MM SCIENCE JOURNAL I 2019 I JUNE 2935 METHODS OF INCREASING THE EFFICIENCY OF COGENERATION BASED ENERGY EQUIPMENT MIROSLAV RIMAR, MILAN ABRAHAM, MARCEL FEDAK, ANDRII KULIKOV, PETER ORAVEC, JAKUB VAHOVSKY Technical University of Kosice, Faculty of Manufacturing Technologies with a seat in Presov, Department of Process Technique, Presov, Slovak Republic DOI: 10.17973/MMSJ.2019_06_2019025 miroslav.rimar@tuke.sk The evaluation of the performance characteristics of the device has a many type, depending on the monitored parameters. In the field of continuous measurements there is a quantum of measurement systems that allow long-term tracking and feedback. Part of the submitted contribution concerns the creation of a cogeneration unit model to monitor the flue gas pathways in relation to the production of pollutants in a non- destructive method. In the case of non-destructive monitoring and interventions in the objects, the use of the virtual laboratories. Such laboratories represent a computer- generated virtual environment in which a model of a particular device is created and a simulation of specific aspects of the matter. The priority given in this paper focuses on the correctness of the operation of the existing system in the case of integration of an external device into the existing flue path and the subsequent analysis of the influence of the further course of the flue gas particles. KEYWORDS Efficiency, cogeneration, ansys, simulation, energy 1 INTRODUCTION The integration of new energy sources and renewable energy- based systems is becoming more useful in modern technology. Cogeneration systems from the point of view of energy production are becoming a more significant part of modern alternative sources. The elaborated paper describes a particular installed cogeneration unit. The functionality of a dismantled cogeneration unit consists of a diesel engine driving an asynchronous generator connected from a heat exchanger system. [Rimar 2018] Integrating renewable energy sources and a cogeneration system on the basis of Act No. 309/2009 Coll. becomes an important part of energy production. The implementation of Directive 2004/8 / EC of the European Parliament and of the Council is an essential element of the development of the internal energy market. [Act No. 309/2009] [Directive 2004/8/EC]. The proposed cogeneration systems are optimized according to economic and energy requirements with respect to environmental criteria. [Rimar 2018]. The main idea of installing cogeneration units is to reduce the cost of primary energy, reduce pollution and increase efficiency by integrating renewable energy sources. [Rajniak 1997] [Mackay 2009] The evaluation of the performance characteristics of the device has a number of types, depending on the parameters monitored. Most importantly in the cogeneration operation is the monitoring of the parameters of the cogeneration unit itself. These are typically monitored by an autonomous control system that enables online access to data measurement. However, the measurements are aimed at maintaining the required output power quantities. The measurement of combustion products is carried out using the same methodology as for conventional heat sources. In practice, discrete methods of measurement are used to assess compliance with legislative limits. [Act No. 309/2009] [Directive 2004/8/EC] In the field of process optimization, continuous measurements are used, allowing for the observation of long periods of time and their retrospective evaluation. However, the use of such a measurement method is difficult in terms of comparing measurements, as it often does not allow measurement on multiple devices at the same time. One option is to use the so- virtual laboratories. These laboratories represent a computer-generated virtual environment in which a particular device model is created. In these cases, it is possible to track various input, output and operating variables at the desired time increments. A variety of simulation tools such as ANSYS are used to create a virtual lab. Part of the submitted contribution concerns the creation of a cogeneration unit model to monitor the flue gas pathways in relation to the production of pollutants, not only to the facility but also to the surroundings of the installation. The simulation allows you to vary input and operating conditions, install various components such as heat exchangers, coolers, heaters, turbochargers and other devices and monitor their impact on a particular improvement of an existing system. In this way, it is possible to increase the efficiency of the power plant. Software ANSYS 19.0 was used for software simulation and presentation of computational analyses. Simulation software nowadays often provides a perfect model of the current technical aspect. [Tadeusz 2006] 2 MATERIALS AND METHODS The issue addressed in this paper is aimed at demonstrating the operation of an integrated facility on the principle of CHP (Combined Heat and Power Production) in an existing system of CHS. The proposal represents an integrative link with the already existing system of central DHW preparation, heat and electricity supply. Virtualization of the device in the simulation environment is performed in relation to the interaction with the external environment. Compared to conventional methods of producing electricity, where the heat generated in the production of electricity is understood to be waste heat, the cogeneration unit thus produced by the waste heat permits the use of heating energy or heat for the preparation of DHW as a source of heat. [Krbek 1999] In contrast to the conventional power generation process, where the efficiency in the thermal power plants is about 30% or more. In steam-gas cycles where efficiency is reached at 50-60%, CHP technology enables the use of fuel energy with efficiency ranging from 80-90%. [Krbek 1999] In terms of flue gas production, the CHP contribution is assessed in relation to cumulated combined energy production. The monitored period represents the winter traffic represented by January and the summer operation in August for the years 2015 to 2018. The described cogeneration unit prepares hot water for approximately 1,600 dwellings, elementary school, kindergarten and shopping centers. The cogeneration unit itself consists of a gas combustion engine MWM / TCG 2016 V12C with a generator that provides 600kW of electrical and 650kW thermal rated output. In order to create the flue gas model, it is necessary to perform an analysis characterizing their qualitative parameters. One option is to perform short-term or long-term continuous measurements. The advantage of this method is to accurately determine the values. From the point of view of long-term evaluation, it is also possible to base the theoretical