MODICON PLC全冗余系统在炉膛安全监控系统中的应用简介

主要介绍SBWL为巴基斯坦木扎法戈电站制造的4号锅炉，FSSS选购美国ABB公司产品的概况，性能指标和特点。     

Control of vehicular emission using innovative energy solutions comprising of hydrogen for transportation sector in Pakistan: A case study of Lahore City

Energy, either from non-renewable or renewable sources, is of paramount importance as the progress of a country is gauged on economic development. However, with the use of non-renewable energy resources, the environmental degradation is exacerbating with every passing day in developing countries including Pakistan. On the contrary, the developed countries are resorting to sustainable and renewable energy resources to achieve sustainable development goals. The primary consumer of the non-renewable energy sources is transportation sector in Pakistan, with the total consumption amounting to almost two-third of the total utilization. Keeping in view the existing energy expenditures and its share in environmental pollution by transportation sector, Lahore Metropolitan area has been selected for this research paper. This research analyzed the environmental data collected from multiple road junctions of Lahore City. In light of the existing data, the research exhibited improvements in overall environmental quality by comparing the existing and proposed energy solutions comprising of Hydrogen in transportation sector. The comparison carried out by utilizing International and National Environmental quality standards. Additionally, research also addresses the energy savings with the transition from non-renewable energy sources to renewable and innovative energy solutions.     

Feasibility study of renewable energy sources for developing the hydrogen economy in Pakistan

Hydrogen energy can play a pivotal part in enhancing energy security and decreasing hazardous emissions in Pakistan. However, hydrogen energy can be sustainable and clean only if it is produced from renewable energy sources (RES). Therefore, this study conducts feasibility of six RES for the generation of hydrogen in Pakistan. RES evaluated in this study include wind, solar, biomass, municipal solid waste (MSW), geothermal, and micro-hydro. RES have been evaluated using Fuzzy Delphi, fuzzy analytical hierarchy process (FAHP), and environmental data envelopment analysis (DEA). Fuzzy Delphi finalizes criteria and sub-criteria. FAHP obtains relative weights of criteria considered for choosing the optimal RES. Environmental DEA measures relative efficiency of each RES using criteria weights as outputs, and RES-based electricity generation cost as input. The results revealed wind as the most efficient source of hydrogen production in Pakistan. Micro-hydro and Solar energy can also be used for hydrogen production. Biomass, MSW, and geothermal achieved less efficiency scores and therefore are not suggested at present.     

Green hydrogen production potential for developing a hydrogen economy in Pakistan

Pakistan's energy crisis can be diminished through the use of Renewable and alternative sources of energy. Hydrogen as an energy vector is likely to replace the fossil fuels in the future owing to the political, financial and environmental factors associated with the latter. In this regard it is imperative that conscious effort is directed towards the production of hydrogen from Renewable resources. Renewable energy resources are abundantly available in Pakistan. The need to produce Hydrogen from Renewable resources in Pakistan (or any developing economy) is investigated because it is possible to store vast amount of intermittent renewable energy for later use. Thus the introduction of Hydrogen in the energy supply chain implies the start of a Pakistan Hydrogen Economy. Many nations have developed the Hydrogen Energy Roadmap, and if Pakistan has to follow suite it is only possible through the employment of Renewable energy resources. This study estimates the potential of different Renewable resources available in Pakistan i.e. Solar, Wind, Geothermal, Biomass and Municipal Solid waste. An estimate is then made for the potential of producing hydrogen from various established technologies from each of these Renewable resources. A number of reviews have been published stating the availability and usage of Renewable energy in Pakistan; however no specific study has been focused on the use of Renewable resources for developing a Hydrogen economy or a power-to-gas system in Pakistan. This study concludes that that Biomass is the most feasible feedstock for developing a Hydrogen supply chain in Pakistan with a potential to generate 6.6 million tons of Hydrogen annually, followed by Solar PV that has a generation potential of 2.8 million tons and then Municipal solid waste with a capacity of 1 million ton per annum.     

Determinants of livelihood vulnerability in farming communities in two sites in the Asian Highlands

ABSTRACT

To identify the indicators of adaptive capacity that determine vulnerability of households, an intensive investigation was conducted in farming communities at two locations in the Asian highlands. Livelihood vulnerability was assessed, classified to four categories and regressed against current adaptive capacity using logistic regression. Household head’s education, irrigated land, non-agricultural income, and technologies used were associated with adaptive capacity. The strengthening of human, natural and financial capital is identified as the best means of managing risk in farming communities in this mountainous region.     

Strongly correlated intermetallic rare-earth monoaurides (Ln-Au): Ab-initio study

In this paper, we explored the structural, elastic and mechanical properties of the strongly correlated electron systems, intermetallic Ln-Au (Ln = Ce, Pr, Nd, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) in cubic structure, using PF-LAPW method within the density functional theory. Structural properties of these intermetallics were investigated by treating the exchange-correlation potential with the GGA-PBE, GGA-PBEsol and GGA + U. The effectiveness of the U for the structural properties as compared to other methods confirms the strong correlated nature of these compounds and the calculated lattice constants endorse the divalency of Yb. The results demonstrate the stable cubic CsCl structure of these compounds. Bulk modulus, Young's modulus, shear modulus, B/G ratio, Cauchy pressure, Poisson's ratio, anisotropic ratio, Kleinman parameters and Lame's coefficients were studied using the PBEsol to evaluate their importance in various types of engineering applications. The most prominent features of these compounds are their ductility, very high melting points, resistance to corrosion, and anisotropic nature.     

Islamic home financing in Pakistan: a SEM-based approach using modified TPB model

The present study attempts to examine the Islamic home financing using the modified theory of planned behavior model (TPB). Sample data of 375 are conveniently drawn from walk-in customers of Islamic banks located in the biggest city Karachi. This study employed both exploratory factor analysis and confirmatory factor analysis to confirm the validity and reliability of the measurement model. The modified theoretical framework was examined by applying the structural equation modeling using frequently reported goodness-of-fit indices. The findings indicate that the original constructs of TPB model, attitude (ATT), subjective norm (SN) and perceived behavioral control has a positive and significant impact on the customer intention to use Islamic home financing. Furthermore, ATT is found to be the most influential factor in determining the customer intention toward Islamic home financing. On the other hand, we introduced two new factors, pricing on home financing (PHF) and religious belief (RB), which proved their presence in the TPB model by showing a significant impact on the customer intention to use the facility of home financing. In addition, PHF has a negative impact while religious belief has a positive relationship with the customer intention to use Islamic home financing in Pakistan. This study also suggests that the standard TPB model is successfully modified by introducing PHF and RB factors. Therefore, Islamic bank managers should consider this study to promote the Islamic home financing facility in Pakistan.     

A review on the natural gas potential of Pakistan for the transition to a low-carbon future

Natural gas is the world’s fastest growing and widely used fossil fuel which can be targeted for transitioning to a low-carbon future. Pakistan was ranked at seventh position among the utmost harmfully affected countries by climate change. It is, therefore, important to develop an effective energy policy toward the reduction of greenhouse gases in the country. This study evaluates the Pakistan’s natural gas industry development by reviewing reserves, production, consumption, infrastructures, and natural gas agreements in place. The total proven natural gas reserve of Pakistan is estimated to be 0.5 Tcm by the end of 2016. There are many active fields in Pakistan among which Sui gas reservoir is the largest. Currently, Pakistan’s natural gas industry is well matured with average size reserves, production capacity, and advanced and organized infrastructure for transmission and distribution network. Therefore, natural gas can be used to feed different sectors of the country, to decrease the financial burden of importing oil, and to reduce CO₂ emissions. However, increasing the gap of demand–supply for natural gas in the future, declining the average gas reserves, and postponing the gas import may challenge the natural gas industry, climate, and performance of Pakistan’s economy. Thus, these concerns must be addressed to help the natural gas industry for an easy transition to a low-carbon future.     

Planning of rural development centres in Pakistan

Rapid advances in technology and the multiplication of functional responsibilities demand proper planning and control of projects. In developing countries, in particular, managers and engineers cannot plan and control projects using only experience or conventional project management methods that demand their presence at critial moments. The problem of setting up rural development centres in the Punjab, Pakistan, is presented. The choice of method used to ensure that these centres were available in a specified time and that the system was adopted is discussed, together with the problems of impementation. The results of the methods used are presented and overall conclusions are drawn.     

Distribution and circumstances of injuries in squatter settlements of Karachi, Pakistan

OBJECTIVES: This research was conducted to study incidence, distribution, type, causes, severity and circumstances of injuries among people living in squatter settlements in Karachi, Pakistan. METHODS: Trained interviewers sought a 2 weeks recall for minor injuries for which no health care was sought, 2 months recall for major injuries for which a health provider was consulted and 1 year recall for hospitalization, disability and death from every third household in five squatter settlements in Karachi between May and August 1995. For understanding the injury circumstances 250 in-depth interviews of the injured or the close relatives were also conducted. RESULTS: Among 1182 households, having 9891 residents, 84 minor, 42 major injury episodes, 7 hospitalizations, 0.6 permanent disabilities and 0.3 deaths per 1000 person years were reported. Including all injury episodes, the common types of injury were cutting or piercing (n = 532), falls (n = 382) and burns (n = 235) estimating to 54, 38 and 23 injury episodes per 1000 person years. Injury mainly resulted from a piece of glass (n = 367), falling from height (n = 98) and knife (n = 97) estimating to 37, 10 and 10 injury episodes per 1000 person years, respectively. Fall (n = 32, 3.2/1000 person years) was the major reason for hospitalizations and all permanent disabilities resulted from closed injuries. Medically trained providers were mostly contacted (n = 339, 34/1000 person years), but traditional healers were preferred in bone injury. CONCLUSION: Injuries are a major cause of morbidity and mortality in Pakistan and the national health and development agenda should include assessment and prevention of injuries.