Development of Hybrid Solar Chimney

The solar chimney technology and its working principle were discovered in the early years mainly for ventilation. Due to the updraft wind, man considered it as a power plant as well; a site where electricity is generated when the wind turbine is rotated by the moving updraft air in the chimney. In large power plants, flue gases are produced from blast furnaces and escapes into the atmosphere at relatively high temperature. These flue gases have high thermal energy in which their energy can be recovered and used to generate electricity. The main purpose of this project is to conduct an investigation on energy recovery of flue gasses that are discharged into the environment via a modified solar chimney. The solar chimney will primarily be dependent on thermal energy converted from the solar energy and heat exchanged from power plants’ flue gases. This report consists of 8 chapters; introduction, literature review, methodology, concept of modification, experimental data, data analysis, recommendation and conclusion. More research is done based on the improvements or modifications that need to be implemented to the existing solar chimney; finned absorber plate, wind rotors, generator housing, and the modified circular chimney. The introduction section basically offers basic understanding on the project and its progress. Papers, websites and books are then quoted in the literature review section to guarantee the integrity of information regarding the project. In the methodology section, forecasting, planning and milestones are set; the analysis approach, flow chart, and Gantt chart. The concept of modification basically highlights the modification done to the model; experiment data highlights the experiment procedures and instrumentations, and a thorough analysis of tabulated data in the data analysis section

Pharmacology profile of 2′-methoxy-6-methylflavone and kavain at recombinant GABAA receptors

GABAA receptors (GABAARs) are a class of physiologically and therapeutically important ligand-gated ion channels. These pentameric receptors occur ubiquitously in the brain with diverse subunit composition, which confers highly complex pharmacology to this receptor class. An impressive range of clinically used therapeutics such as anxiolytics, anaesthetics, sedative hypnotics and anticonvulsants are known to bind to distinct sites found on GABAARs to modulate receptor function. Numerous experimental approaches have been used over the years to elucidate the binding sites of these drugs, but unequivocal identification is challenging due to subtype- and ligand-dependent pharmacology. This thesis focuses on two compounds with anxiolytic effects (2′-methoxy-6-methylflavone and kavain) which are believed to be mediated via GABAARs. However, as the subunit requirement for their actions at GABAARs is poorly understood, we sought to investigate this using electrophysiological and mutational approaches on various human recombinant GABAAR subtypes expressed in Xenopus oocytes

Optimizing Hybrid Fermentation Process: From Dark, Photo and Hybrid Fermentation Parametric Study to Mechanism Proposal and Kinetic Modelling

Energy is a fundamental component of modern society, yet the utilization of fossil fuels during the industrial revolution has resulted in the release of greenhouse gases. To address these environmental concerns, the development of green hydrogen has emerged as a viable alternative to traditional fuel sources. The microbial factory can act as a powerhouse to convert biomass wastes into green hydrogen without the need for extensive energy, creating a positive impact on the globe

Etch Rate and Dimensional Accuracy of Machinable Glass Ceramics in Chemical Etching

Machinable glass ceramic (MGC) is well known in the micro-electromechanical system and semiconductor industry. Chemical etching is used in this experiment to study the performance of MGC. The etching rate of MGC and its accuracy by indentation method is studied. The categoric parameter applied here is the type of chemical etchant used: hydrochloric (HCl), hydrophosphoric (H3PO4) and hydrobromic (HBr) acids; and, numerical parameters are etching temperature and etching solution. The experimental investigation that was carried out is governed by design of experiment (DoE)

Hydrodynamics of binary mixture fluidization in a compartmented fluidized bed

The paper represents an extensive study of hydrodynamic cahracteristics of a fluidized bed in a pilot-plant-scale fluidized bed reactor designed for syngas production and power generation from biomass as a source of renewable energy. An air-blown compartmented fluidized bad gasifier permitting heat transfer between adjacent discrete compartments via solid circulation consists of two compartments, the combustor and the gasifier, operating at bubbling fluidized mode. Results of numerical simulation of the fluidized bed containing monodisperesed size Geldart B particles are represented. A three-dimensional Eulerian-culerian granualr model with closure laws according to the kinetic theory of granular flow is chosen to simulate the multipahse environs at 0.2 - 3.2 times minimum fluidization velocity. The present work reports also experimental results on the fluidization of palm-shell-sand binary mixtures of 2, 5, 10 and 15 wt % of feedstock including the minimum fluidization velocity of palm shell-sand binary mixtures, fluidization quality for different bed diameter, particle size, bed height, and superficial velocity. The velocity and lateral palm shells distributions in the mixtures are discussed