No abstract

Резюме. Цель. Применение абсорбционной бромистолитиевой холодильной машины (АБХМ) для охлаждения циклового воздуха перед газотурбинной установкой (ГТУ) парогазовой турбины (ПГУ) в условиях жаркого климата доказало свою эффективность. Актуальным является поддержание проектных значений, для чего проводится постоянный мониторинг и, при необходимости корректируются параметры работы. Целью данной работы является проведение комплексного анализа АБХМ в составе энергосберегающей системы. Метод. В качестве методов исследования принят метод энергетического и эксергетического анализа по результатам натурного производственного эксперимента. Результат. Энергетический анализ проводился с использованием диаграммы ξi для раствора бромистого лития с водой. По результатам энергетического анализа выявлены отклонения в работе АБХМ, а эксергетический анализ подтвердил эти отклонения. Вывод. Проведенный анализ работы АБХМ позволил выявить отклонения в работе и причины, их вызывающие. Ключевые слова: энергосбережение, теплоиспользующая холодильная машина, режимы работы, тепловой расчёт, эксергия

Objectives. Simulation modeling is increasingly being used for the study of complex economic, technical, biological, etc. systems. Such systems are characterized by multifactorial relationships of their functioning, nonlinear dependencies between system elements and stochasticity of their parameters, etc. The purpose of this work is to develop a simulation model based on the C# programming language for the energy-saving CCGT-110 and ABCM system based on the results of manual analysis according to the data of a full-scale experiment.Method. Methods of linear and nonlinear approximation, methods of energy and thermodynamic analysis, as well as methods of mathematical simulation modeling are used to develop the simulation model.Result.The result of this work is the developed software SAESS 3.0, which allows you to analyze the operation of the CCGT-110 and ABCM systems together and  separately  in  a  wide  range  of  parameters  and  in  real  time.  Conclusion.To  assess  the adequacy of the developed program, a comparative analysis of software and manual calculation was carried out. Deviations do not exceed an average of 3 %, which confirms the reliability of the simulation model.

The selection of the scheme for optimization of a complex energy saving system was grounded. The method of creation and implementation of the methodology of obtaining necessary data to develop a simulation mathematical model necessary for solving the optimization problem was studied. Using the DataFit 9.0 mathematical analysis program the necessary dependences were obtained in a wide range of operation parameters, which later were assumed as a basis of the mathematical model and optimization program.

Abstract. Aim. Due to the current priority given to energy conservation issues, a promising research avenue in the field of refrigeration consists in the developing of energy-saving systems based on heat-recovery absorption refrigerators. The aim of the work is to study the possibility of using a water-ammonia absorption refrigeration machine to increase the efficiency of food production facilities.Method. Based on an analysis of the initial enterprise data, the possible operating modes of the refrigeration machine were determined considering the various types of heating and cooling sources proposed in the task specification. The identification of the characteristics of single-stage and twostage absorption schemes confirmed the possibility of increasing the enterprise's efficiency through the use of secondary energy resources. Results. The choice of initial data for the design of a singlestage absorption water-ammonia refrigeration machine (AVXM) was justified on the basis of a preliminary analysis carried out to calculate the size of the degassing interval. The calculation was carried out using a ξ – i diagram for the ammonia water solution. Conclusion. Two prior conditions for the design of a high-performance absorption water-ammonia refrigeration machine were determined on the basis of an analysis of four conditions set by the customer. For operating conditions with a low degassing interval value, a scheme for an absorption water-ammonia refrigeration machine employing two-stage absorption is proposed.