Optimization Approach of Ventilation Systems in Heating, Ventilation, and Air Conditioning for an Underground Building’s Transport

2021 ◽  
Vol 18 (4) ◽  
pp. 1294-1299
Author(s):  
Jen Jacob ◽  
Rohan Senanayake
Keyword(s):  
Air Conditioning ◽  
Low Cost ◽  
Research Work ◽  
Temperature Fields ◽  
Dynamical Analysis ◽  
Optimization Approach ◽  
Design Strategies ◽  
Cfd Modelling ◽  
Optimum Result ◽  
Operating Level

This investigated research work and the final decisions were arrived from the specific dynamical analysis of three different new and innovate underground interchange buildings planned and executing currently at Doha and Al khor situated at Qatar is presented. A supplementary study was carried out for an identical two-tier swapping building technique and the approach and outcome have been reported in this research article. The examination of dissimilar ventilation and air-conditioning stratagems has been done initially. The prime objective is to find the efficient and effectual design to invent and so as to uphold to get an attention of pollutant contaminant and thermal temperatures under the modelled and designed values, by investing very low cost even in the operating level. The systematic CFD modelling of dissimilar stratagems was done and the numerical and simulated results are shown in this work. The same has again merged with a dynamical Computational Fluid Dynamics (CFD) coding to reach the optimum result. This was done with the coordination with buses circulation and with the sources of heat and disbursed pollution. The concluding optimal result succeeded is grounded on a substantial partitioning which is connecting between the island area and berth locale. The efficacy of the multifarious design strategies and probable predictions are presented in the conclusions. In order to manage a fire crisis situation, it is primary to check about the planning of the fire and flames struggling measures which comprises of automatic freshening like ventilation along with arrangements of curtains, and explain the smoke sectors which would be able to manage with a fire crisis condition. The main results accessible are temperature fields, concentration of smoke and visibility.

Design Procedure and Performance Analysis of a Microturbine Combustor Working on Biogas for Power Generation

2019 ◽  
Author(s):  
Bahamin Bazooyar ◽  
Hamidreza Gohari Darabkhani
Keyword(s):  
Performance Analysis ◽  
Fossil Fuels ◽  
Low Cost ◽  
Research Work ◽  
Design Procedure ◽  
Gaseous Emissions ◽  
Cfd Modelling ◽  
Gas Combustion ◽  
Natural Gas Combustion ◽  
And Performance

Abstract Design of the combustor is of high priority in microturbine generators (MTG) due to the small and compact configuration of these type of generators and high range of the shaft revolution (normally over 100k rpm). Design process of the MTG components including the micro combustor and turbomachinery also require accurate description of the combustion phenomena, heat transfer, emission level and performance analysis of the system. Design of combustors for renewable fuels such as biogas has several complications including overcoming the lower heating value of the biogas (normally 1/3 of the natural gas), combustion instabilities and corrosion effects of burning these types of fuels. The main benefit of burning a carbon neutral fuel (e.g., biogas), however will be in reducing the carbon emission by avoiding fossil fuels and achieving the environmental targets (e.g., Paris Agreement). The tubular combustors are in the centre of attention in design and operations of the microturbines due to their low cost and the level of emission. This research work presents the design procedure and CFD modelling of a tubular combustor for a biogas burnt microturbine engine assembly. The biogas is generated from anaerobic digestions of agriculture waste and include a 57% and 43% mixture of methane and CO2 respectively. All the combustor parts are designed with empirical and practical equations and dimensions are optimised by CFD simulations. Operation of the combustor is then analysed in terms of its gaseous emissions. Finally, the operation of the new combustor in a closed heat and power cycle was verified and compared with conventional combustor of the microturbine burning diesel fuel, and as a result all the benefits and considerations for the application of biogas in microturbine assembly are carefully remarked and discussed.

Thermal Analysis of Low-Cost Dwellings in Mexico Using Greenroofs

2011 ◽  
Author(s):  
Mari´a G. Alpuche ◽  
Irene Marincic ◽  
Jose´ M. Ochoa ◽  
Hugo C. Moreno ◽  
Paloma Giottonini
Keyword(s):  
Energy Consumption ◽  
Air Conditioning ◽  
Low Cost ◽  
Concrete Block ◽  
Building Envelope ◽  
Air Cooling ◽  
Design Strategies ◽  
Cooling Systems ◽  
Air Conditioning Systems ◽  
Electricity Energy Consumption

According to the National Energy Balance (1), the electricity consumption in the residential and commercial sector represents thirty-three percent of the total consumed in the country. Most of the energy is consumed during the summer, when it is necessary to use air conditioning to maintain comfort conditions inside buildings. This aspect takes relevance in warm-dry climates, where a deficient design of building envelope and a wrong location of windows can increase the thermal loads producing an extra load to air conditioning systems and high costs by electricity energy consumption. For this reason, adequate design strategies and thermodynamic concepts have to be applied in order to make dwellings comfortable. Two dwellings are simulated and analyzed, the first one is made of regional materials like traditional concrete block walls, reinforced concrete roofs and economic finishes, the second one is proposed with a green roof and insulation in walls. The heat gains through the different constructive elements have been obtained, to analyze their impact on global thermal comfort and the electricity energy consumption of air cooling systems. Also, an exergy analysis has been applied to analyze exergy efficiency of air cooling systems and the influence that the building envelope can have in them with the proposed changes. The minimum exergy expenditure of air conditioning systems required to achieve comfort conditions inside dwellings could be a useful benchmark for the comparison of various dwelling designs.

Conceptual understanding of Kshara Karma in Shalakya Tantra

2017 ◽  
Vol 2 (3) ◽  
Author(s):  
Mahantaswamy S. Chappanmath ◽  
Vinod M. Jadhav
Keyword(s):  
Conceptual Understanding ◽  
Surgical Procedures ◽  
Research Work ◽  
Effective Management ◽  
Optimum Result

Kshara Karma, Agni Karma is known as Anushastra Karmas. Popularly understood as Para surgical procedures. They are outstanding contributions of Acharya Shushruta. The surgical disorders are managed with these procedures with ease and comfort for both surgeon and patients. In Shalakya Tantra there is a need of adopting these procedures for effective management of disorders such as Upajihwa, Adhijihwa, Upakusha, Dantavaidharbha, three types of Rohini, Nasarsha, Karnarsha and Pakshmakopa. Kshara Karma said to be one among the Anushastra Karma explained by Acharya Shushruta which is not widely practised and popularised in Shalakya diseases. There is need of research work in this area to utilize Kshara Karma and give optimum result.

Introduction and Preliminary Investigation of Buoyancy Assisted Robots That Are Cheap, Safe, and Will Never Fall Down

2021 ◽  
Author(s):  
Matthew David Williams ◽  
Dennis Hong
Keyword(s):  
Genetic Algorithm ◽  
Preliminary Analysis ◽  
Preliminary Investigation ◽  
Research Work ◽  
Legged Robots ◽  
Dynamical Analysis ◽  
Future Research ◽  
The Novel ◽  
Drag Forces ◽  
New Family

Abstract We introduce and define a new family of mobile robots called BAR (Buoyancy Assisted Robots) that are cheap, safe, and will never fall down. BARs utilize buoyancy from lighter-than-air gases as a way to support the weight of the robot for locomotion. A new BAR robot named BLAIR (Buoyant Legged Actuated Inverted Robot) whose buoyancy is greater than its weight is also presented in this paper. BLAIRs can walk “upside-down” on the ceiling, providing unique advantages that no other robot platforms can. Unlike other legged robots, the mechanics of how BARs walk is fundamentally different. We also perform a preliminary investigation for BARs. This includes comparing safety, cost, and energy consumption with other commercially available robots. Additionally, the preliminary investigation also includes analyzing previous works relating to BARs. A dynamical analysis is performed on the novel robot BLAIR. This is presented to show the impacts of buoyant and drag forces on BLAIRs. Preliminary analysis with the prevalence of drag is presented with simulations using a genetic algorithm and simulations. Results show that BARs with different mechanisms prefer different styles of walking gaits such as prancing or skipping. This work lays the foundation for future research work on the gaits for BARs.

Numerical Study on Flow Characteristics in High Multi-Stage Pressure Reducing Valve

2017 ◽  
Author(s):  
Fu-qiang Chen ◽  
Zhi-xin Gao ◽  
Jin-yuan Qian ◽  
Zhi-jiang Jin
Keyword(s):  
Energy Consumption ◽  
Numerical Study ◽  
Research Work ◽  
Flow Characteristics ◽  
Temperature Fields ◽  
Turbulent Dissipation ◽  
Technological Support ◽  
Multi Stage ◽  
Valve Opening ◽  
Pressure Reducing Valve

In this paper, a new high multi-stage pressure reducing valve (HMSPRV) is proposed. The main advantages include reducing noise and vibration, reducing energy consumption and dealing with complex conditions. As a new high pressure reducing valve, its flow characteristics need to be investigated. For that the valve opening has a great effect on steam flow, pressure reduction and energy consumption, thus different valve openings are taken as the research points to investigate the flow characteristics. The analysis is conducted from four aspects: pressure, velocity, temperature fields and energy consumption. The results show that valve opening has a great effect on flow characteristics. No matter for pressure, velocity or temperature field, the changing gradient mainly reflects at those throttling components for all valve openings. For energy consumption, in the study of turbulent dissipation rate, it can be found that the larger of valve opening, the larger of energy consumption. It can be concluded that the new high multi-stage pressure reducing valve works well under complex conditions. This study can provide technological support for achieving pressure regulation, and benefit the further research work on energy saving and multi-stage design of pressure reducing devices.

scholarly journals STRUCTURAL EXPLORATION AND PHARMACOPHORIC INVESTIGATION OF PYRAZOLE BASED ANALOGS AS NOVEL HISTONE DEACETYLASE 1 INHIBITOR USING COMBINATORIAL STUDIES

2018 ◽  
Vol 10 (3) ◽  
pp. 90
Author(s):  
Avineesh Singh ◽  
Harish Rajak
Keyword(s):  
Molecular Docking ◽  
Histone Deacetylase ◽  
Histone Deacetylase Inhibitors ◽  
Research Work ◽  
3D Qsar ◽  
Qsar Model ◽  
Docking Studies ◽  
Inhibition Activity ◽  
Design Strategies ◽  
Histone Deacetylase 1

Objective: Histone deacetylase inhibitors (HDACi) have four essential pharmacophores as cap group, connecting unit, a linker moiety and zinc binding group for their anticancer and histone deacetylase (HDAC) inhibition activity. On the basis of this fact, the objective of this research was to evaluate the exact role of pyrazole nucleus as connecting unit and its role in the development of newer HDACi.Methods: Ligand and structure-based computer-aided drug design strategies such as pharmacophore and atom based 3D QSAR modelling, molecular docking and energetic based pharmacophore mapping have been frequently applied to design newer analogs in a precise manner. Herein, we have applied these combinatorial approaches to develop the structure-activity correlation among novel pyrazole-based derivatives.Results: the Pharmacophore-based 3D-QSAR model was developed employing Phase module and e-pharmacophore on compound 1. This 3D-QSAR model provides fruitful information regarding favourable and unfavourable substitution on pyrazole-based analogs for HDAC1 inhibition activity. Molecular docking studies indicated that all the pyrazole derivatives bind with HDAC1 proteins and showed critical hydrophobic interaction with 5ICN and 4BKX HDAC1 proteins.Conclusion: The outcome of the present research work clearly indicated that pyrazole nucleus added an essential hydrophobic feature in cap group and could be employed to design the ligand molecules more accurately.

scholarly journals Sistema de Iluminação Publica Inteligente

2020 ◽  
Author(s):  
Fábio Rodrigues de la Rocha
Keyword(s):  
Quality Of Life ◽  
Smart Cities ◽  
Low Cost ◽  
Research Work ◽  
Sustainable Growth ◽  
Street Lighting ◽  
Rational Use

Public street lighting management is a well known problemwhich can be revisited from the perspective of Smart Cities.In Smart Cities there is an interconnection of services andinfrastructure to provide sustainable growth and improvementsin citizens’ quality of life. In this research work, weexplore new low cost technologies to create a smart streetlight system capable of monitoring and controlling the lamps,thus reducing the costs with maintenance and allowing amore rational use of electricity.

scholarly journals A Partial Optimization Approach for Privacy Preserving Frequent Itemset Mining

2010 ◽  
Vol 1 (1) ◽  
pp. 19-33
Author(s):  
Shibnath Mukherjee ◽  
Aryya Gangopadhyay ◽  
Zhiyuan Chen
Keyword(s):  
Low Cost ◽  
Synthetic Data ◽  
Frequent Itemset ◽  
Optimization Approach ◽  
Data Generator ◽  
Hidden Cost ◽  
Potential Benefits ◽  
The Difference ◽  
The Given ◽  
Optimal Set

While data mining has been widely acclaimed as a technology that can bring potential benefits to organizations, such efforts may be negatively impacted by the possibility of discovering sensitive patterns, particularly in patient data. In this article the authors present an approach to identify the optimal set of transactions that, if sanitized, would result in hiding sensitive patterns while reducing the accidental hiding of legitimate patterns and the damage done to the database as much as possible. Their methodology allows the user to adjust their preference on the weights assigned to benefits in terms of the number of restrictive patterns hidden, cost in terms of the number of legitimate patterns hidden, and damage to the database in terms of the difference between marginal frequencies of items for the original and sanitized databases. Most approaches in solving the given problem found in literature are all-heuristic based without formal treatment for optimality. While in a few work, ILP has been used previously as a formal optimization approach, the novelty of this method is the extremely low cost-complexity model in contrast to the others. They implement our methodology in C and C++ and ran several experiments with synthetic data generated with the IBM synthetic data generator. The experiments show excellent results when compared to those in the literature.

scholarly journals Re-thinking Re-construction New Design Strategies for the Reconstruction after Natural Disasters. A Local Research Experience for a Global Topic

2019 ◽  
Author(s):  
Roberto Bianchi ◽  
Roberto Ruggiero
Keyword(s):  
Natural Disasters ◽  
Rural Areas ◽  
Design Research ◽  
Low Cost ◽  
Central Italy ◽  
Urban System ◽  
Housing Demand ◽  
Urban Systems ◽  
Research Experience ◽  
Design Strategies

The paper presents the ongoing results of a design research carried out at the School ofArchitectureandDesign” EduardoVittoria”of Ascoli Piceno(SAAD)of the university of Camerino. Thespecificobjectiveoftheresearchistodevelopaninnovativeandreplicabledesign methodology, and to experiment new design strategies devoted to the sustainable, compatible and innovative-construction after natural disasters in rural areas and low-density urban systems. The research is based on a “local-to-global” approach: it refers to Italy as a case study but it aims to achieve general results applicable in different geographical contexts. Thespecificcasestudyrelatestotheearthquakethatin2016/2017affectedasignificant area of Central Italy and that strongly hit a large part of the so called “Italian village system”, i.e. a peculiar environmental and productive urban system that is still now in real emergency. As in most of the international reconstruction experiences, this reconstruction will certainly require along process which,still today,is full of unknowns. The massive damage caused by this disastrous event, the constraints imposed by regulations and the need for and adaptation of the buildings stock to the current housing standards, exclude the possibility of applying design strategies focused on a “where it was/as it was” model. This awareness, which increases the uncertainty about the future of the ”earthquake” communities, requires an innovative approach in relation to apparently incompatible aspects: the preservation of the identity of lost places and the upgrade of building performance often explicitly required by the population and however connected to a new housing demand. In relation to worldwide territories with a high level of disaster risk, this scenario can nowadays be considered a global issue which concerns both cultural and technical aspects. The design methodology pursued is based on a scientific approach to re-construction that focuses on a “systemic” and “design to build” approach that concerns also productive and technological aspects in relation to purposes of low-cost performance, constructive simplicity, cost-effectiveness of the interventions. This approach aims also at the introduction of the lightweight building system in contexts of traditional and massive construction, according to an idea of a construction site as an “assembly point” of prefabricated parts, light and modular, with a controlled life-cycle.

scholarly journals THERMAL COMFORT AND ENERGY SOLUTIONS FOR A BETTER RESIDENTIAL ENVIRONMENT IN MALAYSIA

2015 ◽  
Vol 13 (5) ◽  
Author(s):  
Noor Aziah Mohd Ariffin
Keyword(s):  
Thermal Comfort ◽  
Air Conditioning ◽  
Energy Savings ◽  
Energy Performance ◽  
Data Monitoring ◽  
Medium Density ◽  
Design Strategies ◽  
Residential Energy ◽  
Passive Design ◽  
Design Systems

In hot-humid Malaysia, there are around five million units of housing. Among these, the medium-density terraced are the most built. However, little emphasis was given to designing for thermal comfort and energy efficiency. Consequently, air-conditioning is ubiquitous with ever-rising residential energy consumption. This paper studied passive design systems to improve living conditions and conserve energy through orientation and insulation parameters for terraced housing. Utilizing a triangulation of methods to correlate between thermal comfort and energy performance, findings from the questionnaire survey, data monitoring and computer simulation contended that with the passive design strategies minimum thermal comfort is attainable and energy savings predicted.

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