Specific features of combined generation of electric power, heat, and cold by combined-cycle plants

Abstract

Trigeneration systems based on the combined cycle plants of condensation type and the com bined cycle plants of cogeneration type of several possible structures for the simultaneous generation of heat and cold are developed. Two types of their operational modes are considered: trigeneration complexes with separate and simultaneous generation of heat and cold. In the first case, two assemblies (thermotransformers) of different types are used for generation of heat and cold, one of which is designed to generate heat and the second to generate cold. In the second case, the heat and cold are generated simultaneously in one ther motransformer. In the article, the results of thermodynamic analysis and calculations of technical and eco nomic efficiency of the developed trigeneration systems are presented.

Information and Analytical Platform for Evaluating the Effectiveness and Choosing Directions for Improving the Energy and Water Supply Systems of Oil and Gas Chemical Complexes

“…ВВЕДЕНИЕ Системы обеспечения топливом, электрической и тепловой энергией и технологической водой действующих нефтегазохимических комплексов (НГХК) формировались в условиях начала разработки соответствующих месторождений углеводородного сырья (УВС) без учета динамики их развития и взаимосвязей с внешними системами энергообеспечения (ВСЭ). В настоящее время концепция построения перспективных систем энерговодообеспечения (СЭВО) НГХК базируется на принципах генерации энергоносителей (ЭН) в автономных установках с тепловыми двигателями различного типа [1][2][3][4][5] и использовании потенциала горючих низконапорных газов технологических производств и возобновляемых источников энергии [6][7][8][9]. Для решения задач анализа и синтеза СЭВО, высокоэффективных на всех этапах жизненного цикла НГХК, требуется создание специализированного информационно-аналитического обеспечения, позволяющего учесть следующие требования к технологическим и энергетическим элементам в динамике их развития:…”

Utilization plants in energy and water supply systems of oil and gas enterprises

“…where 1 U is the normalized (relative to the base variant) performance for the target products of the OGE; U2 is the utilization factor of OGCRM (0 < U2 ≤ 1); U3…”

“…to the base variant) technical-economic characteristics:1 T is the value of sold technological and energy products;2 T , 3Tis the cost of OGCRM, , catalysts and other auxiliary materials; is the costs of ER and water from external sources; is the costs for maintenance, repair and depreciation of EWSS and TSS equipment;payment to external enterprises for processing and disposal of waste and effluents, payment for emissions and wastewater.Efficiency indicators (Ei) make it possible to assess the EWSS from the standpoint of autonomy of ER (independence from external energy supply systems), the degree of use of RER, LPHG, combustible waste and effluents for generating electric energy, from the standpoint environmental safety and the reliability of providing electric energy and water throughout the LC of the OGE.…”