Progress Report for Annex II--Assessment of Solar Radiation Resources in Saudi Arabia 1993-1997

In 1987, the United States Department of Energy (DOE) and the King Abdulaziz City for Science and Technology (KACST) signed a five-year Agreement for Cooperation in the Field of Renewable Energy Research and Development (R and D), which has been extended to 2000. Tasks include: (1) upgrade solar radiation measurements in Saudi Arabia; (2) assemble a database of concurrent solar radiation, satellite (METEOSAT), and meteorological data; (3) adapt NREL models and other software for Saudi Arabia; (4) develop procedures, algorithms, and software to estimate solar irradiance; and (5) prepare a grid of solar radiation data for preparing maps and atlases and estimating solar radiation resources and solar energy system performances at locations in Saudi Arabia

Evaluation of solar energy research and its applications in Saudi Arabia -- 20 years of experience

Since the mid-seventies Saudi Arabia has been at the forefront of research and development into solar energy. For example, two major international joint research and development (R&D) programs were funded, in cooperation with the United States of America and the Federal Republic of Germany, aimed at developing renewable energy technology and demonstrating its applications by designing and installing several pilot projects. After more than 20 years of research and development it now becomes essential to evaluate these R&D activities in order to determine their benefits to the scientific community, the country, and society in general. This paper therefore presents an evaluation of a number of research projects in terms of their technical and economical performance and feasibility. The paper also discusses the various lessons that have been learned through the operation and maintenance of these projects, and considers the various reasons underlying either their success or failure.

Základní analýza vzduchového chlazení bloku motoru Tatra pomocí metody konečných prvků

The thesis deals with the strength analysis of the engine block of the eight-cylinder air-cooled TATRA engine. The main objective of the work was to assess the engine block for Euro 6 parameters, which will cause an increase in combustion systems by approximately 14% compared to the current serial state. Emphasis was placed on the strength evaluation of the inter-cylinder counters, which are the most exposed parts of the engine block. In the research part of the thesis, the experimental procedures for detecting deformations and consequently the stress of the inter-cylinder counters as well as the other parts of the engine block are mentioned. The stress analysis was carried out by the Finite Element Method using Siemens NX-12 software.Diplomová práce se zabývá pevnostní analýzou motorové skříně osmiválcového vzduchem chlazeného motoru TATRA. Hlavním cílem práce bylo posouzení skříně motoru seřízeného na parametry Euro 6, které způsobí nárůst spalovacích taků o přibližně 14% oproti stávajícímu sériovému stavu. Důraz byl kladen na hodnocení napjatosti meziválcové přepážky, která je nejvíce namáhanou součístí motorové skříně. V rešeržní části práce jsou zmíněny zejména experimentální postupy zjišťování deformací a následně napjatosti meziválcové přepážky jakož i ostatních částí skříně motoru. Analýza napjatosti byla provedena metodou konečných prvků s využitím software Siemens NX-12.330 - Katedra aplikované mechanikyvýborn

Experimental observations of anisotropy in some stress controlled tests on dry sand

Paper from IUTAM/ICM Symp. on yielding, damage and failure of anisotropic solidsAvailable from British Library Document Supply Centre- DSC:9106.17(CUED/D-SOILS/TR--198) / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo