284 American Scientific Research Journal for Engineering, Technology, and Sciences (ASRJETS) ISSN (Print) 2313-4410, ISSN (Online) 2313-4402 Β© Global Society of Scientific Research and Researchers http://asrjetsjournal.org/ A Feasibility Study of a CHP System in a Commercial Facilities: Sizing and Parameters Analysis Md Jabed Hossaina*, Shuva Mitrab, Raihan Uddin Ahmedc aAssistant Professor, Stamford University Bangladesh, Dhaka-1217, Bangladesh b,cLecturer, Stamford University Bangladesh, Dhaka-1217, Bangladesh aEmail: jabed@stamforduniversity.edu.bd bEmail: svm2787@gmail.com cEmail: raihanahmed95@stamforduniversity.edu.bd Abstract The focus of this report is to design a CHP system using energy demand load profile for a food distribution center. This study has investigated energy requirements in food industry. The main distinction of this report is to carry out economic and environmental analysis of a CHP system. Case studies based on food industry demonstrates that the CHP system is able to run continuously at optimal efficiency and operational costs of the CHP system can be effectively reduced in both electric and heating cost. Keywords: CHP; CO2; trapezium; turbine; CCL; kWh; Heat energy; Electrical energy; Quality Index (QI); GHG. 1. Introduction The consumption of both electrical and heat energy is rising rapidly over the last few [1] decades where global energy demands have not yet been fully realized due to the lack of sophisticated technologies and sufficient energy resources so the world is facing severe energy crisis and it is expected to increase in the forthcoming years. Nowadays, the global power and heat generation are majorly done using conventional energy sources though such energy reserve is very much limited and expected to end within few decades. So, renewable energy resources [2-4] is increasingly being quested for as an alternative sources of energy generation because these are everlasting and eco- friendly and it has been drawn more and more attention in recent years to abridge the gap between energy demand and supply. ------------------------------------------------------------------------ * Corresponding author. http://asrjetsjournal.org/ American Scientific Research Journal for Engineering, Technology, and Sciences (ASRJETS) (2018) Volume 42, No 1, pp 284-296 285 Combined heat and power generation (CHP) system would facilitate for restructuring [5] the modern power system. In addition it helps to reduce CO2 emissions to a large extent. Nowadays decentralized CHP is a pivotal research topic for heat and power energy supply of residential buildings because of their high efficiency [6]. Small scale business and commercial facilities have been transformed to a new heights with [7] development of CHP state of art technology especially CHP in gas turbine technology. A CHP has been implemented in this report for a food distributed center and the report is divided into six sections and finally a conclusion has been drawn. 2. Energy requirements in food industry The demand of energy used in the food industry is continue to increasing with increasing world population and the food industry is the prime consumer of energy. Calculating the exact amount of energy requirement in the food sector is really very hard task but the total energy consumption in food industry is 17 % of the EU’s gross [8] energy consumption in 2013. Energy is used in food industry in three phases, initial phase is Agriculture which includes crop cultivation and animal rearing accounted for one third energy requirements. The middle phase is very crucial because it requires almost half of the energy. It has three stages such as industrial processing, logistics and packaging. In the industrial processing among traditional preservation methods, canning, freezing, and drying are considered the most energy-Intensive processing operations. Finally, slightly more than 5% energy required for the disposal of food waste. The renewable energy is being pursued all over the world as an alternative source of energy yet to be found the contribution of renewable energy in food industry is nominal compared with fossil fuels account for almost 79% of the energy consumed [8]. Huge amount of electrical energy is required for lighting and motoring equipment, energy required for making low temperature hot water which is used for washing rinsing fresh harvest before to packaging and energy required for keeping food at a desirable temperature during storage. One of the promising improvements in the food industry is that nowadays mechanical, electromagnetic, light, electrical, and other forms of energy are being used to facilitate reactions, such as inactivation of microorganisms while conventional process merely thermal energy was used [9]. 3. Energy analysis of this site 3.1 Annual Energy Consumption In order to calculate the annual energy consumption, area under the both load curve need to be calculated. Formula of calculating area of trapezium stated in equation (I) has been used in excel to determine the daily consumption of both heat and power. 𝐴𝐴𝐴𝐴𝐴𝐴𝐴𝐴 π‘œπ‘œπ‘œπ‘œ 𝑑𝑑𝐴𝐴𝐴𝐴𝑑𝑑𝐴𝐴𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑 = π‘Žπ‘Ž+𝑏𝑏 2 h (I) Where, a= base, b=base and h=height American Scientific Research Journal for Engineering, Technology, and Sciences (ASRJETS) (2018) Volume 42, No 1, pp 284-296 286 Daily heat and electricity consumption have been calculated using Microsoft excel sheet and the daily heat and electricity consumption are 50.256MWh, 32.125MWh respectively. Annual heat consumption of the site = daily heat consumption * 365 days = 50.256MWh * 365 = 18343.440MWh Annual electricity consumption of the site = daily electricity consumption * 365days = 32.125MWh * 365 = 11725.625MWh 3.2 Total energy cost Total energy cost of the site can be calculated two ways firstly by considering the (CCL) climate charge levy secondly without considering CCL. First, total oil requirements needs to be calculated to estimate to energy cost. 𝐴𝐴𝐴𝐴𝐴𝐴𝑑𝑑𝐴𝐴𝐴𝐴 β„Žπ΄π΄π΄π΄π‘‘π‘‘ π‘‘π‘‘π΄π΄π‘œπ‘œπ‘π‘π‘‘π‘‘π‘π‘π‘‘π‘‘π‘‘π‘‘π‘œπ‘œπ΄π΄ 𝑏𝑏𝑏𝑏 π‘π‘π‘œπ‘œπ‘‘π‘‘π΄π΄π΄π΄π΄π΄ = π‘‡π‘‡π‘‡π‘‡π‘‡π‘‡π‘Žπ‘Žπ‘‡π‘‡ π‘€π‘€π‘€π‘€β„Žβˆ—365 𝐡𝐡𝑇𝑇𝐡𝐡𝑇𝑇𝐡𝐡𝐡𝐡 𝐸𝐸𝐸𝐸𝐸𝐸𝐡𝐡𝐡𝐡𝐸𝐸𝐡𝐡𝐡𝐡𝐸𝐸𝐸𝐸𝐸𝐸 = 50.256*365 0.8 = 22929.3 MWh = 82545.48 GJ π‘‡π‘‡π‘œπ‘œπ‘‘π‘‘π΄π΄π΄π΄ π‘œπ‘œπ‘‘π‘‘π΄π΄ π΄π΄π΄π΄π‘Ÿπ‘Ÿπ‘‘π‘‘π‘‘π‘‘π΄π΄π΄π΄π‘π‘ = π΄π΄πΈπΈπΈπΈπ΄π΄π‘Žπ‘Žπ‘‡π‘‡ π»π»π΅π΅π‘Žπ‘Žπ‘‡π‘‡ 𝑃𝑃𝐡𝐡𝑇𝑇𝑃𝑃𝐸𝐸𝐴𝐴𝐡𝐡𝑃𝑃 𝑏𝑏𝐸𝐸 𝑏𝑏𝑇𝑇𝐡𝐡𝑇𝑇𝐡𝐡𝐡𝐡 π»π»π΅π΅π‘Žπ‘Žπ‘‡π‘‡π΅π΅πΈπΈπ»π» π‘£π‘£π‘Žπ‘Žπ‘‡π‘‡π΄π΄π΅π΅ 𝑇𝑇𝐸𝐸 𝑇𝑇𝐡𝐡𝑇𝑇 = 82545.48 𝐺𝐺𝐺𝐺 43𝐺𝐺𝐺𝐺/𝑇𝑇𝑇𝑇𝐸𝐸𝐸𝐸𝐡𝐡 = 1919.66 tonne Including CCL: Annual cost for heat energy = Amount of oil used for heating * unit price of oil = 1919.66 * 610.9 = 1,172,720.294 GBP/annum Total electricity consumption = 11725.625MWh Total electricity cost = Total electricity consumption * unit cost of electricity = 11725.625*1000kWh*0.0999 = 1,171,389.438 GBP/annum Total energy (including CCL) cost = Heat energy cost+ Electricity cost = 1,172,720.294+1,171,389.438= 2,345,109.732 GBP/annum Excluding CCL: Annual cost for heat energy = Amount of oil used for heating * unit price of oil = 1919.66 * 598.5 = 1,148,916.51 GBP/annum Total electricity consumption = 11725.625MWh American Scientific Research Journal for Engineering, Technology, and Sciences (ASRJETS) (2018) Volume 42, No 1, pp 284-296 287 Total electricity cost = Total electricity consumption * unit cost of electricity = 11725.625*1000kWh*0.0972 = 1,139,730.75 GBP/annum Total energy (excluding CCL) cost= Heat energy cost+ Electricity cost = 1,148,916.51+1,139,730.75 = 2,288,647.26 GBP/annum 3.3 Environmental Impact Yearly CO2 emission by oil combustion = Total heat consumption in kWh * Oil combustion emission factor = 22929300* 0.266 = 6099193.8 kg CO2 = 6099.194 tCO2 Annually CO2 emitted by electricity = Total electricity consumption in kWh * Electricity mix emission factor = 11725625 * 0.5 = 6097325 kgCO2 = 6097.325 tCO2 3.4 Tabular summery Table I summaries the all the energy calculation of this food industry and calculates corresponding cost of them. Table 1: Summary Of Energy Analysis Name of Calculation Parameters Value of Parameters Total energy demand of the site Heat energy 18343.440MWh Electrical energy 11725.625MWh Energy cost including CCL Heat energy cost 1,172,720.294 GBP/annum Electrical energy cost 1,171,389.438 GBP/annum Total cost 2,345,109.732 GBP/annum Energy cost excluding CCL Heat energy cost 1,148,916.51 GBP/annum Electrical energy cost 1,139,730.75 GBP/annum Total cost 2,288,647.26 GBP/annum CO2 Emission Annually CO2 emission by oil 6099.194 tCO2 Annually CO2 emission by electricity 6097.325 tCO2 4. Implementation of CHP 4.1 Possible CHP technologies American Scientific Research Journal for Engineering, Technology, and Sciences (ASRJETS) (2018) Volume 42, No 1, pp 284-296 288 There are three options of sizing of CHP system by considering heat load demand curve such as base heat load, maximum heat load where heat damping is the main concern and intermediate heat demand. Actually a suitable CHP is chosen in accordance with the meeting the heat and electrical demand of this site. In this case study, for given site heat demand curve base heat load CHP is the best suited because it’s economical merits. Operating schedule of CHP system is shown in Figure 1. If the existing boiler is replaced by CHP then the base heat load for mentioned CHP system would be 1665.7kW*0.8 or 1332.56kW where the boiler efficiency is 80%. So near 1332.56 kW of heat demand of CHP needs to be selected. Figure 1: Operating schedule of CHP system According to Natural Gas U.K. Range Guide 2013, there are many possible CHP technologies. For example, if model ENERG 1560 has been selected which provides 1662kW heat and 1558kW power output. This model has to be operated at base load but most of the time heat will be damped. It would be costly because of over size and heat damped as well. So this model is not suitable this specific site. Product reference ENEG 1560 500NOx with 1719kW heat and 1558kW Power and ENERG 1280 500NOx with 1413kW heat and 1284kW power are having the same problems. On the other hand, if ENER-G 850 500NOx is considered for this site is not large enough to provide sufficient heat and power to this site because it provides only 948kW heat and 847kW of electricity. 4.2 Suitable CHP technologies By considering all determining factors for selecting CHP, CHP model ENER-G 1160 500NOx is the best suited model for this site which provides the 1303kW heat 1162kW power output. From load profiles of this food industry is shown in Figure 1. heat demand required is 1332.56kW when CHP mode of operation is considered as a base heat load and ENER-G 1160 500NOx is the closest demand. There are no chances of heat damping as it is considered as base heat load and it is operated for 8760 hours in a year except for stoppage and maintenance only. Selected CHP would be the cheapest since the ratings of this CHP is very closest to the heat demand of this food industry. Moreover, it can be able to export some electricity to the grid. 5. CHP sizing and analysis 5.1 Selected CHP As mentioned earlier ENER-G 1160 500NOx is the best suited CHP system with the base load as mode of American Scientific Research Journal for Engineering, Technology, and Sciences (ASRJETS) (2018) Volume 42, No 1, pp 284-296 289 operation which maximize the profit. This model would be efficient and cost effective. It provides 1303kW heat 1162kW of electricity. Figure 2: Selected CHP with product reference ENER-G 1160 500NOx 5.2 Specification of selected CHP Table II provides the all information of selected CHP for example engine type of this CHP is AOE 12V4000L62 and fuel input (HHV) is 3121 kW. Table 2: Specification of selected CHP Specification Quantity or name Product reference ENER-G 1160 500NOx Electrical output kWe 1162kW Engine Manufacturer MTU Engine type AOE 12V4000L62 Aspiration type Turbocharged Output brake kWb 1200 Output jacket water kWth 660 Output exhaust gas kWth 643 Total heat output kWth 1303 Fuel input (LHV)kW 2822 Fuel input (HHV)kW 3121 Maximum operating temperature 78 degree Celsius Generator type PE734C-312 Generator efficiency 96.8% American Scientific Research Journal for Engineering, Technology, and Sciences (ASRJETS) (2018) Volume 42, No 1, pp 284-296 290 5.3 Energy saving by selected CHP Energy saving by selected CHP can easily be calculated from the following formula. If CHP is replacing the boiler, CHP (having product reference ENER-G 1160 500NOx) can save 2.893MWh energy for the same amount of energy used by the site. Energy Savings = Input fuel energy required for CHP- (Fuel energy is needed by boiler for producing heat energy + Electrical energy used from grid) = Fuel input of CHP/ kW * 8760 - (π‘˜π‘˜π‘€π‘€βˆ—π‘‡π‘‡π‘œπ‘œπ΅π΅π΅π΅π‘Žπ‘Žπ‘‡π‘‡π΅π΅πΈπΈπ»π» β„Žπ‘‡π‘‡π΄π΄π΅π΅π‘œπ‘œ 𝑏𝑏𝑇𝑇𝐡𝐡𝑇𝑇𝐡𝐡𝐡𝐡 𝐡𝐡𝐸𝐸𝐸𝐸𝐡𝐡𝐸𝐸𝐡𝐡𝐡𝐡𝐸𝐸𝐸𝐸𝐸𝐸 +π‘˜π‘˜π‘˜π‘˜ βˆ— 𝑂𝑂𝑑𝑑𝐴𝐴𝐴𝐴𝐴𝐴𝑑𝑑𝑑𝑑𝐴𝐴𝑂𝑂 π»π»π‘œπ‘œπ‘‘π‘‘π΄π΄π»π») =3121 * 8760 - ( 1303βˆ—8760 0.8 + 1162 * 8760 = 2.893MWh 5.4 Cost saving by selected CHP Capital and maintenance Cost Calculation: Capital cost = 4929x-0.151 = 4929*1162-0.151 = 1697.90 USD/kWe = 1180.042 GBP/kWe [1 USD = 0.695 GBP] Maintenance cost = 0.0752x-0.264 = 0.0752*1162-0.264 = 0.0116 USD/kWh = 0.008 GBP/kWh [1 USD = 0.695 GBP] With CCV: Annual fuel cost =Fuel input/kW * operating hours * unit cost = 3121*8760*0.02467 = 674476.813 GBP/annum Maintenance cost = kWe demand of CHP * operating hours * unit cost = 1162 * 8760*0.008 = 81432.96 GBP/annum Figure 3: Economic calculation with energy balance diagram American Scientific Research Journal for Engineering, Technology, and Sciences (ASRJETS) (2018) Volume 42, No 1, pp 284-296 291 Electricity Output by CHP = Total kWe * operating hours = 1162 * 8760 = 10179120 kWh Electricity cost savings = Total generated electrical energy * unit cost of electricity = 10179120 *0.0999 = 1016894.088 GBP/annum Heat Output = Total kW heat * operating hours = 1303 * 8760 = 11414280 kWh Gas cost savings = Total heat generated * unit cost = 11414280 *0.02467 = 281590.287 GBP/annum Annual Profit = (Total electricity cost savings + Total heat generation cost savings) – (Total CHP fuel energy cost + Maintenance cost of CHP) = (1016894.088 + 281590.287) – (674476.813 + 81432.96) = 542574.602 GBP/annum Electricity export = 95kW * 8hrs in day*365 = 277.4MWh/year Electricity surplus savings = 277.4MWh * 25GBP/MWh = 6935 GBP/annum Payback Period = πΆπΆπ‘Žπ‘Žπ‘œπ‘œπ΅π΅π‘‡π‘‡π‘Žπ‘Žπ‘‡π‘‡ πΆπΆπ‘‡π‘‡π‘œπ‘œπ‘‡π‘‡,𝐺𝐺𝐡𝐡𝑃𝑃/π‘˜π‘˜π‘€π‘€π΅π΅βˆ—π‘‡π‘‡π‘‡π‘‡π‘‡π‘‡π‘Žπ‘Žπ‘‡π‘‡ π‘˜π‘˜π‘€π‘€π΅π΅ π΄π΄πΈπΈπΈπΈπ΄π΄π‘Žπ‘Žπ‘‡π‘‡ 𝑃𝑃𝐡𝐡𝑇𝑇𝐸𝐸𝐡𝐡𝑇𝑇+𝐸𝐸𝑇𝑇𝐡𝐡𝐸𝐸𝑇𝑇𝐡𝐡𝐡𝐡𝐸𝐸𝐡𝐡𝑇𝑇𝐸𝐸 π‘†π‘†π΄π΄π΅π΅π‘œπ‘œπ‘‡π‘‡π΄π΄π‘œπ‘œ = 1180.042βˆ—1162 542574.602+6935 = 2.50 years Without CCL: Annual fuel cost =Fuel input/kW * operating hours * unit cost = 3121*8760*0.02339 = 639481.664 GBP/annum Maintenance cost = kWe demand of CHP * operating hours * unit cost = 1162 * 8760*0.008 = 81432.96 GBP/annum Electricity Output by CHP = Total kWe * operating hours = 1162 * 8760 = 10179120 kWh Electricity cost savings = Total generated electrical energy * unit cost of electricity = 10179120 *0.0972 = 989410.464 GBP/annum American Scientific Research Journal for Engineering, Technology, and Sciences (ASRJETS) (2018) Volume 42, No 1, pp 284-296 292 Heat Output = kW heat demand * operating hours = 1303 * 8760 = 11414280 kWh Gas cost savings = Total heat generated * unit cost = 11414280 *0.02339 = 266980.009 GBP/annum Annual Profit = (Total electricity cost savings + Total heat generation cost savings) – (Total CHP fuel energy cost + Maintenance cost of CHP) = (989410.464 + 266980.009) – (639481.664 + 81432.96) = 535475.849 GBP/annum Electricity export = 95kW * 8hrs in day*365 = 277.4MWh/year Electricity surplus savings = 277.4MWh * 25GBP/MWh = 6935 GBP/annum Payback Period = πΆπΆπ‘Žπ‘Žπ‘œπ‘œπ΅π΅π‘‡π‘‡π‘Žπ‘Žπ‘‡π‘‡ πΆπΆπ‘‡π‘‡π‘œπ‘œπ‘‡π‘‡,𝐺𝐺𝐡𝐡𝑃𝑃/π‘˜π‘˜π‘€π‘€π΅π΅βˆ—π‘‡π‘‡π‘‡π‘‡π‘‡π‘‡π‘Žπ‘Žπ‘‡π‘‡ π‘˜π‘˜π‘€π‘€π΅π΅ π΄π΄πΈπΈπΈπΈπ΄π΄π‘Žπ‘Žπ‘‡π‘‡ 𝑃𝑃𝐡𝐡𝑇𝑇𝐸𝐸𝐡𝐡𝑇𝑇+𝐸𝐸𝑇𝑇𝐡𝐡𝐸𝐸𝑇𝑇𝐡𝐡𝐡𝐡𝐸𝐸𝐡𝐡𝑇𝑇𝐸𝐸 π‘†π‘†π΄π΄π΅π΅π‘œπ‘œπ‘‡π‘‡π΄π΄π‘œπ‘œ = 1180.042βˆ—1162 535475.849 +6935 = 2.52 years. Payback period increased without Carbon Change Levy (CCV) by 0.02 2.50 or 0.8%.Figure 3. illustrates the economic calculations with the help of energy balance diagram and Figure 4 depicts the some hour of the day can export power the gird. Figure 4: Electricity export to the grid 5.5 Measuring Factors for Good Quality CHP Quality Index (QI) and electrical power efficiency (πœ‚πœ‚π΅π΅) are the threshold criteria for determining the good CHP under normal operating condition. Quality Index (QI) is very crucial while sizing the CHP as it reflects energy efficiency and environmental performance of the scheme. For upgraded and new CHP system the minimum requirements of is QI>105 needs to be obtained. American Scientific Research Journal for Engineering, Technology, and Sciences (ASRJETS) (2018) Volume 42, No 1, pp 284-296 293 Quality Index (QI) is calculated by the following formula: 𝑄𝑄𝑄𝑄 = π‘‹π‘‹πœ‚πœ‚π΅π΅ + π‘Œπ‘Œπœ‚πœ‚β„Ž (II) where, X = Power supply coefficient, related to the alternative power supply option. Y= Heat generation coefficient, related to the alternative heat supply option. From quality index chart, value of X and Y are easily determined since it is less then 1MWe system. So the QI equation for this system is 𝑄𝑄𝑄𝑄 = 249πœ‚πœ‚π΅π΅ + 115Ξ·h (III) Power Efficiency, πœ‚πœ‚π΅π΅ = 𝑃𝑃𝑒𝑒 𝑄𝑄𝐢𝐢𝐢𝐢𝐢𝐢 = 1162 3121 βˆ— 100 = 0.3723 = 37.23% Heat Efficiency, πœ‚πœ‚β„Ž = π‘„π‘„β„Ž 𝑄𝑄𝐢𝐢𝐢𝐢𝐢𝐢 = 1303 3121 βˆ— 100 = 0.4125 = 41.25% 𝑄𝑄𝑄𝑄 = 249πœ‚πœ‚π΅π΅ + 115πœ‚πœ‚β„Ž = 249 βˆ— 0.3723 + 115 βˆ— 0.4125 = 140.14 So, the Quality Index (QI) this site is well above the threshold. And power efficiency (πœ‚πœ‚π΅π΅) must be greater or equal to 20% in order to meet requirements to be good quality CHP. The electrical efficiency measured by the total electrical energy output divided by total fuel input in the system. Power Efficiency, πœ‚πœ‚π΅π΅ = 𝑃𝑃𝑒𝑒 𝑄𝑄𝐢𝐢𝐢𝐢𝐢𝐢 = 1162 3121 βˆ— 100 = 0.3723 = 37.23% > 20% . So the given system have been fulfilled the power performance criteria. This CHP system is qualify for government financial support (CCL, Capital enhanced allowance, ROC, etc) as it maintains all standard for being good quality CHP. 5.6 Cost of unit of CO2 emission Unit cost of CO2 emission reduction (Β£/kgCO2 saved) has been calculated in the following calculations. CO2 emission reduction = (CO2 emission by boiler + CO2 emission by power station) - CO2 emission by CHP system = (6200194 + 6191276) – (3121*8760*0.2) = 12391470 – 5467992 = 6923478 kg CO2 Annual savings from CHP system including CCV = 542574.588 GBP/annum So Unit cost of CO2 emission reduction = 542574.588 6923478 = 0.0079 𝐺𝐺𝐺𝐺𝐺𝐺/kgCO2 saved American Scientific Research Journal for Engineering, Technology, and Sciences (ASRJETS) (2018) Volume 42, No 1, pp 284-296 294 Table III depicts all the calculation regarding the CO2 emission. Table 2: CO2 emission details Description Measurements CO2 emission by boiler 6200194 kg CO2 CO2 emission by power station 6191276 kg CO2 CO2 emission by CHP system 5467992 kg CO2 CO2 emission save 6923478 kg CO2 Unit cost of CO2 emission save 0.79 /kg CO2 save 6. Discussion and analysis Table IV and Table V provides the information about the CHP plant characteristics and return calculations respectively. Table 2: CHP plant operating characteristics Parameters Value of parameters Fuel input 3121 kW Heat output 1303 kW Electricity output 1162kW Losses 656 kW CHP daily operating hours 24hrs Availability 100% Maintenance cost 81432.86 GBP/annum Electrical efficiency 37.2% Thermal efficiency 41.74% Overall efficiency 79% Capital cost 1180.042 GBP/kWe Boiler efficiency 80% Annual operations hours 8760 Gas combustion emission factor 0.2 kg/kWh It is really worth mentioning the return of this investment in only 2.5 years American Scientific Research Journal for Engineering, Technology, and Sciences (ASRJETS) (2018) Volume 42, No 1, pp 284-296 295 Table 2: CHP plant operating characteristics Calculation Parameters Value of parameters Energy savings Total gas input 27339960 kWh Displaced boiler fuel energy 14267850 kWh Energy savings 2.893MWh CHP plant operating cost CHP fuel cost (CCL) 674476.813 GBP/annum Maintenance cost 81432.96 GBP/annum Total CHP plant operating cost 755909.773 GBP/ annum Cost savings Gas cost save 281590.287 GBP/annum Electricity cost save 1016894.088 GBP/annum Annual profit 542574.602 GBP/annum Return Capital cost 1371208.804 GBP/anm Electricity export 6935 GBP/annum Payback period 2.5 years 7. Conclusion Some key aspects need to be considered while selecting any CHP system such as technical, commercial or business and environmental consideration. Above mentioned CHP is the best suited for all respect because it is well performed CHP systems. Moreover, it reduces energy input to a large extent in contrast with conventional boiler for the same amount of energy supplied to the system. In addition, it is really worth noting that return of this investment will be given only 2.50 years. Finally, this CHP helps to reduce the GHG emission to a great degree once CHP has been opted for this food industry. In recapitulate, with considering all the merits I would recommend it in company’s board and I strongly believe that investor will go for it. References [1] F. Blaabjerg, C. Zhe, and S. B. Kjaer, "Power electronics as efficient interface in dispersed power generation systems," IEEE Transactions on Power Electronics, vol. 19, pp. 1184-1194, 2004. [2] J. M. Carrasco, L. G. Franquelo, J. T. Bialasiewicz, E. Galvan, R. C. PortilloGuisado, M. A. M. Prats, et al., "Power-Electronic Systems for the Grid Integration of Renewable Energy Sources: A Survey," IEEE Transactions on Industrial Electronics, vol. 53, pp. 1002-1016, 2006. [3] Z. Liang, R. Guo, J. Li, and A. Q. Huang, "A High-Efficiency PV Module-Integrated DC/DC Converter for PV Energy Harvest in FREEDM Systems," IEEE Transactions on Power Electronics, vol. 26, pp. 897-909, 2011. American Scientific Research Journal for Engineering, Technology, and Sciences (ASRJETS) (2018) Volume 42, No 1, pp 284-296 296 [4] N. R. Tummuru, M. K. Mishra, and S. Srinivas, "An Improved Current Controller for Grid Connected Voltage Source Converter in Microgrid Applications," IEEE Transactions on Sustainable Energy, vol. 6, pp. 595-605, 2015. [5] O. A. Shaneb and P. C. Taylor, "An evaluation of integrated fuel cell and energy storage systems for residential applications," in Universities Power Engineering Conference (UPEC), 2009 Proceedings of the 44th International, 2009, pp. 1-5. [6] M. Pielke and M. Kurrat, "Potentials for asset optimizations in low and medium voltage networks through grid oriented feeding of distributed generation," in 2008 IEEE/PES Transmission and Distribution Conference and Exposition, 2008, pp. 1-7. [7] R. Dettmer, "Wind of change [gas turbine based CHP]," IEE Review, vol. 46, pp. 21-24, 2000. [8] F. Monforti-Ferrario, J. Dallemand, I. P. Pascua, V. Motola, M. Banja, N. Scarlat, et al., "Energy use in the EU food sector: State of play and opportunities for improvement," 2015. [9] O. Rodriguez‐Gonzalez, R. Buckow, T. Koutchma, and V. Balasubramaniam, "Energy Requirements for Alternative Food Processing Technologiesβ€”Principles, Assumptions, and Evaluation of Efficiency," Comprehensive Reviews in Food Science and Food Safety, vol. 14, pp. 536-554, 2015. Md Jabed Hossaina*, Shuva Mitrab, Raihan Uddin Ahmedc