Thermal integration analysis and improved configuration for multiple effect evaporator system based on pinch analysis

REAKTOR ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 74-93
Author(s):  
Indra Riadi ◽  
Zulfan Adi Putra ◽  
Heri Cahyono
Keyword(s):  
Production Capacity ◽  
Energy Utilization ◽  
Wash Water ◽  
Plant Production ◽  
Pinch Analysis ◽  
Multiple Effect ◽  
Pressure Steam ◽  
Sugar Plant ◽  
Energy Consumptions ◽  
Integration Analysis

Pinch analysis for a sugar plant production capacity 4000 TCD has been carried out to reduce its energy consumptions. The plant has ten evaporators that can be configured to several multiple effect evaporators. It has been running with five-effect evaporator (quintuple) scheme. To maximize energy utilization within the plant, three multiple effect evaporator schemes were evaluated. They are triple effect evaporator, quadruple effect evaporator, and quintuple effect evaporator as the benchmark. The result shows that the quintuple effect evaporator yields the highest energy efficiency by about 10%. Options to achieve such target is to use low pressure steam only for the first effect and to use steam bleeding from the first effect to heat a tertiary juice heater. With this proposed scenario, sugar dryer, wash water RVF unit and wash water HGF unit no longer need external steam for its operation.

scholarly journals Resource Utilization Efficiencies in a Closed System with Artificial Lighting during Continuous Lettuce Production

Agronomy ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 723 ◽  
Author(s):  
Katsumi Ohyama ◽  
Junichi Yamaguchi ◽  
Ayumi Enjoji
Keyword(s):  
Environmental Impact ◽  
Production Rate ◽  
Resource Utilization ◽  
Urban Agriculture ◽  
Production Systems ◽  
Energy Utilization ◽  
Utilization Efficiency ◽  
Plant Production ◽  
Artificial Lighting ◽  
Consumption Rates

New plant production systems with a low environmental impact (or a high resource utilization efficiency) are necessary for urban agriculture development. This study explores the benefits of closed plant production systems (CPPSs) with artificial lighting using a commercial CPPS at Osaka Prefecture University. Lettuce plants were produced continuously as a model for analyzing resource consumption rates, such as electricity, labor, water, and CO2, over two years. Monthly consumption rates of electricity, labor, water, and CO2 increased with the increase in the monthly production rate of the lettuce. The utilization efficiencies (=output/input) of electricity, energy, water, and CO2 were 1.0%, 1.0%, 4.0%, and 32.6%, respectively. If the commercial CPPS maintains the monthly production rate at a higher level, the energy utilization efficiency will increase. The number of air exchanges in a commercial CPPS should decrease to increase water and CO2 utilization efficiencies. Reusing water drained from the air conditioning system and employing a closed loop in the nutrient supply system also contribute to increasing the water utilization efficiency and lowering the environmental impact. Although a commercial CPPS still requires further improvements, it may be a good crop production system for urban agriculture provided resource utilization efficiencies improve.

Exergy Analysis of 330MW Thermal Power Unit

2012 ◽  
Vol 246-247 ◽  
pp. 505-508
Author(s):  
Jian Meng Yang ◽  
Wang Wei ◽  
Nian Zhe Qi
Keyword(s):  
Energy Transfer ◽  
Power Plant ◽  
Power Unit ◽  
Thermal Power Plant ◽  
Exergy Analysis ◽  
Thermal Power ◽  
Flow Equation ◽  
Energy Utilization ◽  
Plant Production ◽  
System Energy

This paper took one 330MW unit boiler in one power plant as an example, then doing some research about the boiler system energy change through doing exergy analysis. After this, the exergy flow equation was established, the energy transfer, utilize and loss of the thermal power plant production was revealed, the exergy efficiency of the boiler was defined. So the paper can provide a basis for energy utilization of power plant.

scholarly journals Improve inspection process in tire manufacturing by using computer simulation

2018 ◽  
Vol 192 ◽  
pp. 01048
Author(s):  
Sathitthep Sangthong ◽  
Pattara Woraphu ◽  
Kanokbhorn Arayikanon
Keyword(s):  
Working Condition ◽  
Production Capacity ◽  
Plant Production ◽  
Quality Inspection ◽  
Test Procedures ◽  
Average Production ◽  
Engineering And Technology ◽  
Inspection Process ◽  
Working Groups

The purity of this research was to study the feasibility of improving the quality inspection in the manufacturing of tire by focusing on the utilization process. The current plant production is continuous and there are four working groups which can be divided into 3 shifts with 24 hours produced a day (Average production capacity is 350 days per year). Improved quality inspection processes will inevitably result in unnecessary production stops. Therefore, the researchers have proposed a feasibility study on how to improve the quality of the test procedures using engineering and technology techniques. These create models that have the same functionality as the current working condition. The result was found that Model 2 could reduce unnecessary processes and also four workers per shift if the worker's wage was calculated. This model shows a cost reduction of approximately 1.68 million baht per year, as well as utilization process

Thermal integration of multiple effect evaporator in sugar plant

2009 ◽  
Vol 29 (2-3) ◽  
pp. 515-522 ◽  
Author(s):  
M. Higa ◽  
A.J. Freitas ◽  
A.C. Bannwart ◽  
R.J. Zemp
Keyword(s):  
Multiple Effect ◽  
Sugar Plant ◽  
Thermal Integration

scholarly journals Goals and results in improvement of biological background of medicinal plant production

2001 ◽  
Vol 7 (2) ◽  
Author(s):  
É. Németh
Keyword(s):  
Medicinal Plant ◽  
Plant Species ◽  
Active Material ◽  
Production Capacity ◽  
Papaver Somniferum ◽  
Plant Production ◽  
Medicinal Plant Species ◽  
Medicinal And Aromatic Plants ◽  
Horticultural Crops ◽  
Legal Difficulties

The choice of varieties among medicinal plant species is relatively small, compared to other horticultural crops. In Hungary, only poppy (Papaver somniferum) and mustard (Sinapis alba) have several cultivars. Recognising the problem, in the recent years breeding activity has been intensified all over the world, in spite of financial, technical and legal difficulties. The article reports on the results of breeding at the Department of Medicinal and Aromatic Plants of the Szent István University, 11 varieties of which has been officially registered till 2000. Main goals of genetic improvement are: increasing of the production capacity of utilised plant organs, enhancement of active material accumulation capacity, improvement of sensory quality and technological properties. The most often applied methods are selection, and recently, cross breeding, the results of which can be measured on new materials of caraway (Carum carvi), hyssop (Hyssopus officinalis), marjoram (Majorana hortensis), poppy (Papaver somniferum), etc. Efficacy of breeding work is established by additional, regular research on the genetics, physiology, floral and reproductive biology, chemosyndromes of medicinal plant species.  

scholarly journals Development of Automatic Equipment for Washing and Nondestructive Inspection of Stud Bolt

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
H. S. Kwak
Keyword(s):  
High Pressures ◽  
Nondestructive Inspection ◽  
Operating Conditions ◽  
Energy Utilization ◽  
Steam Turbines ◽  
Cleaning Efficiency ◽  
Automatic Equipment ◽  
Element Analysis ◽  
Pressure Steam ◽  
Screw Threads

Low-pressure steam turbines in a power plant are required to operate at high temperatures and under high pressures to achieve better energy utilization and better performance. Higher operating temperatures accelerate the rate of oxidation and sludge formation, so the steam turbine is periodically inspected including strict examination of the stud bolts, and it is necessary to clean the bolts by removing sludge from their screw threads. In the conventional cleaning process, the sludge has been removed by manual cleaning, which is labor-intensive and time-consuming. Therefore, this study developed automatic equipment for washing and nondestructive inspection of stud bolts using theoretical analysis and finite element analysis (FEA). An optimal clamp load to prevent sliding of the roller was calculated, and a structural analysis of the equipment under operating conditions was conducted. An optimal washing condition to maximize cleaning efficiency was proposed using design of the experiment and verified by performing washing test of prototype.

scholarly journals Results of co-fermentation experiments in half industrial size

2014 ◽  
Vol 3 (2) ◽  
pp. 454-458
Author(s):  
László Sallai
Keyword(s):  
Biogas Production ◽  
Research Work ◽  
Electrical Energy ◽  
Energy Utilization ◽  
Plant Production ◽  
Pig Manure ◽  
Local Conditions ◽  
Agricultural Enterprises ◽  
The Impact ◽  
By Products

The research work presented proposes the study of the impact for the qualitative and the quantitative property of the biogas production by the co-fermentation of the bio-fuel industrial by-products and the dangerous liquid pig manure of the concentrated stock of the big pig farms. The energetic utilization of these materials means more profitable technology for the bio-fuel industry with a longer product course, bigger income for the agricultural enterprises selling the electrical energy, the heat energy, getting support for the demolition of the dangerous materials, savings in the replacement of the plant nutrition with the utilization of the bio-manure, increases the performance of the plant production, making harmless the dung which means a big environmental load. Because of the profitability of bio-energy utilization depends on the local conditions it is necessary to do experiments to try the available composition of organic wastes in the ratio of the formation in advance. We have to investigate the different ways of technology and recipe of basic and by-products to increase the production.

scholarly journals Key Blasting Parameters for Deep-Hole Excavation in an Underground Tunnel of Phosphorite Mine

2019 ◽  
Vol 2019 ◽  
pp. 1-9
Author(s):  
Xiu-wei Chai ◽  
Sha-sha Shi ◽  
Yao-feng Yan ◽  
Jian-guo Li ◽  
Long Zhang
Keyword(s):  
Free Surface ◽  
Production Capacity ◽  
Energy Utilization ◽  
Underground Mines ◽  
Hole Drilling ◽  
Utilization Rate ◽  
Deep Hole ◽  
Comparison Results ◽  
Tunnel Blasting ◽  
Interaction Modeling

Ever increasing mine production capacity and mechanized operations enable advanced drilling equipment to be widely adopted in underground mines. In order to achieve satisfactory blasting performance in tunnel advance, there is a critical need to optimize the blasting technique to match the large deep-hole drilling capability. In this study, through theoretical analysis of tunnel blasting, the layout of cutting holes was found to be the key factor controlling the blasting performance. The deep-hole cutting effect was first investigated by analyzing the influence of the free surface of a hollow hole using the fluid-structure interaction modeling method in ANSYS/LS-DYNA. Then the rock dynamic evolution processes of blasting using a double-cavity grooving and a four-cavity grooving were compared and analyzed towards an understanding of the influence of the spacing and layout of cutting holes on the blasting performance. The comparison results show that four empty hole cut layouts yield larger effective free surface than that of the two empty hole cut layouts. This is because larger compensation space for breaking of rock and expansion of gas is more conducive to improving the energy utilization rate of explosives and thus improving the blasting performance and the footage of cyclic blasting. The results indicated that the blasting performance can be improved by reserving reasonable compensation space in the grooving area.

scholarly journals THE CAP GREENING EFFECTS – THE POLISH EXPERIENCE

2018 ◽  
Author(s):  
Wioletta WRZASZCZ
Keyword(s):  
Agricultural Land ◽  
Arable Land ◽  
Production Capacity ◽  
Plant Production ◽  
Soil Protection ◽  
Organizational Changes ◽  
Legal Rules ◽  
Polish Experience ◽  
Ecological Focus Areas ◽  
Soil Quality Improvement

In 2015 greening requirements were implemented. All farmers entitled to the Single Area Payment are obliged to implement greening, depending on agricultural surface and structure. Presently, 30% of the national financial envelope is connected with greening. Legal rules obliged farmers to more environmental friendly farms` organization. The European Commission regulations indicated the importance of crop diversification in the context of soil quality improvement, the maintenance of permanent grasslands in order to ensure the carbon sequestration, soil protection and biodiversity, as well as the maintenance of ecological focus areas that guarantees biodiversity at the farm level. The aim of the paper is to present the farms` organizational changes and outcomes after the implementation of greening mechanism. Polish FADN data were used for 2014 and 2015, that covered 5.7 thousand farms. The research results indicated the farms` adaptation to greening requirements. The production capacity of the analysed FADN farms did not decrease after the greening mechanism introduction. Farmers combined production objectives with environmental ones, that was the result of farms` proper organization and enlarging agricultural land. The scope of changes introduced in plant production referring to the greening requirements was insignificant and concerned mainly larger farms (with arable land area of 15 ha and more). Farmers introduced the required organizational changes smoothly, mainly by increasing area under leguminous and papilionaceous plants. The environment-friendly farms’ organization before greening introduction facilitated their adaptation in 2015. In the short term, greening doesn’t cause negative productive and economic outcomes. In the longer perspective, greening environmental effects should contribute to factor productivity increase.

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