Research Trend on Water Tank Automation

Peng Cheng,Garima Nautiyal 사단법인 미래융합기술연구학회 2017 아시아태평양융합연구교류논문지 Vol.3 No.4

his paper aims to present a new concept of automatic tank filling system. A typical household water tank uses a ball mechanism to control the filling of water in the tank. The process is not automatic as the motor used has to be operated manually. The automatic systems uses costly electronic sensors. The new concept which is being presented is without the use of any electronic component. The idea behind the water tank automation is that as soon the water level goes down at 10%, the motor automatically switches on and as soon the water level reaches to 90% of the total height, the motor automatically switches off. This process is controlled and automated using a programmable logic controller (PLC) through a ladder logic. Water tank automation will aid in an increased energy saving. This paper aims to present a new concept of automatic tank filling system. A typical household water tank uses a ball mechanism to control the filling of water in the tank. The process is not automatic as the motor used has to be operated manually. The automatic systems uses costly electronic sensors. The new concept which is being presented is without the use of any electronic component. The idea behind the water tank automation is that as soon the water level goes down at 10%, the motor automatically switches on and as soon the water level reaches to 90% of the total height, the motor automatically switches off. This process is controlled and automated using a programmable logic controller (PLC) through a ladder logic. Water tank automation will aid in an increased energy saving.

Heavy metal removal from aqueous solution by granular hydrated Portland cement

Peng Cheng,Yongxiang Ren,Lei Yang,Rituan Li,Xue Wang,Bin Li,Honglin Yuan 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.12

Granular hydrated Portland cement (HPC) was prepared as adsorbent to remove heavy metals in aqueoussolution. Batch experiment results confirmed that heavy metals were removed through a combination of adsorptionand precipitation. Adsorption played a more important role in the initial stage of the removal process or at lower concentrationsof the heavy metals. After adsorption equilibrium was obtained in two days, the removal process continuedfor about three days due to the precipitation. Besides precipitation, the maximum Langmuir adsorption capacity reached132.27, 87.14, 123.43 and 112.05mg/g for Pb, Cu, Zn, and Cd, respectively. When various heavy metals coexisted, theremoval capacity followed the order of Cu>Pb>Cd>Zn. The adsorption on the surfaces of HPC was mainly governedby surface precipitation and Ca2+ exchange, as suggested by XRD, SEM-EDS and released Ca2+ results. Most of theadsorbed heavy metals on the HPC and the precipitation formed in the liquid phase were stable under neutral andalkaline conditions. Overall, HPC particles exhibited a large potential for heavy metal removal. When cement-relatedmaterials containing HPC are employed for heavy metal removal, the dissolution of the precipitate at low pH mightfacilitate the migration of the heavy metals.

CT 이미지 처리를 위한 혼합 분할 기법을 사용한 폐종양 분할 알고리듬에 대한 연구

Peng Cheng,Hun Du,김영철 대한전기학회 2011 정보 및 제어 심포지엄 논문집 Vol.2011 No.4

Numerical and experimental investigation on the global performance of a novel design of a Low Motion FPSO

Peng, Cheng,Mansour, Alaa M.,Wu, Chunfa,Zuccolo, Ricardo,Ji, Chunqun,Greiner, Bill,Sung, Hong Gun Techno-Press 2018 Ocean systems engineering Vol.8 No.4

Floating Production Storage and Offloading (FPSO) units have the advantages of their ability to provide storage and offloading capabilities which are not available in other types of floating production systems. In addition, FPSOs also provide a large deck area and substantial topsides payload capacity. They are in use in a variety of water depths and environments around the world. It is a good solution for offshore oil and gas development in fields where there is lack of an export pipeline system to shore. However due to their inherently high motions in waves, they are limited in the types of risers they can host. The Low Motion FPSO (LM-FPSO) is a novel design that is developed to maintain the advantages of the conventional FPSOs while offering significantly lower motion responses. The LM-FPSO design generally consists of a box-shape hull with large storage capacity, a free-hanging solid ballast tank (SBT) located certain distance below the hull keel, a few groups of tendons arranged to connect the SBT to the hull, a mooring system for station keeping, and a riser system. The addition of SBT to the floater results in a significant increase in heave, roll and pitch natural periods, mainly through the mass and added mass of the SBT, which significantly reduces motions in the wave frequency range. Model tests were performed at the Korea Research Institute of Ships & Ocean Engineering (KRISO) in the fall of 2016. An analytical model of the basin model (MOM) was created in Orcaflex and calibrated against the basin-model. Good agreement is achieved between global performance results from MOM's predictions and basin model measurements. The model test measurements have further verified the superior motion response of LM-FPSO. In this paper, numerical results are presented to demonstrate the comparison and correlation of the MOM results with model test measurements. The verification of the superior motion response through model test measurements is also presented in this paper.

Mean Shift 알고리즘을 이용한 영상 기반 화재 감시 알고리즘에 대한 연구

Peng Cheng,김영철 대한전기학회 2011 정보 및 제어 심포지엄 논문집 Vol.2011 No.10

Erdheim-Chester Disease with Emperipolesis: A Unique Case Involving the Heart

Pengcheng Zhu,Naping Li,Lu Yu,Mariajose Navia Miranda,Guoping Wang,Yaqi Duan 대한암학회 2017 Cancer Research and Treatment Vol.49 No.2

Histiocytosis is an uncommon disease characterized by excessive accumulation of histiocytes. Here, we report a rare case of non-Langerhans-cell histiocytosis in a 51- year-old woman who presented with severe symptoms of pericardial effusion. Radiologic investigation also detected multiple bone (lower limbs, vertebrae, ribs, and ilium) lesions. Resected pericardium showed abundant mono- or multi-nucleated non-foamy histiocytes (CD68+/CD163+/S-100+/CD1/langerin) in a fibroinflammatory background. The histiocytes demonstrated emperipolesis of lymphocytes, a hallmark feature of Rosai-Dorfman disease (RDD). However, molecular analysis revealed a BRAF V600E mutation of the proliferating histiocytes, highlighting the neoplastic features frequently observed in another non-Langerhans-cell histiocytosis known as Erdheim- Chester Disease (ECD). We consider this case to be a unique presentation of ECD harboring some RDD-like cells with emperipolesis, but not a case of RDD with a BRAF mutation concerning its clinical manifestation (involvement of the heart and bones) and neoplastic features.

THE ECONOMIC IMPACTS OF CARBON TRADING MECHANISM ON THE DEVELOPMENT OF PV PROJECTS IN GUANGDONG PROVINCE

Pengcheng XIE,Wenjun WANG,Daiqing ZHAO,Cuiping Liao 한국신재생에너지학회 2017 AFORE Vol.2017 No.11

Study on the Pressure-Volume-Temperature Properties of Polypropylene at Various Cooling and Shear Rates

Pengcheng Xie,Huaguang Yang,Tianze Cai,Zheng Li,Yuelin Li,Weimin Yang 한국고분자학회 2018 폴리머 Vol.42 No.2

To understand the pressure-volume-temperature (PVT) properties of polymer in injection process, a dilatometer with high cooling rate (up to 25 oC/s) and shear rate (up to 320 s-1) was developed. The working pressure and temperature of the dilatometer range from 0 to 100 MPa, and from 30 to 300 oC, respectively. With this instrument, a crystalline polymer polypropylene (PP) was employed to study the effects of cooling rate, shear rate, pressure and their coupling effect on its PVT properties. It was demonstrated that the cooling rate showed a significant effect on the PVT properties. With the increase of cooling rate, the transition temperature of PP from melt state to crystallization decreases gradually and the temperature range of crystallization was also extended. Shear increased the transition temperature of PP from melt state to crystallization. Meanwhile, the initial temperature of shear and crystalline segment was shifted to a higher temperature region with increasing shear duration or shear rate. Above the transition temperature, the effect of shear on the PVT properties weakened gradually with increasing the initial temperature. The coupling analysis of cooling and shear processes showed that increase in cooling rate was enhanced the effect of shear on the transition temperature of PP from melt state to crystallization.

Development of mechanistic cladding rupture model for severe accident analysis and application in PHEBUS FPT3 experiment

Pengcheng Gao,Bin Zhang,Jishen Li,Jianqiang Shan 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.1

Cladding ballooning and rupture are the important phenomena at the early stage of a severe accident. Most severe accident analysis codes determine the cladding rupture based on simple parameter models. In this paper, a FRTMB module was developed using the thermal-mechanical model to analyze the fuel mechanical behavior. The purpose is to judge the cladding rupture with the severe accident analysis code. The FRTMB module was integrated into the self-developed severe accident analysis code ISAA to simulate the PHEBUS FPT3 experiment. The predicted rupture time and temperature of the cladding were basically consistent with the measured values, which verified the correctness and effectiveness of the FRTMB module. The results showed that the rising of gas pressure in the fuel rod and high temperature led to cladding ballooning. Consequently, the cladding hoop strain exceeded the strain limit, and the cladding burst. The developed FRTMB module can be applied not only to rod-type fuel, but also to plate-type fuel and other types of reactor fuel rods. Moreover, the FRTMB module can improve the channel blockage model of ISAA code and make contributions to analyzing the effect of clad ballooning on transient and subsequent parts of core degradation.

Effect of Compositions on the Microstructure and Properties of Plasma Clad NiAl Coating

Pengcheng Xia,Guanpeng Han,Kun Xie 대한금속·재료학회 2016 METALS AND MATERIALS International Vol.22 No.3

NiAl intermetallic coating was in-situ synthesized by the plasma cladding process. The effect of atomic ratio of Ni to Al atoms 1 (coating 1), 2 (coating 2) and 3 (coating 3) on the microstructure and mechanical properties of plasma clad was studied by combining microstructural analysis and wear-resistant test. The obtained results indicated that the microstructure of the synthesized NiAl coating was compact and uniform in addition to few porosities and the NiAl coating well metallurgically bonded with the substrate. Coating 1 is mainly composed of NiAl and the solid solution γ-(Fe,Ni) phases. Coating 2 contains of NiAl, Ni3Al and γ-(Fe,Ni). Coating 3 is mainly composed of Ni3Al, γ-(Fe,Ni) and NiAl. Coating 3 has excellent wear-resistance property owing to high hardness and low friction coefficient. Ni3Al phase has great influence on wear-resistance property of coating 3. The main wear mechanism of coating 1 is multi-plastic deformation wear and adhesion wear. Grain abrasion is the main wear mechanism of coating 3. The main wear mechanism of coating 2 is grain abrasion and partly adhesive wear.