Efficient utility systems are important both due to the impact utility systems have on the economic efficiency of the process industry, as well as the negative environmental effects of energy conversion. In this paper a methodology is used to build a multi-period MINLP model for steam turbine network of a utility system. The methodology consists of several steps, including the building of a sim...

In this article, the conceptual design of biomass steam gasification (BSG) processes using raw oil palm (ROP) and torrefied oil palm (TOP) are examined in an Aspen Plus simulator. Through thermodynamic analysis, it is verified that the BSG process with torrefied feedstock can effectively enhance the hydrogen yield. When the heat recovery design is added into the BSG process, the system energeti...

Research results are presented for two studies which use the common statistical method of decision trees. First, regression trees of the internal bond (IB) of 0.750” medium density fiberboard (MDF) identified significant regressors (α < 0.05) as “refiner steam pressure” which interacts with “press start control” and “dry fuel bin speed.” The highest IB (mean = 151 psi) occurred with “refiner st...

Materials Engineering, with Elliott Company, in Jeannette, Pennsylvania, and has 34 years of experience in the turbomachinery industry. He is responsible for the metallurgical and welding engineering for the various Elliott product lines within the company. He is the author/coauthor of a number of technical articles related to topics such as abradable seals, high temperature corrosion, fracture...

This paper is concerned with calculating boiler efficiency as one of the most important types of performance measurements in any steam power plant. That has a key role in determining the overall effectiveness of the whole system within the power station. For this calculation, a Visual-Basic program was developed, and a steam power plant known as El-Khmus power plant, Libya was selected as a cas...

In cooperation with other institutions, GRS adapts and validates the CFX code developed by ANSYS for LWR containment applications. In a severe accident scenario in a LWR large amounts of steam and hydrogen are released into the containment at different locations. To simulate the main phenomena relevant for accident scenarios within LWR containments models, especially the ones provided to CFX by...

The aim of this work is to open up the structure of wood while retaining a large amount of hemicelluloses, in particular (galacto)glucomannans. The effects of pre-treatments on wood meal from spruce (Picea abies) with a reducing agent (NaBH4) combined with steam explosion at very mild conditions were investigated. The effects of steam explosion at 160 °C were studied for various residence times...

LUTESS is a testing tool for synchronous software making possible to automatically build test data generators. The latter rely on a formal model of the program environment composed of a set of invariant properties, supposed to hold for every software execution. Additional assumptions can be used to guide the test data generation. The environment descriptions together with the assumptions corres...

The early history of the invention of the steam engine shows without doubt that the British Royal Society, including Isaac Newton personally, deliberately prevented the industrial and naval applications of steam power for nearly 1 00 years. In fact, the Royal Society was so intent on burying Denis Papin's 1690 invention of a paddle-wheel-driven steamship, worked out in collaboration with Gottfr...

The importance of breastfeeding has strong evidence[1]. But in reality, there are many obstacles its implementation[2]. Data shows that exclusive Indonesia is 89.4% (2020). Physical factors due to complications or fatigue after giving birth also have an impact on breast milk production, so mothers tend fail exclusively breastfeed[3][1]. A non-pharmacological method can reduce postpartum stress,...