The improved heat integration of cement production under limited process conditions: A case study for Croatia

2016 ◽  
Vol 105 ◽  
pp. 839-848 ◽  
Author(s):  
Stanislav Boldyryev ◽  
Hrvoje Mikulčić ◽  
Zoran Mohorović ◽  
Milan Vujanović ◽  
Goran Krajačić ◽  
...  
Keyword(s):  
Process Conditions ◽  
Heat Integration ◽  
Cement Production ◽  
Limited Process

Towards Optimal Flow Uniformity: Stiffener Layout Design Evaluation of Injection Moulded Plastic Part

2012 ◽  
Vol 428 ◽  
pp. 33-37
Author(s):  
Yi Min Deng ◽  
Bao Shou Sun ◽  
Hua Bo He ◽  
Fu Zhan Shangguan
Keyword(s):  
Process Conditions ◽  
Flow Uniformity ◽  
Plastic Part ◽  
Moulding Process ◽  
Manufacturing Method ◽  
Part Geometry ◽  
Stiffener Layout ◽  
Plastic Parts ◽  
Stiffener Layout Design

Injection moulding is an important manufacturing method for plastic parts. There are however many moulding quality defects caused by inappropriate setting of moulding process conditions, as well as the poorly designed plastic part geometry. Often, stiffeners are used in a plastic part to increase its strength. However, if the stiffeners are not designed properly, they will introduce one or more moulding quality problems, which in turn will worsen the part strength rather than increasing it. Although there have been quite a lot of researches on optimising moulding quality, it is often difficult to minimize multiple quality defects simultaneously. In this paper, we propose to employ flow uniformity as the optimisation objective to address this problem. A number of stiffener layout designs are evaluated in terms of this objective to determine the best design, where standard deviations of filling times and pressures at the extremities of the plastic part are used to measure the uniformity of flow. A simple case study is also presented to demonstrate the applicability of the proposed methodology.

scholarly journals Studying the Role of System Aggregation in Energy Targeting: A Case Study of a Swedish Oil Refinery

Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 958 ◽  
Author(s):  
Elin Svensson ◽  
Matteo Morandin ◽  
Simon Harvey ◽  
Stavros Papadokonstantakis
Keyword(s):  
Heat Exchange ◽  
Heat Recovery ◽  
Process Integration ◽  
Heat Integration ◽  
Direct Process ◽  
Utility System ◽  
Process Heat ◽  
Definition Of

The definition of appropriate energy targets for large industrial processes is a difficult task since operability, safety and plant layout aspects represent important limitations to direct process integration. The role of heat exchange limitations in the definition of appropriate energy targets for large process sites was studied in this work. A computational framework was used which allows to estimate the optimal distribution of process stream heat loads in different subsystems and to select and size a site wide utility system. A complex Swedish refinery site is used as a case study. Various system aggregations, representing different patterns of heat exchange limitations between process units and utility configurations were explored to identify trade-offs and bottlenecks for energy saving opportunities. The results show that in spite of the aforementioned limitations direct heat integration still plays a significant role for the refinery energy efficiency. For example, the targeted hot utility demand is reduced by 50–65% by allowing process-to-process heat exchange within process units even when a steam utility system is available for indirect heat recovery. Furthermore, it was found that direct process heat integration is motivated primarily at process unit level, since the heat savings that can be achieved by allowing direct heat recovery between adjacent process units (25–42%) are in the same range as those that can be obtained by combining unit process-to-process integration with site-wide indirect heat recovery via the steam system (27–42%).

Method for Hazard Analysis of Chemical Process Equipment Taking Domino Effect into Account

2013 ◽  
Vol 321-324 ◽  
pp. 2456-2459
Author(s):  
Ming Liang Chen ◽  
Zhi Qiang Geng ◽  
Qun Xiong Zhu
Keyword(s):  
Chemical Process ◽  
Hazard Analysis ◽  
Process Industry ◽  
Process Equipment ◽  
Process Conditions ◽  
Domino Effect ◽  
Effect Analysis ◽  
Chemical Process Industry ◽  
Chemical Process Equipment

The hazard of chemical process equipment consists of two parts: the inherent hazard of process equipment and the hazard from domino effect among equipments. The inherent hazard of equipment depends on the properties of the substance present in the equipment and the specific process conditions. The domino effect is responsibility for many most destructive accidents in the chemical process industry. However, domino effect is either not considered at all or is done with much less rigour than is warranted. A method was proposed to evaluate the hazard of chemical process equipment. The inherent hazard and the hazard from domino effect were considered in the method. The procedure for the domino effect analysis among equipments was presented to evaluate the hazard from the domino effect. The method was implemented in a case study. The results show that it can be used to select the process equipment which should be intensive monitored.

Heat Integration retrofit analysis—an oil refinery case study by Retrofit Tracing Grid Diagram

2015 ◽  
Vol 9 (2) ◽  
pp. 163-182 ◽  
Author(s):  
Andreja Nemet ◽  
Jiří Jaromír Klemeš ◽  
Petar Sabev Varbanov ◽  
Valter Mantelli
Keyword(s):  
Oil Refinery ◽  
Heat Integration

Case Study of Aeration Performance under Changing Process Conditions

2002 ◽  
Vol 128 (6) ◽  
pp. 562-569 ◽  
Author(s):  
R. Iranpour ◽  
Y. J. Shao ◽  
B. K. Ahring ◽  
M. K. Stenstrom
Keyword(s):  
Process Conditions ◽  
Aeration Performance ◽  
Changing Process

Approaches for sustainable cement production – A case study from Turkey

2013 ◽  
Vol 66 ◽  
pp. 136-142 ◽  
Author(s):  
Ozgur Ekincioglu ◽  
Asli Pelin Gurgun ◽  
Yasin Engin ◽  
Muhittin Tarhan ◽  
Sezgi Kumbaracibasi
Keyword(s):  
Cement Production

Debottlenecking through Heat Integration (Case study: Crude Distillation Unit)

2010 ◽  
Author(s):  
Ahmed Aseeri ◽  
Shahid Amin ◽  
Mahmoud Ibrahim
Keyword(s):  
Distillation Unit ◽  
Heat Integration

scholarly journals Dispersion modelling of carbon monoxide and total suspended particulate emission from cement stacks: case study of PT. Semen Tonasa in Indonesia

2018 ◽  
Vol 4 (11) ◽  
pp. 266
Author(s):  
Fajar Septian Anwar ◽  
Anwar Mallongi ◽  
Alimin Maidin
Keyword(s):  
Carbon Monoxide ◽  
Industrial Area ◽  
Total Suspended Particulate ◽  
Particulate Emission ◽  
Cement Production ◽  
South Sulawesi ◽  
Suspended Particulate ◽  
Descriptive Approach ◽  
Dominant Direction

<p class="abstract"><strong>Background:</strong> Industrial activities in the cement production process produce emissions in the form of carbon monoxide (CO) and total suspended particulate (TSP) which have potential to cause environmental pollution in settlements around the industrial area. This study aimed to estimate the distribution emissions of CO and TSP concentrations at six settlements location around PT. Semen Tonasa of Pangkep Regency in a year.</p><p class="abstract"><strong>Methods:</strong> This observasional study was conducted by using descriptive approach. This study was conducted on May–June 2018. Meterological data used for this study were air temperature, solar radiation, wind direction, and wind speed in 2014–2017 collected from Maros Climatology Station and data about seven main stack characteristics in 2014–2017 were collected from environmental services of South Sulawesi Province.  </p><p class="abstract"><strong>Results:</strong> The highest CO and TSP concentrations predicted in each location were respectively, 17.02 μg/m<sup>3</sup> and 6.56 μg/m<sup>3</sup> at Bontoa, 27.52 μg/m<sup>3</sup> and 10.4 μg/m<sup>3</sup> at Taraweang, 443.65 μg/m<sup>3</sup> and 148.41 μg/m<sup>3</sup> at Masjid Taqwa, 22.21 μg/m<sup>3</sup> and 3.1 μg/m<sup>3</sup> at Biringere, 1.17 μg/m<sup>3</sup> and 1.36 μg/m<sup>3</sup> at Kampung Sela, 19.07 μg/m<sup>3</sup> and at 15.54 μg/m<sup>3</sup> at Mangilu.</p><p class="abstract"><strong>Conclusions:</strong> The dominant direction of CO and TSP dispersion was from the west. The highest concentrations were predicted at Masjid Taqwa in the most month. Maximum CO and TSP concentrations were not higher than the local regulation. Thus, it can be concluded that CO and TSP emissions from the cement plant have no impact on health in nearby communities.</p>

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