by Qin Xu  , Kang Nai  and Valery Melnikov

Received: 05 August 2022;  Published: 13 October 2022;  doi: 10.21926/jept.2204034

By using long pulses with extended dwelling time, lowered pulse repetition frequency (PRF) and reduced Nyquist velocity, the radar measurement capability can be enhanced to increase clear-air Doppler velocity data coverage (which is beneficial for radar wind analysis and data assimilation and motivated our previous study). This potential capability is further explored (beyond our previous study) by not only modifying the existing operational clear-air scan mode with a lowered PRF and reduced the Nyquist velocity (t [...]

by Rui Wang  , Husain E. Ashkanani  , Bingyun Li  and Badie I. Morsi

Received: 01 August 2022;  Published: 13 October 2022;  doi: 10.21926/jept.2204033

A unique two-Pathways process using aqueous sodium glycinate for CO2 capture from a split flue gas stream emitted from 600 MWe post-combustion coal power plant was developed in Aspen Plus v.10. The split gas flow rate used was 44.75 ton/h and contained 0.0023 mol% SO2 and 13.33 mol% CO2. The process includes a washing unit, a CO2 absorption unit, a reverse osmosis unit, and a solvent regeneration unit or an ultrafiltration unit. The washing unit uses deionized water to completely remove SO2 and the CO2 absorption u [...]

by Floris Taminiau  and Bob van der Zwaan

Received: 04 August 2022;  Published: 10 October 2022;  doi: 10.21926/jept.2204032

In the Netherlands, an important way to contribute toward achieving climate goals is the large-scale deployment of wind turbines in the North Sea. The North Sea is a unique location for offshore wind power thanks to its strong winds, shallow waters, and proximity to large energy users. Wind turbines generate electricity by extracting kinetic energy from the atmosphere. This kinetic energy is replenished at a finite rate through the mixing of atmospheric layers. The replenishment rate sets a physical limit to the am [...]

by Lie Zhang  , Reza D. Fakhrabadi  , Maryam Khoshkhoo  and Husien Salama

Received: 29 December 2021;  Published: 09 October 2022;  doi: 10.21926/jept.2204031

Integrating large-scale wind energy in modern power systems necessitates high-efficiency mathematical models to address classical assumptions in power systems. In particular, two main assumptions for wind energy integration in power systems have not been adequately studied. First, nonlinear AC power flow equations have been linearized in most of the literature. Such simplifications can lead to inaccurate power flow calculations and result in technical issues. Second, wind power uncertainties are inevitable and have [...]

by Reinhard Haas  , Marina Siebenhofer  , Jakob Lederer  and Amela Ajanovic

Received: 24 June 2022;  Published: 27 September 2022;  doi: 10.21926/jept.2203030

Today, the building sector poses a major problem concerning fossil fuel energy consumption and the corresponding emissions of local pollutants and global greenhouse gases (GHG). In addition, an increasing number of people are living in urban areas, and it is becoming challenging to provide the necessary living space and energy for heating in fast-growing cities. Currently, urban areas host approximately 50 % of the global population and generate 70 % of GHG. The core objective of this study is to analyze the histor [...]

by Pluvinage Guy  and Capelle Julien

Received: 03 March 2022;  Published: 01 September 2022;  doi: 10.21926/jept.2203029

Hydrogen is a dangerous gas due to its low ignition energy, wide flammability range, promotion of the embrittlement of steel, and its high coefficient of permeation for polymers. The fracture toughness and failure elongation of pipe steels are strongly impacted by hydrogen embrittlement, whereas yield stress and ultimate strength are moderately impacted. Specific tools are required for the pipe defect assessment used for the transport of hydrogen, which is pure or blended with natural gas. The safety factors associ [...]

by Alla V. BALUEVA  , Ilia N. Dashevskiy  and Christian Sims

Received: 18 April 2022;  Published: 30 August 2022;  doi: 10.21926/jept.2203028

Due to the increasing need to further develop the world gas and oil industry and the increased public attention to clean energy sources, studying and preventing Hydrogen Induced Cracking is one of the main safety concerns in nuclear power plants, oil pipelines and platforms. In this article, the growth and incubation times for internal Hydrogen Induced Cracks (HIC) are examined. Specifically, these times are modeled in two separate phases - the first phase (I) is a long time approximation, when the crack growth is [...]

by Owen Sedej  , Eric Mbonimpa  , Trevor Sleight  and Jeremy Slagley

Received: 18 February 2022;  Published: 18 August 2022;  doi: 10.21926/jept.2203027

Waste-to-Energy technologies have the potential to dramatically improve both the natural and human environment. One type of waste-to-energy technology that has been successful is gasification. There are numerous types of gasification processes and in order to drive understanding and the optimization of these systems, traditional approaches like computational fluid dynamics software have been utilized to model these systems. The modern advent of machine learning models has allowed for accurate and computationally ef [...]

by Edmund Zolnik

Received: 14 January 2022;  Published: 02 August 2022;  doi: 10.21926/jept.2203026

Monetary incentives to accelerate the transition of private vehicle fleets to zero emissions promote sustainability in the transportation sector. Clean Cars for America to incentivize transactions for new battery power vehicles is a program in furtherance of sustainable transportation goals in the United States. Unfortunately, data on transactions for new alternative fuel vehicles (AFVs) are scarce so empirical research to explore the costs and/or the benefits of such programs is also scarce. Analysis of transactio [...]

by Fabien Leurent

Received: 10 March 2022;  Published: 18 July 2022;  doi: 10.21926/jept.2203025

The carbon footprint of motorized transport modes per unit length traveled encompasses the unit share of the vehicle lifetime emissions, that of the transport infrastructure, and those of the motor energy, considered both from “well to tank” and from “tank to wheel”. In the active modes of transport, i.e., walking and cycling, the counterpart of motor energy is human energy, which is associated with two kinds of carbon flows: the carbon footprint of food intake, – which we call the Food to Body component – and the [...]