Life cycle assessment (LCA) is widely used in the study of energy consumption and carbon emissions of the building construction sector. There are two main approaches toward LCA, that is process-based LCA (bottom-up) and input-output analysis-based LCA (top-down) (Säynäjoki et al., 2017; Monahan and Powell, 2011).Process …
Abstract: Aiming at the problem of high energy consumption in CO 2 liquefaction process on a large LNG-powered ship with Carbon Capture and Storage (CCS) device, a system utilizing LNG cold energy for CO 2 liquefaction was designed,the system scheme were simulated by Aspen HYSYS. Based on the key node A-1, the optimal value of cold …
The production of cement is an energy-intensive process. Typically, energy consumption accounts for 20-40% of production costs. In 2008, the U.S. cement industry spent about …
This paper presents an abbreviated life cycle inventory assessment of a continuously reinforced concrete pavement (CRCP) and an asphalt pavement with respect to the energy consumed by each pavement type for the construction of a roadway. ... Analysis of process energy use of asphalt-mixing plants, Dept. of Industrial and …
Concreting process is taken as case study. The finding pointed the relative importance of this activity in terms of time and cost. ... There was a reduction in energy consumption by the rate of (4 ...
1. Introduction. China's industrial sector accounted for 69.8% of the country's total energy use in 2012. Industrial energy use in China grew at an average rate of 7% per year from 2005 to 2012 [1].In 2010, China became the world's largest energy consumer, accounting for 19% of global energy consumption [2].Moreover, specific heat …
1.1 Ready Mixed Concrete Production. An overview of ready mixed concrete production is shown in Figure 1. According to a survey of. 47 facilities across the United States,2 most of the fuel was used in boilers (49%) for hot-water production and building heat. An …
Concrete is the most-used construction material worldwide. Previous studies on the environmental impacts of concrete production have mainly focused on the materials involved and energy consumption ...
The proposed energy consumption model is crucially based on an empirical validation work that correctly characterizes the auxiliary power loss as a quadratic function of the cutting power. Cutting experiments are then carried out that convincingly confirm the correctness of the proposed energy consumption model. ... (2011) Unit …
Concrete is the most-used construction material worldwide. Previous studies on the environmental impacts of concrete production have mainly focused on the …
As mentioned in Section 3, the data of energy consumption are highly correlated with the data of eight relevant variables.And there are temporal, unstable and nonlinear relationships between these data. In this case, a prediction method of energy consumption based on deep belief network with sliding window named SW-DBN was …
The manufacture of cement is considered as a high energy consumption and environmental pollution process [[2], [3]]. According to the statistics released by Ali et al. [4], the cement industry is responsible for 12 % to 15 % of total energy consumption and approximately 6 % to 8 % of global carbon dioxide emission.
focus on the impact of admixtures on power consumption during concrete mixing, thereby reducing energy consumption in concrete production in ready-mixed concrete plants. The workability test is also conducted for comparison with the power consumption curve. The power consumption during the mixing process also depends on the flow of the …
In 1985, Strauch et al. [31] carried out an energy consumption study on a 63.5 mm diameter single screw extruder, and observed that most of the energy was consumed by the mechanical parts, with less significant levels of consumption in process heating. The energy conversion was then assessed and it was found that heating the …
precast concreting process for both mixing methods entails the pro- ... and evaluate energy consumption of off-site concrete plants based on factory observations and data collection. The results ...
Cement is the binding agent of concrete, the most widely used construction material in the world. ... energy and CO 2 intensive process. In the EU, 90% of ... 2 emissions resulting from this thermal energy consumption only account for 35% of total emissions in 2017. 200 400 600 2005 2007 2009 2011 2013 2015 2017 [PJ]
The different machine states are defined as: (1) Off (no energy consumption), (2) Start/ramp up (the demand for energy spikes due to the turning on of components and heating up steps), (3) Idle (relatively constant energy consumption after the ramp up phase and machine is ready to start production), (4) Operation (the actual …
1. Introduction. Power consumption and therefore efficiency of crushing equipment are becoming increasingly important mainly due to the continuous and rapid increase of energy costs and efforts to minimise CO 2 emissions (Tromans, 2008, Legendre and Zevenhoven, 2014).In order to meet the Paris Climate Agreement goals, …
The process of concrete production begins with the selection and preparation of aggregates, which typically include sand, gravel, crushed stone, or recycled materials. Aggregates are carefully graded to achieve the desired strength, ... Cement production is known for its high energy consumption, which occurs during various …
Worldwide, precast concrete elements are becoming the primary construction materials, and there have been conducted numbers of studies on their manufacturing process, mechanical properties and curing regime. However, the energy consumption of the precast concrete manufacturing process and specifically the …
The slightly higher energy consumption in AM is compensated by the higher purity of concrete waste derived cement fraction. Adopting the low-energy intensive AM …
The cement industry, as a traditional high power consumption industry, power consumption in the cement grinding process takes a large ratio in the whole production, electric power consumption is about 60%-70% of the total consumption. With more and more strict Energy conservation and environmental protection policy published, excess …
The production and utilization of concrete and concrete-based products have drastically increased with the surge of construction activities over the last decade, especially in countries such as China and …
Concrete is a sustainable and versatile construction material which can produce structures that last for thousands of years. Due to the many areas of application, concrete is the second most consumed material on Earth, only after water, with a global production of around 4.1 billion tons of cement in 2021 (Statista, 2023), and an annual …
The optimal DEC regime, consuming a mere 450 min, contrasts with the lengthy 780 min process required for steam curing. By considering time and energy consumption, the unit-strength energy–time product of DEC ranges between 22.01% and 27.86 % (at age 1 d) and 17.93%–23.45 % (at age 28 d) of that of steam curing.
This leads to differences in concrete energy consumption. The power consumption during mixing is divided into different stages. ... minimize energy consumption and using them in concrete production can reduce the energy required for the manufacturing process. Energy optimization in all areas is the ultimate goal in the protection of our …
2.0 Key Performance Indicators of Direct Reduction of Iron Process 9 2.1 Capacity Utilization 10 2.2 Yield 10 2.3 Specific Energy Consumption 11 2.4 Material Balance 12 2.5 Energy Balance 15 2.6 Energy Performance Assessment of Key Equipment 15 3.0 Energy-efficient Technologies in Direct Reduction of Iron Process 17
In 2020, the energy intensity figure for the Rolling mix is 132.4 kWh/t. The figure for concrete and reinforcement is 155.2 kWh/t. To provide an indicator that more accurately reflects the performance of the industry, …
The Publication Process; Post Publication Policy; Testimonials from Editors & Organizers; ... Methods for determining energy consumption during concreting in a shelter Ivan ... This article presents a methodology for calculating shelters and presents the results of calculating the consumption of thermal energy for structural elements of span ...
The production of 1 m³ of concrete requires 2,775 MJ of energy. This energy comes mostly from oil burning, which generates CO2. 2.775 MJ of energy is produced by 0.37 barrels of oil. Saving concrete, e.g. by adopting appropriate building solutions, means therefore not only reducing fossil fuels consumption, but also …
The electrical energy consumption of the cement grinding process is the time series that should be forecasted. We regard the time series as x t, t = 1, 2,…, N, and x ̂ t + m is the m-step-ahead forecasting in period t.In terms of previous models and algorithms described above, the EMD- LSSVR&QES model is formulated as illustrated in Fig. 3.The …
Optimizing Electrical Energy Consumption In Cement Process Plants: Strategies For Energy Conservation And Sustainability M. Sarada Lecturer in Physics KVR Government College for Women (A), Kurnool, AP, India Abstract: With rapid industrialization and urbanization there is a tremendous demand for energy. There are
Taking into account formula (5) and table 2, the coefficient of energy of destruction of granite will be 0.446 J/m3 or, in terms of kg, 1.16 kJ/kg.
Moreover, energy-efficient practices can be implemented in the concreting process, such as using electric mixers, pumps, and vibrators. These tools can be powered by renewable energy sources, …
The introduction of new materials into concrete may increase energy consumption during the mixing process and affect the output during the concrete …
The need for washing and drying the concrete waste prior to the magnetic separation was found to be the bottleneck of the RC production process in terms of energy consumption (Bogas and Sousa 2021; Sousa et al., 2021, 2022). The high energy consumption is driven not so much by the amount of water to be removed, but by the …
