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This study uses Aspen Plus to simulate the gasification process in downdraft gasifier according to the characteristics of waste in Indonesia, using a combination of air and oxygen with equivalence ratios (ER) 0.23, 0.30 and 0.40. From the simulation results, it was obtained that the highest value of...

Authors in this publication present the new approach to aircraft systems efficiency evaluation. The research station consists of two units: efficiency evaluation unit and flight simulation unit. The efficiency is evaluated with use of fuzzy inference systems designed in Matlab/Simulink Software. Simulations...

In recent years, with the increasing number of motor vehicles in cities, urban traffic jams, air pollution and other problems have become increasingly prominent. There are a variety of factors affecting road congestion in China, including population, economic factors, urban morphology and policy factors....

Based on scientific evidence, Covid-19 can be transmitted from humanity to humans through droplets, not through the air. These sparks then fall on objects and surrounding surfaces. People who touch these objects or surfaces and then touch their eyes, nose or mouth, can get Covid-19. This virus greatly...

The rapid advancement of technology affects the increasing number of industrial developments and transportation facilities, in line with the increase, followed by the number of fuel users, especially fuel oil (BBM). With increased fuel oil users, especially fuel from fossil fuels, there are an increase...

WMO states that temperature is an important parameter in life and defines temperature as a physical quantity that characterizes the average random motion of molecules in a physical body. The accuracy of temperature measurement on a thermometer is influenced by the selection of the right and accurate...

In order to optimize the ventilation effect of ammonia leakage in the refrigeration machinery room, a food processing enterprise is selected as the subject investigated. The velocity and concentration field distribution during the process of ammonia leakage are discussed through simulation of refrigeration...

Hebei Province is a region sensitive to global climate change. Under the background of climate change and frequent extreme climate events, existing agricultural production structure is facing enormous risk of climate disasters. In order to reduce the risk level of agricultural meteorological disasters,...

With the development of Chinese industry of auto parts, Chinese auto parts export trade is also rapidly developing. The financial crisis occurred in 2013 led to the export value decreased in 2014 and 2015, which fell by 28.6% and 37.5% compared with 2013. In this situation, this paper analyzes the issues...

We often use circular arc method when calculating the stability of the slope. But this kind of method ignores how the slope rate of top influences stability of slope. In this thesis, a destruction model of loess slope is set up to study the regular rule of how the slope rate of top influences stability...

Growth and development in middle- and low-income countries often come at an environmental cost, but is that trade-off always necessary? This study uses a computable general equilibrium model to estimate the macroeconomic and environmental impact of the world’s most significant plurilateral trade agreement,...

Urban traffic issues have widespread economic and environmental implications. This is exemplified in Dili, Timor-Leste’s capital, where rapid urbanization has led to traffic-related economic losses and declining air quality. To tackle this, the integration of digital twin technologies, merging building...

Absorption bandwidth of conventional Micro-Perforated Panel backed by air cavity is limited around 1 octave bands particularly for pore diameter close to 1 mm. Compared with porous material, the absorption bandwidth is relatively narrow. Hence, its applications may become limited. This research shows...

This paper presents the construction and performance evaluation of a solar dryer. The objective of this work is to study the performance analysis of solar dryer system with and without Tono Therm m-65 PCM. In this heated air from a separate solar collector is passed through a food tray, and the drying...

Public interest on the thermal comfort of subway cabin is increasing, since more than 90% of the complaints from passengers are about the thermal discomfort. Some passengers may feel hot, while the others may feel cold even in the same cabin due to the uneven temperature distribution in the cabin. For...

Latent heat thermal energy storage (LHTES) using phase change materials (PCM) is a renewable energy solution that is applicable for implementation in space cooling due to its high energy storage density. A novel thermal energy storage which will encapsulate a PCM layer to absorb the rejected heat from...

This study investigates global research patterns on waste, wastewater, and air pollution with a specific focus on the roles and contributions of non-governmental organizations (NGOs). Using a bibliometric approach, the analysis draws from publications indexed in the Web of Science between 2014 and 2024...

In order to achieve the intelligent transformation of the existing inventory management system and supply chain system for tobacco raw materials, this research aims to establish digital twin models of the main storage facilities such as the tobacco turnover warehouse, direct material storage area, open-air...

China is one of the largest consumers of energy and, consequently, one of the top emitters of CO₂ worldwide. However, it is also one of the largest investors in low-carbon technologies and has set an ambitious target to become carbon neutral by the 2060s. This study analyzes the development of China’s...

High speed railway (HSR) in China will have a rapid growth in the following years. This paper first analyzes the different technological and economic characteristics of HSR, railway, air traffic and highway traffic and finds their unique comparative travelling distances. And then, three representative...

Many studies using computational fluid dynamics (CFD) analysis have been performed on the concentration distribution of indoor contaminants generated in building materials. This study was an attempt to quantitatively evaluate the effect of the contaminant emission source on the concentration and breathing...

The fast ignition and stable combustion of fuel is a very important problem in designing gas turbine combustor. In this paper, the detailed fuel reaction process and primary influence factors for ignition delay time were studied by the chemical kinetic mechanisms. The chemical kinetic mechanisms of RP-3...

The nutritional content of cocopeat does not fully meet plant needs, so it needs to be combined with other organic materials such as manure. In addition, the relatively large porosity of cocopeat will affect plant productivity. This study aims to evaluate the nutrient content of cocopeat and the evapotranspiration...

Instagram is an application that focuses on the use of images and videos to make this application attractive. Users can participate and share content or information, in this case consumer behavior can be seen in making decisions considering products and services. The purpose of this study is to find...

Air conditioning is a device used to stabilize the temperature and humidity of the air in a room. Air conditioning uses volatile refrigerants and absorbs a lot of heat around it so that the surrounding temperature drops. The use of air conditioning requires a large amount of electrical power, resulting...

In permanent magnet motor, the rotor eddy current loss can make the rotor temperature rise, affect the efficiency of motor performance and even lead to permanent magnet demagnetization. In order to improve the efficiency of the motor and protect the magnet which is core part of the motor, some ways must...

In our work, pomelo peel was used as raw material and carbonized by hydrothermal treatment and calcination in air, respectively, to obtain the corresponding pomelo peel biochar. The effects of two different treatment conditions on the adsorption and photocatalysis performance of the product were investigated....

In order to do planning for explosive area, simplified explosion planning calculation model is built based on the relative certainty of chemical explosion. First, simplified explosion-structure mutual model is built to calculate the force situation. This model adopts the peak overpressure calculation...

The airside is a vital object of an airport because the airside area is a high-risk area that should be free from threats such as birds and wild animals. But the real situation is still found flocks of birds that are often on the air side, which is very dangerous if the bird enters the aircraft engine...

High energy usage for transportation and impacts of air pollution paved the way for transport electrification. As part of this, global move towards transport electrification. The core part of a green vehicle is an onboard charger for batteries. It has two stages of power conversion. Level I battery chargers,...

Volkswagen is one of the biggest car manufacturers in Europe and also in the world. The company headquarter is located in Wolfsburg, Lower Saxony, Germany. Volkswagen cars are marketed to all continents of the world, including North America. The case happened in the United States, as in 2015, the United...

The study's aim was comparing community activities along the Batanghari river in the past and present, knowing the economic, social and cultural activities of Batanghari people living along the river basin. The study was conducted from March to October 2017 using a single case study. The location of...

The excessive amounts of carbon dioxide produced in particular by mobile sources is a relevant problem for densely populated urban areas. The study represents the estimation of CO2 masses released by the motor vehicles in one of the Russian Federation regions – Nazran city and Nazran district of Ingush...

The emergence of app-based ride-hailing platforms such as motorbike taxi (online ojek) services, has changed the commuters’ behaviour and mobility pattern in Jakarta. The highly-anticipated Jakarta Mass Rapid Transit (Jakarta MRT), which was launched and operated in early 2019, has gained popularity...

One of the functions and the government’s authority is to pull an arrangement by making decisions. These decisions then become rules that must be obeyed by every citizen. This policy aims as an attempt to resolve a societal problem. The DKI Jakarta Government has implemented various programs for air...

Energy in buildings in tropical regions such as Indonesia is dominated by air conditioning systems. With the high use of electrical energy from tourism accommodation, it will be difficult to develop because operational costs are high. Thus, the purpose of this research is to obtain energy savings from...

Monitoring hydration balance during exercise athletes is crucial. The study aimed to analyze changes athlete’s body fluid loss in general preparation periodization. The research method used is quantitative research which is presented descriptively. The research design used is an experimental pre and...

This study was undertaken to investigate the impact of several shooting distances of cal.177 (4,5 mm) air rifle toward the anatomical pathology changes of gunshot wound (ballistic wound). This observational study, used two domestic dogs (Non SPF) obtained from a local dog breeder. The shooting distance...

Heat pumps effectively support electrification and reduce energy consumption associated with building heating and cooling. Air-source heat pumps (ASHP) use the ambient air as a thermal source or sink for the heat pump (HP). ASHPs are the most common form of HP system in Canadian residential buildings...

Lithium ion batteries using Lithium Titanate Oxide anodes (Li4Ti5O12 / LTO) and Lithium Manganese Oxide cathodes (LiMn2O4 / LMO) have been successfully manufactured. The active components, LTO and LMO, were synthesized utilizing the solid state reaction technique at an 850℃ sintering temperature and...

Facing the increasingly air pollution, the research on robot detecting air microorganism becomes a hot spot. This paper reviews air microorganism robot, air sampling method and small-sized robot and analyzes the characteristics of various robot and sampler, which provides reference for research of new...

Air content in the concrete has an important effect on the performance. The relation of high-performance polycarboxylate superplasticizer with the air content of different grade concrete and the influence of air content in the concrete on the performance were studied. The relation of air content with...

This article presents an investigation on the flow and heat transfer process of a gas turbine fuel nozzle with double channel. The fuel which is influenced by low flow velocity and high-temperature air around nozzle has high probability of coke deposition. The coke deposition problem is related with...

Economic and environmental are always the primary concern of regions’ development. They are both unifying and opposing, how to recognise and dealing with their relations has always the basic issue of development. Shanxi Province is one of the major provinces in my country for coal development and processing....

Aim of this research was to determine sustainability indices based on ecological, economical, socio-cultural, technological and institutional dimensions, and their leverage analysis for the remaining rice fields in Air Manjuto irrigation area, Mukomuko District, Bengkulu Province. The research was conducted...

The Kendari City main road has very heavy traffic because along the road there are public facilities, so the road has heavy vehicle activity. Crowded vehicles can increase air pollution and risk increasing the concentration of lead (Pb) in the air which has the potential to contaminate food around it...

Flight Services are activities provided by Air Transport Business Entities including before the flight (pre-flight), during the flight (in-flight), and after the flight (post flight). With the increasing number of domestic and international companies operating and providing flight services with various...

Liquid Piston Stirling Engine (LPSE), also known as the Fluidyne engine, is a simple external combustion engine that converts low-temperature thermal energy into mechanical oscillations using air and water as working fluids. While previous applications of LPSE have primarily focused on water pumping...

The paper presents the results of numerical simulation of wind pressure on high rise buildings being under construction and planned in Yekaterinburg city (Russia). Simulation is performed in the program ANSYS. The simulated building is placed in a domain that is the numerical analogue of wind tunnel....

The availability of sugarcane bagasse ash produced by Arasoe Sugar Factory, it is not used utilized. That sugarcane bagasse ash has size very fine that it can pollute the air. The sugarcane bagasse ash has silicate content, and it has pozzolan properties. The needs of construction material are something...