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Online since: January 2023
Authors: Wan Nurmi Syazwina Wan Azmi, Mohd Rizuan Mohd Razlan, Najmiddin Yaakob, Adli Md Noor, Husna Hayati Jarni
Water condensation occurs due to a significant variance in temperature outside the pipeline and inside the pipeline as water condenses in the inner pipeline.
Many papers have highlighted the water condensation rate toward corrosion, but the effect of the water condensation rate in the presence of gas condensate is still unknown.
The water condensation rate is measured by the volume of condensed water produced from the experiment and the time duration of the condensed water from both top coupons that accumulate in the collector as shown in Equation 1.
Speight (Ed.), Gulf Professional Publishing, Boston, 2019: pp. 325–358. https://doi.org/10.1016/B978-0-12-809570-6.00009-6
Speight (Ed.), Gulf Professional Publishing, Boston, 2019: pp. 99–148. https://doi.org/10.1016/B978-0-12-809570-6.00004-7
Online since: July 2011
Authors: Zi Ming Kou, Hong Wei Yan, Juan Wu, Xian Hui Wang
It is applicable to the sealing of the heat, water supply, the chemical pipeline, and even large pipe leakages.
These two types of devices are easy to carry, require low professional training, while are highly efficient for the fast closure of the pipeline leakages.
The above for existing different pipe leakage different sealing equipment and sealing method, actual use relatively inconvenience, the scope of comparative limitations, the operation is more complex, cannot fast effective sealing zone, and still time-consuming, plugging the effect not beautiful, to operating personnel have higher professional requirements.
It can also be used for the rescue sealing for gas, heat, and water pipes; l It is reusable, thereby saving material and energy, making a great environmental improvement.
It is easy to carry, require low professional training, while are highly efficient for the fast closure of the pipeline leakages.
Online since: May 2012
Authors: Bai Yan Gong, Zuo Jun Bao, Yu Hong Lu
There are 210 parameters included in 19 items in Grade Standards for Test & Detection Organization of Road and Water Transport Engineering of Ministry of Transport.
Generally, a set of standardized description model should be established to express the professional character, such as text, data.
Only the professional and systematic information carrier could ensure that the quality property of the described objects is simply and correctly understood.
Area D Area A Area C Area E Area B (unique identification) ×××× Test & Detection Report Name of site laboratory: Construction/commission unit Commission number Project name Sample number Project parts/uses Sample description Testing standard Determining standard Main equipments and their number Detecting conclusion: Area F Remark: Testing personnel: Audit: Signing officer: Time: Fig.2: The typical test & detection data report format References [1] Grade Standards for Test & Detection Organization of Road and Water Transport Engineering[S]
Online since: August 2014
Authors: Hao Yang Du, Zhen An Ren, Yong Zhao
Hazard Evaluation of Carbon Steel Water Tube Boiler under Explosion Behavior Haoyang Du1,2,a, Yong Zhao 3,b, Zhen’an Ren 1,c 1 College of Materials Science and Engineering, Jilin University, Changchun, 130022 China 2 Electric Power Research Institute of Jilin Electric Power Co.
Foreword Carbon steel is widely used in hot water boiler parts such as shell and tubes.
Boiler explosion The basic parameters of the exploded vertical water tube boiler are as follows: rated power 0.5T/h, working pressure 0.4MPa, steam temperature is 152℃, working media is water and steam.
Safety valves, pressure gauges and water level gauge are damaged, no effective data could be obtained.
Conclusions (1)Physical explosion model in safety evaluation theory is an effective methods to evaluated the water tube boiler pressure before explosion
Online since: May 2014
Authors: Hao Wang, Hong Tang
What is more, division of labor in the green building construction is not professional.
However, energy companies can provide a more professional support for energy-efficient equipment running and maintaining.
However, due to its technical professional, standards of energy efficiency design will be greatly improved.
Therefore the truly viable way is to introduce professional third party who is more familiar with EMC.
Hence, pricing mechanism of resources such as water, electricity, oil and natural gas should be rationalized.
Online since: December 2012
Authors: Ching I Wu, Pi Fen Wang
A river is a water container.
The functions of water, drainage, and ecological conservation are under serious consideration because of increasing global water issues.
Rivers and water resources are characterized by social and public financing.
River ecological assessment methods are summarized into five categories. 1.Water quality indicators methods: The first category is the Water Quality Indicator method, which includes River Pollution Index, Water Quality Index, and Water Hydrology Evaluation Indicators.
Questionnaires and experts consultation effectively establishes the objective professional indicator system.
Online since: February 2014
Authors: Hua Liu, Qing Qing Ma
Coal gangue as road engineering material can sovle the problems of energy saving and environmental protection.Experimental datas of grain size distribution,crushing value,slake durability index,expansivity,liquid limit index,plastic limit index and water absorption showed that its own characteristics are in line with the requirements of road engineering materials.
environmental social benefits.[6] Material properties Road materia experiments were conducted on coal gangue which piled up the life of 10 years, the data obtained are as follows(The following values for the mean test multiple samples,see Table1): Table1 Coal gangue various properties and numerical data Material properties Obtained numerical data Description Density 2.44 g/cm3 Grain size distribution Well graded particles Easy to obtain large density, with low compressibility and high strength Crushing value 29.1% <30%, indicated that’s easy to be crushed, after rolling surface is smooth and dense Slake durability index 96.25% Index is higher, the resistance of softening and disintegration is better Expansivity Particles below 0.5mm 18% All are less than 40%,showed that it is non expansive Particles below 5mm 27% Particles above 5mm 32.1% original sample 26% Liquid limit index 31.06% <50%,meet the requirements Plastic limit index 22.92% <26%,meet the requirements Water
absorption 3.1% Water absorption rate is lower, showed that the structure of coal gangue is compact, water permeability is better and its capacity of water holding is lower The numerical data above show that coal gangue can be used as road engineering materials.
(see Table2 ) Questionnaire survey combines with software SPSS elicited 4 major influencing factors from following 22 general factors, specifically as follows: - Government support (including C8,C9,C10,C11); - Research, development and promotion of technology (including C4,C5,C6,C7,C17,C18,C19); - Quality of professionals (including C12,C13); - The level of supply and demand (including C1,C2,C3,C14,C15,C16,C20,C21,C22).
However, the efflorescence of coal gangue would be result in a lot of powder and the improper handle and stack would be cause heavy metal pollution of the soil and ground water.
Online since: July 2024
Authors: Waleed Ahmed Khan, Zarak Khan, Ayyaz Khan Bazai, Nisar Ahmed, Hafiz M. Adil, Shahzada M. Karim, Muhammad Salman Nazar
Water and power supply shortages emerged as significant management-related factors, while poor site layout and rework were prominent site-related influencers.
Job Title in The Construction Sector Respondents have a crucial role because of various positions in their organizations with different professional expertise and working levels.
Opinions from professionals with diverse backgrounds and skills helped formulate a balanced conclusion.
The leading factor is a shortage of water and power supply [1st rank, average mean: 3.31], followed by the lack of required construction material [2nd rank, average mean: 2.29].
In the USA, factors include the lack of required construction materials, power and water supply shortages, accidents, and a shortage of necessary tools and equipment.
Online since: April 2013
Authors: Wei Zhen Wang, Bing Shao, Li Zhen Wang, Nan Wu, Gui Ying Zhang
The common sportswear and simple equipment have failed to meet the requirements of rapid development of outdoor sports, and outdoor sporters need those outdoor clothing and equipments which are more safe, comfortable, convenient and professional[2].
The fabric selected for this design was the latest product of Core-Tex known as “the cloth of world” in Europe and America (as shown in Fig. 1), which is most durable, breathable, waterproof and windproof, and can meet the needs of professional outdoor sporters and expedition fans.
The pore of Core-Tex film is much smaller than water drop and bigger than water vapor molecule, can prevent rainwater seepage and permeate sweat, thus make the wearer comfortable.
There are two waterproof methods for seams: applying adhesive tapes to seams, gluing fabric with fabric, that is, professional seam sealing machine and adhesive tapes are used for high-temperature adhesive sealing and gluing at seams (as shown in Fig. 3), so as to seal all seams, prevent water leakage and seepage and cope with complex outdoor conditions[7].
Online since: October 2013
Authors: Li Dong, Yu Zhang
The landscape is designed based on the existing condition of geography , plant, water, soil and habitat of this site , which could preserve the original texture , landform and ecological environment , and reduce the design expenditures.The construction of Beijing Nanhaizi Park takes advantage of the construction demolition waste , the rubble and the cement walls shattered and sorted according to various specifications , to heap mountains , construct the park roadbed and pave the garden roads with the mixture of the soil , the domestic garbage , the grass and wood , aiming to increase soil fertility.
For instance, in North America, Low Impact Development(LID) stressed at the beginning of the development is to consider how to keep the whole chain of natural circulation not be destroyed and interrupted. [3] Through small, easy to build and maintain low cost facilities realize a variety of functions such as non-point source pollution control, flood peak reduction and maintain landscape ecology and soil and water conservation.
For example, WuZhiQiao Charitable Foundation is a registered charity in Hong Kong, aiming to provide financial and technical support to university students, professionals and community volunteers to use of sustainable building concepts working together and build bridges.
Under the professional management, the annual maintenance cost is 20% of the original set price.
It changes a typical vegetable garden into a beautiful place for people to have breks by its beautiful modeling and distinctive images.[5] (Fig. 4) (Fig.4 Types of Economic Crop Roof Garden in Gary Comer Youth Center) Low Emissions - Reduce The Impact On Natural Environment By Landscape Landscape Materials Pollution Reduction "Construction safety production management regulations" states that construction units should comply with the environmental protection laws and regulations to prevent or reduce dust, waste gas, waste water, solid waste, noise, vibration and construction lighting and environmental hazards and pollution [6]. 
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