Effects Of Energy Utilization Research Articles

Effect of Energy Utilization on Pakistan’s Economic Development: A Time Series Analysis

The present research has been conducted to study the causal relation among GDP, electricity utilization, exports, real capital and labor force for Pakistan. Time dependent data for the mentioned parameters have been used for the time period of 1980 to 2022. Inter-relations among the above-mentioned variables have been studied in this work by the method of cointegration using bounds test. The results illustrate that there is an existence of long run relation among the parameters where GDP has been taken into consideration as the dependent variable. Granger causation analysis has also been performed for the variables. Results show that Granger causality between GDP and electricity utilization runs in both directions. Moreover, the study discloses that Electricity utilization granger cause exports and per capita real capital. Exports granger cause per capita real capital. Per capita real capital granger cause GDP. Labor force granger cause GDP and exports. The long run relation equation of GDP, Electricity utilization, exports, real capital and labor force has also been examined for parameter stability. The parameters are found to be stable with the significance level of 5%. The research also suggests some significant strategy recommendations.

Technical economic model of energy utilization and energy saving for central heating system

Chinese heating method has gradually shifted from small fragments to centralized regional heating. This heating method has achieved obvious energy-saving benefits. The article establishes an economic model of the energy utilization rate of the central heating system and installs the system exergy balance equation at the same time. The simulation found that the energy utilization coefficient of the heating system is high and has a high energy-saving potential. The effect of energy utilization is poor, and it has great potential for energy saving.

Laser and LED Hybrid Plant Lighting System Design Based on the Particle Swarm Algorithm

This paper developed light-emitting diode (LED) and laser models suitable for the design of uniform surface irradiation systems that use computer algorithms. During the evaluation factor for a two-dimensional particle swarm algorithm, the effects of energy utilization and uniformity were comprehensively considered and LED and laser models were given. The optimal design method was used with a laser and LED hybrid light source. According to the lighting requirements of lettuce, three types of lighting were simulated for the LED and laser models, and the best simulation results were selected for experiments. The experiment verified the feasibility of the above method and obtained a laser and LED hybrid lighting system with an energy utilization rate of about 78% and a uniformity of up to 85%.

An empirical study on energy utilization efficiency, economic development, and sustainable management.

Based on the premise of sustainable development of the environment, how to achieve the balance of energy utilization, economic development, and sustainable management of the environment is becoming increasingly important in the process of stable economic development. This paper analyzes the concept of environmental Kuznets curve, taking 35 European countries as the research objects, first discusses the trend of energy utilization efficiency from 1990 to 2013, and then analyzes the relationship between energy efficiency and economic development. Empirical results show that labor has a significant negative impact on energy efficiency and the increase in labor input will reduce energy efficiency. If the added value of national manufacturing accounts for a higher percentage in GDP, it will have a negative impact on the effectiveness of energy utilization. In addition, when the national price level is high, price fluctuation will increase the price of energy utilization, or the cost of energy input in economic activities, which will further reduce the country's energy efficiency performance. Lastly, the empirical study also found that energy efficiency and economic development showed a quadratic U-shaped relationship, indicating that the long-term energy efficiency of the country will first decline and then rise during economic activities.

Certain trends in power engineering at the beginning of XXI century

The changes in the modern power generating sector are relatively conservative in nature. As long before, the leading role belongs to fossil fuels. The main tendency is the increase of effectiveness of energy utilization and decrease of specific energy consumption in all sectors of economy. Simultaneously, the diversification of energy sources due to wider use of nontraditional and hard-to-develop sources is observed. The share of primary resources subjected to deep chemical processing, as well as the role of secondary energy sources increases. Active displacement of primary and secondary hydrocarbon processing to their production sites takes place. As the consequence of increasing power consumption in all spheres of manufacturing and life, we see fast growing available power and power dependency in all fields of human activity. Uninterrupted power supply is becoming a critical condition for normal life in modern world. The tendency for decentralization of power supply and reliable preservation of energy production capacities is enhancing.

Regulation of Bovine Adipose Tissue Metabolism During Lactation. 5. Relationships of Lipid Synthesis and Lipolysis with Energy Intake and Utilization1,2

The effects of energy utilization during lactation on adipose tissue metabolism were determined in 51 first lactation Holstein heifers producing between 5950 and 10,246kg milk in 305 d. Net energy intake ranged from 18.3 to 40.6 Mcal/d during 28 to 140 d of lactation. Milk yield ranged from 13.5 to 47.4 kg/d and fat percent from 1.49 to 4.60 during 28 to 140 d, providing a range of 8.2 to 32.6 Mcal/d milk energy secretion. Calculated energy balance ranged from −16.4 to 11.5 Mcal/d. Weight change ranged from −70 to 143kg during that 112-d period. Subcutaneous adipose tissue was biopsied nine times from 30 d prepartum to 15 d after lactation ceased. Adipose lipid synthesis measured prepartum was negatively related to subsequent milk energy secretion. Net energy intake, body weight, and body weight change were related positively to adipose lipid synthesis rates from 28 to 56 d, but those rates were related negatively to milk energy secretion. Lipolysis was positively related to milk energy secretion and body weight and negatively related to NE intake. At d 60 of lactation, adipose tissue lipid synthesis rates were a function of body weight, weight gain, and net energy intake. However, catecholamine-stimulated lipolysis rates were a function of body weight and milk energy secretion. After 140 d, lipid synthesis and lipolysis were elevated and more closely related to the previous peak rather than to concomitant milk energy secretion. These relationships demonstrate the effects of dietary energy content and genetic selection for milk production on adipose tissue metabolism.