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Numerical simulation of temperature field of soil around the horizontal ground pipe;2. The paper presents a new technique of producing methane with solar heating in cold area,develops the experiment system for producing methane with solar heating,studies the heat-transfer content、temperature difference of heat interchanger and temperature field of soil around the digester fermenting,gives the value of heat .

为解决北方地区由于冬季气温、地温低，沼气生产存在产气率低、使用率低、原料分解率低、沼气使用综合效益差等问题，文章介绍了一种利用太阳能加热制取沼气的方法，建立了太阳能加热制取沼气的试验系统，研究了换热器的加热量、进出口温差以及沼气池周围土壤温度场的变化情况，并给出了换热器的传热系数。

The paper presents a new technique of producing methane with solar heating in cold area,develops the experiment system for producing methane with solar heating,studies the heat-transfer content、temperature difference of heat interchanger and temperature field of soil around the digester fermenting,gives the value of heat .

为解决北方地区由于冬季气温、地温低，沼气生产存在产气率低、使用率低、原料分解率低、沼气使用综合效益差等问题，文章介绍了一种利用太阳能加热制取沼气的方法，建立了太阳能加热制取沼气的试验系统，研究了换热器的加热量、进出口温差以及沼气池周围土壤温度场的变化情况，并给出了换热器的传热系数。

I type heat interchanger companies, the main type of products sales in the Northeast heat units, north and northwest and eastern China, I Sondex type production companies in the industrial heat interchanger typical project are : West chemical synthetic ammonia project, Daqing methanol plant methanol craft projects, the Mid-Levels Hangzhou cycle power plant cooling water projects, Urumqi Petrochemical Corporation Sanjuqingan project, Inner Mongolia Beijing Lung generating limited liability company closed cycle cooling water projects, Linhe plant except quarrel water coolers projects.

随着公司的迅速发展，目前已经聚集并形成一支高素质成熟的专业技术研发、设计队伍；同时拥有一支由国内知名专家组成的专家组；形成了一支熟练的生产操作和产品制造工人队伍和可以提供各种良好售后服务和技术支持的强大销售队伍。公司现已建立起贯穿全国纵横交错的销售网络。公司在东北的沈阳、哈尔滨，华北的北京、天津，华东的上海、南京、杭州、合肥，西北的乌鲁木齐、西安，西南的重庆，华南的广州等城市均设有销售分公司、销售服务办事处。销售代理商已遍布国内20余座大中城市。

For a soil or rock of water - lacked , a heat transfer theoretical model is developed , which is a steady or unsteady , the results show that reservoir temperature , thermal diffusion coefficient , inlet temperature , flow rate of and run time of ground source heat pumps have an effect directly on heat transfer process of dhe . it can deduce that intermit running is favorable for this type of soils and rocks

对于贫含水地下岩土层建立了稳态与非稳态传热的理论模型，分析结果表明，岩土层的热储温度、导温系数、埋地换热器进水温度、流量以及地源热泵系统的运行时间或开停机比，都对埋地换热器的传热过程产生直接影响，可以推断，对于该类型岩土层的地源热泵系统，采用间歇运行将是有利的。

Indices~ mP 0 and 1 were fitted, respectively, with the heat of formation,ionic hydration energy, lattice energy ,internuclear distance bond lengthof 20 kinds of alkali halides; with the lattice energy of 20 kinds of alkali-earth metal halides,with the ionic hydration heat of 51 kinds of metals, and with the ionic standard heat of formation of 80 kinds of i.

用mP的0和1阶指数分别与20种碱金属卤化物的生成焓ΔfH m、离子水化能ΔhG m、晶格能U1、气态碱金属卤化物核间距R0，20种碱土金属卤化物的晶格能U2，51种金属离子水合焓ΔhH m关联，拟合的回归方程的相关系数为m和80种离子标准生成焓ΔfH 0.9753(0.9834)、0.9761(0.9816)、0.9964(0.9986)、0.9967(0.9967)、0.9789(0.9890)、0.9901和0.9805，满足优级或良级标准。

The results showed that the fracture toughness of the weld of HFW pipe was lowest.The value of absorbed energy of HFW weld was closely related to the heat treatment process.But the fracture toughness of fusion zone of submerged-arc welded jointer,its microstructure was coarse granular bainite,and was lower than the other locations of heat affected zone;and with the increasing of steel strength,the effect of welding heat cycles on the pipeline steel became stronger,and form coarse microstructure in fusion zone leading to decrease fracture toughness.

结果表明，高钢级管线钢高频焊接焊缝处的断裂韧性最低，其冲击功大小与热处理工艺密切相关；而埋弧焊接热影响区断裂韧性在熔合线处最低，其主要原因是此处的组织为粗大的粒状贝氏体，而且强度越高焊接热循环对管线钢的作用越强，在熔合线附近更容易产生粗大组织，使断裂韧性降低。

Transfers the bottom type resistance furnace structure outer covering becomes by the steel plate and the section welding, the furnace body welds the system full circle densely by the steel plate, lower part the spatial installment has the turntable support, the kingbolt, on the furnace body foot ledgerwall the installment has the velocity modulation electrical machinery and the transmission gearbox, through the umbrella type gear and the main axle connection, transfers the bottom type resistance furnace's stove village material to use fan-shaped ultra light quality high strength 0.6g/cm3 to conserveenergy the fireproof heat preservation brick, the heat insulating layer uses the aluminum silicate textile fiber felt and the inflation heat preservation powder, the resistance silk thread becomes spiral-shaped, installs according to the average temperature rule in the resistance wire trough, the basealso arranges the resistance wire in the special-purpose trough, in such stove the temperature is even, the work piece and the turntable cannot bump with the resistance wire, resistance wireThe service life is long, is not easy to damage.

转底式电阻炉结构外壳由钢板和型钢焊接而成，炉体由钢板密焊制成圆型，下部空间安装有转盘支撑，旋转主轴，炉体最下部底板上安装有调速电机和变速器，通过伞型齿轮与主轴连接，转底式电阻炉的炉村材料采用扇形超轻质高强度0.6g/cm3节能耐火保温砖，保温层采用硅酸铝纤维毡和膨胀保温粉，电阻丝线成螺旋状，按均温规律安装在电阻丝槽内，底部也布置电阻丝在专用槽内，这样炉内温度均匀，工件及转盘不会与电阻丝相碰，电阻丝使用寿命长，不易损坏。

Transfers the bottom type resistance furnace structure outer covering becomes by the steel plate and the section welding, the furnace body welds the system full circle densely by the steel plate, lower part the spatial installment has the turntable support, the kingbolt, on the furnace body foot ledger wall the installment has the velocity modulation electrical machinery and the transmission gearbox, through the umbrella type gear and the main axle connection, transfers the bottom type resistance furnace's stove village material to use fan-shaped ultra light quality high strength 0.6g/cm3 to conserve energy the fireproof heat preservation brick, the heat insulating layer uses the aluminum silicate textile fiber felt and the inflation heat preservation powder, the resistance silk thread becomes spiral-shaped, installs according to the average temperature rule in the resistance wire trough, the base also arranges the resistance wire in the special-purpose trough, in such stove the temperature is even, the work piece and the turntable cannot bump with the resistance wire, resistance wireThe service life is long, is not easy to damage.

转底式电阻炉结构外壳由钢板和型钢焊接而成，炉体由钢板密焊制成圆型，下部空间安装有转盘支撑，旋转主轴，炉体最下部底板上安装有调速电机和变速器，通过伞型齿轮与主轴连接，转底式电阻炉的炉村材料采用扇形超轻质高强度0.6g/cm3节能耐火保温砖，保温层采用硅酸铝纤维毡和膨胀保温粉，电阻丝线成螺旋状，按均温规律安装在电阻丝槽内，底部也布置电阻丝在专用槽内，这样炉内温度均匀，工件及转盘不会与电阻丝相碰，电阻丝使用寿命长，不易损坏。

Sensible heat efficiency and latent heat efficiency are two critical evaluating indicators of total heat exchanger.

全热交换器的重要评价指标是显热效率和潜热效率。

The boundary conditions and the latent heat of heat transfer system have been treated by heat-enthalpy method.

在这样的充填条件下，虽然金属压铸模的导热性很高，蓄热能力很强，但要求在压铸模型腔内获得形状完整、轮廓清晰、尺寸精度高的铸件，必须得选用合理的模具结构和压铸工艺，而压铸模具的尺寸精度和使用寿命在很大程度上取决于其在压铸过程中热应力和其产生的变形。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。