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International Journal of Mechanical Engineering and July - August- 2014 Computer Applications, Vol 2, Issue 4 ISSN 2320-6349 Modelling and Simulation of Solar-Biomass Hybrid Trigeneration using ORC-VCC 12 Dr. Kamal Kishore Khatri , M. Sai Praneeth 12 Associate Professor and Head , Undergraduate student, Mechanical Engineering Dept LNM Institute of Information Technology, Jaipur, India Pondicherry Engineering College Pondicherry-605014, India. saiprnth87@gmail.com Abstract— In this paper, the feasibility of using a solar- biomass hybrid system in trigeneration plants is discussed through thermodynamic modelling and simulation analysis. The system consists of an Organic Rankine Cycle (ORC), a heating- process heat exchanger, and a Vapor Compression Cycle (VCC) system. This study illustrates key output parameters to assess the trigeneration systems considered. These parameters are energy efficiency, exergy efficiency, net electrical power, electrical to cooling ratio, and electrical to heating ratio. The system was modelled using EES software with CODEpro program for the analysis of Solar Flat plate Collector. The novelties of this paper can be summarized as: 1. Small solar field size, in opposition to the current multi-MW trends, to reduce the footprint impact. 2. Organic rankine cycle in place of superheated steam driven Rankine cycle, allowing a reduced heat requirement to drive the prime mover, resulting in a smaller solar field. of Direct Normal Irradiance (DNI), 4–7 kWh/m2 per day. Thus, there is a vast potential for off-grid decentralized solar energy applications. T o take advantage of this resource, one option that is currently of much interest is Concentrating Solar thermal Power (CSP) technologies, also known as solar thermal collectors. The potential for biomass boilers in India is vast with over 370 million tonnes of biomass being produced every year. Biomass is available from agricultural wastes, direct harvesting and as a by- product from industries such as rice mills, sugar mills and saw mills. Biomass is estimated to contribute 46% to the total energy consumption in India and 80% in rural areas. In industry, 40% of the fuel for boilers is supplied from biomass. However, due to problems with infrastructure and the seasonal variability of biomass in India, consumers are struggling to obtain a consistent fuel supply. Furthermore, while biomass is still competitive, prices have increased considerably in recent years Trigeneration usually refers to the simultaneous production of cooling, heating, and power based on a single energy source. It is also known as combined cooling, heating and power (CCHP). Sometimes combined heating and power (CHP) refers to trigeneration. That is, if the heat produced from CHP is used for cooling, as well as heating, the plant is called a trigeneration plant. CHP could refer to a cogeneration plant if it produces only heat and power. In a trigeneration plant, the waste energy from a generation unit, such as a gas turbine, is used to drive both the heating and cooling systems. Therefore, the use of a trigeneration plant results in an improvement of the overall thermal efficiency and a reduction of the contamination to the environment. The degree of improvement of the plant is sensitive to the performance of each unit in the trigeneration plant and the approach of integrating the units of the plant. Trigeneration plants are usually used as decentralized plants in order to keep the cooling and heating demands at the needed temperatures.[2] Page 111 3. Trigeneration (Electricity, Heating, Cogeneration feasibility study. cooling) and Keywords: Trigeneration, Biomass, Organic Rankine Cycle, vapor compression cooling, Cogeneration. I. INTRODUCTION (HEADING 1) According to the 2011 census, 69% of India’s population lived in the countryside and was sustained primarily by agriculture and small local industries. As of 2008, 47.5% of India’s population living in rural areas did not have access to electricity [1]. Just fewer than 24,500 out of 112,401 villages in India without electricity were classified as being in remote and inaccessible areas. The financial viability of extending the electricity grid to these areas is poor due to a dispersed population with a low peak power demand. Currently, the grid already suffers from high transmission and distribution losses, blackouts and power theft. Progress to improve the grid has been slow due to India’s rapidly growing energy demand and population. In 2008, India used 0.84 million GWh of electricity, demonstrating a tremendous growth in electrical energy usage in the past decade. India receives a high level www.ijmca.orgPDF Image | Modelling and Simulation of Solar-Biomass Hybrid Trigeneration using ORC-VCC
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