A mathematical model was developed to investigate mass flow rates in the heat transfer pipes of the air side heat exchanger with and without distribution pipes for an air source heat pump.
建立分液管和换热器的数学模型，对空气源热泵风侧换热器在有、无分液管的情况下的各盘管中质量流量分配问题分别进行研究。
The infrastructure is not intelligent: roads, power grids and water-distribution systems are all essentially networks of dumb pipes.
基础设施未智能化：道路、电网及配水系统基本都是哑管道网络。
The solution pumps hot water from a power plant through underground pipes to heat exchangers which heat up water in the secondary distribution network and feed it into consumer radiator systems.
该解决方案把热水从发电厂抽上来，通过地下管道至热交换器，热交换器在二级分配网络上将水加热，然后将它流入用户的散热器系统。
It also discussed the diameter selection and flow distribution of the parallel conduits concerned in solving the model, and derived a formula for the distance between link pipes.
对模型求解中涉及到的并联输水管管径的选定和流量分配问题作了探讨，推导了连接管设置间距计算式。
Plumbers install, repair and maintain pipes, fixtures and other plumbing equipment used for water distribution and waste water disposal in residential, commercial and industrial buildings.
管道工安装，维修和保养管道，装置和用于住宅，商业和工业建筑的配水和废水处理等水暖器材。
The paper investigated the flow distribution of solid phase and the respective resistance properties of branch pipes when both conveying velocity and the flow valve opening of branch pipe are changed.
通过试验，当输送气速和分支管路流量控制阀开度变化时，对分支管路各自的阻力特性和固相颗粒在各分支管路中的流量分配特性进行了研究。
This method is able to correctly describe the flow distribution of pipes and pressure of each node.
采用该管网计算方法，可以较准确地描述船舶管路系统中流量分布、压力的变化情况。
Based on these, our pipes are designed to be healthy for pure water distribution.
基于这些，我们管的目的是健康的纯净水分配。
Theoretical model for the calculation of multi-lager hollow cylinder is proposed for the application to concrete pipes. Imitial stress distribution is Calculted on the basis of linear clastic theory.
针对其在自应力管中的应用，提出多层中空圆柱理论计算模型，按弹性理论计算出自应力管初始应力分布规律。
Heating cable length should be piping distribution side of the material in the cable at the cooling condensation unaccompanied heat, heat tracing cable length should be longer than the heating pipes.
伴热电缆应按管道长度分布，一面物料在无伴热电缆处降温凝结，伴热电缆的长度应长于被伴热管道。
By using compressed air as conveyance power and millet as a transport medium in horizontal Y-shaped branch pipes, the solid flow distribution characteristics of the above pipes were studied.
以压缩空气为输送介质，粒径相同而密度不同的小米和空心玻璃珠为输送物料，在水平变角度Y型分支管气力输送试验台上对气固两相的流量分配特性进行了研究。
The present invention can realize large flow rate distribution to parallel pipes in collector with small system resistance loss and by means of simple structure.
本发明可以实现集箱对并联管组大的流量分配需求，系统阻力损失较小，结构和制造工艺简单。
Graphite cast iron pipes and steel pipes are used for the water supply and distribution pipe network.
输配水管网采用了球墨铸铁管和钢管。
Meanwhile the pipe is also matched with tee joint for gas distribution and elbow pipes as well as steel clamps, which have been proven for 20 - year use.
还配套生产了三通导气管、弯头导气管和钢钉管道固定夹。理想寿命20年。
Meanwhile the pipe is also matched with tee joint for gas distribution and elbow pipes as well as steel clamps, which have been proven for 20 - year use.
还配套生产了三通导气管、弯头导气管和钢钉管道固定夹。理想寿命20年。
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