷库为研究对象,建立了气体区和果蔬区的数学、物理模型,采用k-ε紊流模型和非稳态求解方法,运用计算流体力学软件对果蔬预冷降温过程进行了三维非稳态数值模拟。在其他参数相同的条件下,比较分析了不同风速和送风方式下的温度场分布情况。结果表明：送风速度对库内温度场有显著影响,温度随风速的增大而降低,且温度梯度逐渐减小;对比两种送风方式,上送下回送风方式预冷均匀性较好。     

立式气箱径向通风试验报告

本试验取鉴径向通风的基本原理,采用立式气箱和复壁导流管相结合的通风设计,基本上实现了中小型房式仓散储粮堆的“不揭膜”通风工艺,取得了较为理想的均衡通风效果.     

不同类型烤房中烟叶水分动态变化规律

为了掌握密集烘烤中烟叶水分变化规律,提高烟叶烘烤质量,研究了密集烘烤和普通烘烤过程中烟叶水分含量的动态变化。结果表明,气流上升式烤房、气流下降式烤房、普通烤房中烘烤的烟叶失水规律都是呈反S型;不同烤房、不同部位烟叶脱水速度不同。气流下降式烤房失水最慢,气流上升式烤房次之,普通烤房失水最快。同一烤房不同部位叶片失水速度,腰叶＜上二棚叶＜顶叶。     

KT系列内燃机空气粉尘滤清器及其净化效率试验计算公式的变更

KT系列内燃机空气粉尘滤清器是国家最新专利产品,是阻隔式纸制滤清器的更新换代产品,是纸制滤清器的一次革命。在恶劣的空气环境下,KT系列内燃机空气粉尘滤清器的使用效果尤其明显,也可与原纸制滤清器匹配使用。该产品在使用过程中,不需要更换滤芯,仅需添加一定量的溶液即可。针对国家标准中净化效率试验计算公式不适用的问题对该公式变更,经上海内燃机研究所测试使用,认为变更公式正确。     

不同风速对温室厚皮甜瓜容器苗性状的影响

为了明确增加温室空气流动来培育厚皮甜瓜壮苗的实际效果和适宜的风速。本研究以不补风（V0）为对照,比较了风速分别为V1(0.1m/s)、V2(0.5m/s)、V3(0.9m/s)的机械补风处理对“伊丽莎白”厚皮甜瓜容器苗一些性状的影响。结果表明：补风处理后,茎粗、叶片厚度、全株干质量、子叶的叶绿素b含量增加,株高减小,其中后4个指标随着风速的增加变化越明显;与V0处理相比,V2和V3处理后,壮苗指数明显增大,其中V3处理后,根冠比明显增大,但真叶光合速率和叶绿素含量下降,而V2处理后,真叶数、根粗度增加,真叶光合速率和叶绿素含量上升。可见,增加空气流动明显提高了厚皮甜瓜容器苗质量,其中,0.5m/s的风速适宜在生产上使用。     

淡水鱼塘分层水温的变化特征

为了指导淡水养殖鱼塘水温的科学调控,保障水体生物安全越冬度夏,笔者选用武汉地区2011年3月至2012年2月淡水养殖鱼塘不同深度的水温数据及对应岸边的气温数据,应用数理统计分析方法分析其在不同时间尺度上的变化规律。结果表明：日尺度下不同深度水温日内的变化趋势与气温一致,气温的振幅较水温大,晴天气温及不同深度水温的振幅明显大于阴天。月尺度下3—7月气温及各层水温总体呈上升趋势,4月各层水温上升最显著;水温随深度增加而降低的趋势在晴天较多云天显著,阴天该趋势不明显。8月至次年2月,气温及各层水温呈下降趋势,1月下降最显著,水温随深度的变化呈降-升-降模式或降-升模式。季节尺度：水温随深度增加而降低的速率从大到小依次为春季、夏季、秋季,冬季水温随深度增加呈降-升-降模式。该结果可为武汉养殖池塘科学管理提供指导,也可为养殖鱼塘水温预报奠定基础。     

Exploring Some Problems in the Design of Air Conditioning of Zunyi TV Building

In this paper the general engineering situation of Zunyi TV Building was presented. Then, the determination of indoor design parameters, selection of cooling and heating loads of air conditioning and cold and heat sources units, design of air conditioning systems, control of air speeds and forms of air distribution, control of device noises of air conditioning and decrease of vibrations were introduced.     

Study on the Effects of Air Pollution on Corrosion of Carbon Steel

This paper summarizes the results obtained from the first year atmospheric corrosion test of carbon steel specimens exposed in 12 sites in Asia. As shown by the results, the corrosion rates of carbon steel vary with the atmospheric environment and the difference can reach a factor of 16. Among the environmental pollution factors, the most detrimental factor is atmospheric sulfur deposition for atmospheric corrosion of carbon steel. Especially, in Chongqing, the high SO_2 levels plus humid and warm climate lead to the most serious atmospheric corrosion of carbon steel.     

利用粮堆微气流熏蒸高大立筒仓储粮害虫的试验

根据粮堆内部微气流的运行方向，在高大立筒仓粮面或仓底施药，可以得到很好的杀虫效果，具有经济、安全、简单、快速的特点。     

氮制冷高温冷藏库气流流速的研究

对苍山冷链物流试验站高温冷藏库内气流分布情况进行了实地测定分析。结果表明,空库与满库货架和货架通道上半部分以及中央通道内气流流速有显著差异,货架与货架通道下半部分气流流速相同。高温库满库后其大部分区域空气流速远不能够达到正常气流流速的要求。建议在果蔬预冷期和正常贮藏期间货堆的空气流速分别控制在0．80～1．00m/s和0-30～0．50m／s之间。     

脱水菊花菜生产工艺研究

根据菊花菜原料特性,对热风干燥脱水工艺中烫漂浸液的pH值、烫漂温度、烘干温度时间组合等工艺中的关键技术进行单一因子对比试验,通过添加碳酸氢钠调整烫漂浸液pH值为9,烫漂温度95℃,烫漂时间2.5min,烘干温度时间组合为75℃(0.5 h)→70℃(2 h)→60℃(2 h)→45℃(2 h).利用脱水工艺制成的菊花菜干品呈黑绿色,具有浓郁的菊花香味,水分含量≤8%,工艺效果较佳.     

浅谈筒仓的熏蒸方法及对筒仓气密性要求

文章介绍了目前对筒仓采用的几种熏蒸方法。对筒仓气密性对熏蒸效果的影响进行了讨论，并提出了对密封的补救建议。