高大平房仓谷物冷却试验

通过使用谷物冷却机对粮食进行降温、保持水分的冷却通风试验,分析试验中的不足之处和出现的异常情况,总结经验,得出了高效、节能的谷物冷却方法.     

高大平房仓谷物冷却试验

通过使用谷物冷却机对粮食进行降温、保持水分的冷却通风试验，分析试验中的不足之处和出现的异常情况，总结经验，得出了高效，节能的谷物冷却方法。     

新产品新技术专栏

辽HTJ-系列谷物顺逆流干燥设备由辽宁省海城干燥机厂生产的HTJ-系列谷物顺逆流干燥设备,具有国际水平的干燥工艺,是当今世界上先进的谷物干燥设备,具有产量大,降水多,作业成本低,性能稳定,高效节能,投资少,见效快,操作方便的优点.美国著名农业谷物干燥专家贝克尔·阿克玛教授将该厂生产的顺逆流干燥机评价为中国最新时代的高水分粮“克星”.该机是将欲     

温度、培养基成分和渗透势对新疆雪莲种子萌发的影响

以新疆雪莲为研究对象,探讨了温度、培养基成分和渗透势对其种子萌发的影响,差异显著性分析结果表明:温度、培养基成分和渗透势显著影响新疆雪莲种子的萌发,其中温度对新疆雪莲种子萌发影响极显著(p<0.001),20/10℃变温条件下种子萌发率最高;渗透势和培养基成分对新疆雪莲种子萌发影响显著(p<0.05),种子萌发的最适培养基为1/2 MS0.PEG模拟水分胁迫研究表明:PEG高于-0.9 MPa时,种子不能萌发.回归分析表明:温度和渗透势与新疆雪莲种子萌发率之间显著相关.而培养基成分与其萌发率之间相关不显著.     

新产品新技术专栏

辽HTJ——系列谷物顺逆流干燥设备由辽宁省海城干燥机厂生产的HTJ—系列谷物顺逆流干燥设备,具有国际水平的干燥工艺,是当今世界上先进的谷物干燥设备。具有产量大,降水多,作业成本低,性能稳定,高效节能,投资少,见效快,操作方便的优点。美国著名农业谷物干燥专家贝克尔·阿克玛教授将该厂生产的顺逆流干燥机评价为中国最新时代的高水分粮“克星”。该机是将欲干燥的玉米、小麦、水稻等粮食由     

水分胁迫条件下高粱叶片的渗透调节及其对气孔导度和蒸腾速率的影响

两个抗旱性不同的高粱品种“3197B”和“三尺三”,在水分胁迫条件下,抗旱品种3197B渗透势降低,渗透调节能力较强.正常灌水时,两品种的气孔导度和蒸腾速率均随光照增强而增加,品种间差异不大;水分胁迫条件下,上午3197B气孔导度和蒸腾速率高于三尺三,午后水分胁迫严重时又低于三尺三,但其叶水势和膨压比三尺三高.     

电容式谷物水分测定仪的定标与应用分析

以LDS-1A与LDS-1G谷物水分测定仪为例,用大米样品对电容式谷物水分测定仪进行定标校准,并对其测量准确度与测量重复性进行了研究,结果与标准法相比偏差不大,表明了快速水分测定仪经过正确校正并能规范使用,是可以达到国标规定的谷物水分测定要求的。     

谷物干燥机械化技术

谷物干燥就是降低谷物中的含水量。谷物中水分的排除需要依靠汽化。干燥的过程就是为谷物中水分的汽化创造条件的过程。现有的干燥方式，都是利用一种介质与谷物接触。常用的干燥介质有空气、加热空气、烟道气与空气的混合气。     

谷物热泵就仓干燥过程分析与探讨

利用谷物的传热传质以及干燥速率方程,建立了低温谷物干燥模型,分析了通风量、空气温度以及湿度对谷物干燥过程的影响.模拟了外界空气温度为15℃,湿度为60%RH时,常温通风、加热通风、以及除湿 加热通风三种通风方式对谷物干燥过程影响的情况,并进行了对比.研究表明,10 d稻谷降低2%水分的平均通风量约为30 m3·h-1·t-1,空气含湿量比空气温度对谷物干燥的影响要大,当谷物初始温度和水分含量比较大时,除湿与加热空气结合的效果比单独加热通风的效果要好得多,谷物初始水分含量和温度相对较低时,可以直接通风干燥.建议干燥初期采用除湿与加热相结合或直接加热通风,干燥后期可以直接通风.     

谷物通风系统的设计、设备选择和安装(一)

机械通风是保存储藏谷物市场品质的常用处理方式,它之所以能够在谷物仓库中逐步推广,就是因为采用通风设备处理的谷堆,能够在不移动的情况下,达到保存市场品质的目的。而且谷物的损耗和保管费用也比较低。经过长期实践,人们发现,用机械通风处理谷物,具有五个方面的作用:(1)机械通风能防止和抑制谷堆中霉菌的繁殖和仓储害虫的活动。(2)机械通风能够阻止和消除谷堆内水分迁移现象和降低一定的水分。(3)消除和排散储藏谷物中的气味。(4)采用通风投放熏蒸剂,可以获得比重力法熏蒸更加理想的效果。(5)通风能够在短期内控制高水分粮的品质劣变速度,可作为一项抢救高水分粮的应急措施。     

Green Thought on the Energy Saving of Air Conditioning

This paper points out the problems in air conditioning and the urgent need in energy saving. By observations and analyses, it shows that the idea of making use of natural resources to improve the indoor air may date back to ancient times. This paper also examines the feasibility of taking advantage of dry or wet bulb temperature, solar energy, underground rock etc. to regulate the room temperature. Finally, it concludes that the above mentioned old idea has such characteristics as energy saving, low cost and less pollution. Therefore, it is a good green plan in energy saving air conditioning.     

Analysis of the Temperature Limit of Dynamic Water Intake of Open loop Surface Water Source Heat Pump Systems

Energy consumption of water intake is one of the key factors for energy saving in the application of the open loop surface water heat pump system. An energy efficiency ratio coupling model for open loop surface water source heat pump systems was established on the basis of the energy consumption model for the water intake and the heat pump units. According to energy saving rate and regulation of energy consumption of water intake, dynamic temperature limits of water intake in different water supply temperature of cooling tower and different pump head were proposed so as to find a calculation method of temperature limits of water intake of open loop surface water heat pumps. Moreover, the energy saving rate of surface water source heat pump systems compared with traditional air conditioning systems under various condition was also calculated.     

高温高湿储粮区空调控温储藏应用研究

在平房仓和立筒仓开展空调控温储藏试验,结果表明:相同的空调运行条件下,平房仓内空调对稻谷仓仓温及表层粮温的控温效果优于玉米仓;立筒仓粮堆底层和表层的温度变化幅度都比较大,在夏季高温季节开启空调,对表层粮温的控制效果明显,可延缓其变化幅度和降低温度值;空调温度的设置应根据气温和粮情的变化适时做出调整,在达到控温目标的同时实现节能降耗。     

高大平房仓空调室外机加装遮阳网节能改造

在高大平房仓空调室外机上加装遮阳系统,使太阳直射空调外机的热量和周围空气温度变低。通过试验发现,遮阳网可有效降低空调外机耗电量,从而节约吨粮保管费用,是一种可行的仓房节能措施。     

循环水养殖系统水净化装备技术研究

循环水养殖系统为当前水产养殖先进生产力的发展方向,其具养殖水环境高度可控、产品质量安全可靠、节水、节地等特点,符合国家转变经济增长方式,节能减排的战略需求。循环水养殖水净化装备是循环水养殖系统核心组成。其为循环水养殖生产中的水产养殖对象提供良好水生态环境,提高水产养殖品产量及质量,提升资源利用率。本文以循环水养殖系统水净化典型工艺为主线,对其主要环节包括悬浮物去除、溶解性有机物降解、杀菌消毒、增氧、调温等所涉及的装备技术进行探讨及总结,并提出发展建议,以期为精准、高效、节能循环水养殖系统构建,推进其进一步应用提供支持。     

The determination method of limit energy consumption of water supply in open-loop surface water source heatpump systems

For the open-loop surface water source heat pump systems, energy consumption of water supply is the key factor for energy saving of system. On the basis of energy consumption model of heat pump unit and energy consumption model of water supply etc., open-loop surface water source heat pump system energy efficiency ratio coupling model is established. Based on energy efficiency ratio,the coupling limit value of surface water source heat pump system in different temperature of water supply and different energy consumption of water supply is obtained.Through the actual case, energy saving rate of the system is calculated in different temperatures of water supply and different system modes. And the determination method of the limit energy consumption of water supply of open-loop surface water source heatpump systems is established.     

Experimental Analysis on Duty Ratio Fuzzy Control for Fan-coil Unit

A new type of energy efficiency control method for fan-coil unit is presented. By introducing the conception of duty ratio into electric valve control, the cooling and dehumidifying capacity of fan-coil unit is fully utilized. By means of Mamdani type fuzzy rule and the Method of Functioning-fuzzy-subset Inference, duty ratio of valve and fan speed signal are identified according to deviation and deviation change of room temperature. It is shown that presented method could achieve at least 30% energy saving than traditional control method as well as a preferable room temperature control effect.     

轴流风机在高大平房仓通风降温中的应用研究

利用冬季自然低温进行机械通风降温，初春封仓保冷，夏季实施AlP低剂量熏蒸是我库使用高大平房仓两年多来摸索、总结出的一套适合高大平房仓特点，经济、实用、有效的保粮方法。特别是冬季利用小功率的轴流风机实施高大平房仓通风降温更是具有明显节能效果的科保技术，在2000年度经过单仓可行性试验后，于2001年在所有高大平房仓通风降温工作中推广使用并取得了较好的效果。     

再生稻栽培技术的研究进展

根据已报到的研究材料,综述了中国南方稻区再生稻的研究进展。所有的水稻品种均可获得一定的再生稻产量,常规品种的再生稻产量明显低于杂交水稻的再生稻产量,而三系杂交水稻的再生稻产量又较两系杂交稻的再生稻产量低;留桩高度各地因组合不同和生态条件不同而有一定的差异,一般为10~40 cm;各节间腋芽在温度、光照和水分适宜的条件下均能较好的萌发,施用赤霉素和细胞分裂素均能有效促进腋芽的萌发,并能提高再生芽的成活率;再生稻腋芽萌发及成活的最适温度为24.5~27.0℃,相对湿度为81%~85%,‘汕优63’再生稻结实率≥70%的临界低温指标是：连续5日平均气温≥21℃;头季稻齐穗期剑叶SPAD值、叶片含氮量和群体单位面积的总颖花量3个因子可以用来预测再生稻高产的促芽肥经济施用量;超级杂交稻也可获得较好的再生稻产量。再生稻的栽培技术还可进一步的研究。     

Numerical Computing Method of Conductive Concrete Applied in Construction Heating Engineering

It is worthwhile for saving energy and protecting environment to use conductive concrete as an indoor heating engineering material. Indoor temperature is the key concern of heating system. Based on convection, radiation and Joule effect, a method to calculate temperature of concrete and indoor air was presented. The method did not need to model the air, which simplified the preprocessing. The numerical result agreed with experiment satisfactorily, with a difference of 2.40%, which proved the correctness of the model. Numerical tests of different conditions showed that electrical resistivity with higher potential than power voltage and concrete thickness was the key to increase heating efficiency.