Int. Journal of Renewable Energy Development 6 (2) 2017: P a g e 181. Int. Journal of Renewable Energy Development (IJRED)

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1 P a g e 181 Contents lst avalable at IJRED webste Int. Journal of Renewable Energy Development (IJRED) Journal homepage: Modelng and Analyss of Solar Photovoltac Asssted Electrolyzer-Polymer Electrolyte Membrane Fuel Cell For Runnng a Hosptal n Remote Area n Kolkata, Inda Kamaljyot Talukdar a* a Department of Mechancal Engneerng, Bneswar Brahma Engneerng College,Kokrajhar Assam,Inda ABSTRACT. The present work conssts of the modelng and analyss of solar photovoltac panels ntegrated wth electrolyzer bank and Polymer Electrolyte Membrane (PEM) fuel cell stacks for runnng dfferent applances of a hosptal located n Kolkata for dfferent clmatc condtons. Electrc power s generated by an array of solar photovoltac modules. Excess energy after meetng the requrements of the hosptal durng peak sunshne hours s suppled to an electrolyzer bank to generate hydrogen gas, whch s consumed by the PEM fuel cell stack to support the power requrement durng the energy defct hours. The study reveals that 875 solar photovoltac modules n parallel each havng 2 modules n seres of Central Electroncs Lmted Make PM 150 wth a kw electrolyzer and 27 PEM fuel cell stacks, each of W, can support the energy requrement of a 200 lghts (100 W each), 4 pumps (2 kw each), 120 fans(65 W each) and 5 refrgerators (2 kw each)system operated for 16 hours, 2 hours,15 hours and 24 hours respectvely. 123 solar photovoltac modules n parallel each havng 2 modules n seres of Central Electroncs Lmted Make PM 150 s needed to run the gas compressor for storng hydrogen n the cylnder durng sunshne hours. Keywords: Central Electroncs Lmted, Electrolyzer, PEM, PM 150, Solar photovoltac. Artcle Hstory: Receved Feb 5 th 2017; Receved n revsed form June 2 nd 2017; Accepted June 28 th 2017; Avalable onlne How to Cte Ths Artcle: Talukdar, K. (2017). Modelng and Analyss of Solar Photovoltac Asssted Electrolyzer-Polymer Electrolyte Membrane Fuel Cell For Runnng a Hosptal n Remote Area n Kolkata,Inda. Internatonal Journal of Renewable Energy Development, 6(2), Introducton Demand for electrcty and the standard of lvng are ncreasng day by day. However, power n the form of electrcty s not avalable n plenty of remote areas lke vllages. Many people have worked for provdng power and useful technology to remote areas and areas where power s not easly avalable. Chow et al (2006) developed hybrd PT (photovoltac-thermal) technology usng water as the coolant n order to mprove the energy performance of the photovoltac system n resdental areas. Nfah et al (2008) smulated off-grd generaton optons for remote vllages n Cameroon usng a load of 110 kwh/day and 12 kwp. Chaurey & Kandpal (2010) used solar home systems for provdng basc electrcty servces to rural households that are not connected to electrcty grd. Elhaddy (2002) analysed hourly wnd-speed and solar radaton measurements made at the solar radaton and meteorologcal montorng staton, Dhahran (26 32 N, E), Saud Araba, to nvestgate the feasblty of usng hybrd (wnd+solar+desel) energy converson systems at Dhahran n order to meet the energy needs of 22-bedroom houses. Smlarly authors n reference (Nfah et al. 2007; Wes et al. 2005; Al Suleman &Narb 2000; Manolakos et al. 2001; Zha et al. 2009; Beck 2007; Saheb-Koussa et al. 2009; Nfah & Ngundam 2008) used dfferent technologes and powerng of applances n dfferent remote areas. Hosptal s very mportant for people snce many vllages do not have hosptal. If the vllage has, t s not havng proper facltes lke electrcty. So f * Correspondng Author: kamaljyot.talukdar@gmal.com Phone: IJRED ISSN: , 15 th July 2017, All rghts reserved

2 Ctaton: Talukdar, K. (2017). Modelng and Analyss of Solar Photovoltac Asssted Electrolyzer-Polymer Electrolyte Membrane Fuel Cell For Runnng a Hosptal n Remote Area n Kolkata, Inda. Int. Journal of Renewable Energy Development, 6(2), , P a g e 182 somehow electrcty can be suppled to hosptal n remote vllages, vllage people could be cured wthout gong to town or cty. New technologes can be used for assstng the functonng of hosptals. Yoshda et al (2007) used ratonal method to determne the system structure and operatonal strateges for the energy supply system for a hosptal based on the optmzaton approach. Paksoy et al (2000) desgned a system usng solar energy n combnaton wth Aqufer Thermal Energy Storage (ATES) that conserved a major part of the ol and electrcty used for heatng or coolng the Cukurova Unversty, Balcal Hosptal n Adana, Turkey. Smlarly, authors n references (Bzzarr & Morn 2004; Bzzarr & Morn 2006; Al-Karaghoul & Kazmersk 2010) used dfferent technologes for runnng and assstng hosptals. The present work n ths paper deals wth the use of solar photovoltac system asssted PEM electrolyzer fuel cell for powerng a hosptal. Many works on fuel cell applcaton and solar hydrogen systems had been done. Wu et al (2005) presented an ntegrated system framework for fuel cell-based dstrbuted energy applcatons. ezroglu & Macaro (2011) hghlghted some of the research and developmental work, whch had occurred n the past fve years on fuel cell vehcle technology, wth a focus on economc and envronmental concerns. Smlarly, authors n references (Kelly et al 2011; Sols et al 2010; Dorer et al 2005; Hawkes et al 2006; El-Shatter et al 2002; Shapro et al 2005; Gall & Stefanon 1997; Uzunoglu et al 2009; Barbr 2005; Kelly et al 2008; Zervas et al 2008) used dfferent technologes based on fuel cells for useful and benefcal purposes. From the mentoned revews a consderable work of powerng remote areas, powerng health clncs and on fuel cell has been done,yet no work on powerng health clnc by usng solar photovoltac ntegrated wth electrolyzer PEM fuel cell has been done. Solar Radaton (G) Solar Radaton (G) Photovoltac modules Photovoltac modules mm I G IP Inverter Charge Controller IP-IH PEM Electrolyzer Gas storage PEM fuel cell stack IH Inverter IH-IP Hosptal Fg.1. Schematc vew of proposed ntegrated confguraton system. IJRED ISSN: , 15 th July 2017, All rghts reserved

3 P a g e Descrpton of combned solar photovoltac asssted electrolyser-pem (polymer electrolyte membrane) fuel cell The system confguraton conssts of solar photovoltac modules, charge controller, PEM electrolyzer, gas storage cylnder, PEM fuel cell stacks and two nverters as shown n Fg.1. When enough sunlght s avalable, sun rays fall on solar photovoltac modules and generate current IP. Some amount of current requred for hosptal (IH) goes through an nverter to operate varous applances of the hosptal. The excess current (IP-IH) after meetng the requrements of the hosptal goes to PEM electrolyzer. In electrolyzer water s present whch gets dssocated nto hydrogen and oxygen. The hydrogen gas generated n electrolyzer s stored n gas compressor. For pressurzaton of the hydrogen gas owng to low mass densty, whch requres a very large storage tank, the compressor derves ts electrcal energy (IG) from solar photovoltac modules and operates only when electrolyzer s n operaton. When enough sunshne s not avalable.e. defcent current (IH-IP) comes from the PEM fuel cell stack. The hydrogen requred for runnng the fuel cell s obtaned from gas storage cylnder whch gets stored durng suffcent solar radaton from the electrolyzer. 3. Modelng 3.1 Modelng of solar photovoltac system The electrcal energy was generated by harnessng solar energy usng photovoltac modules. In the present work Central Electroncs Lmted Make PM- 150 (Solar photovoltac modules pm ) solar photovoltac module has been used. The sngle cell termnal current s gven by (Chenn et al 2007): P (1) L L D s the lght current generated by a solar cell as a functon of solar radaton (G) and current. D s the dode The lght current generated from a photovoltac module at any gven ntensty of solar radaton and temperature s gven by (Chenn et al 2007): L G scref sc T mod ule Tmod uleref (2) G ref G, Gref s the solar radaton at actual (Twar 2004) and reference condton (1000 W/m 2 ) (Solar photovoltac modules pm ) respectvely, scref -short crcut current at reference condton(a)(solar photovoltac modules pm ), sc -manufacturer suppled temperature coeffcent of short crcut current(a/k) (Solar photovoltac modules pm ), T mod ule and T mod uleref module temperature at actual and at reference condton(k)(solar photovoltac modules pm ). The module temperature s a functon of ambent temperature ( ), wnd speed ( ) and solar T ambent radaton(g) and gven by (Chenn et al 2007): T mod ule ( K ) (0.943T ambent 0.028G v f 4.3) , 2004), T ambent v f v f (3) s n 0 C(Twar 2004),G n W/m 2 (Twar -wnd speed n m/s(wnd speed n Kolkata,West Bengal ,Inda 2014). The dode current n equaton (1) s a functon of reverse saturaton current and gven by(chenn et al.2007): D q( P Rs ) sat exp 1 ktmod ule sat charge(1.6 x C), (4) - reverse saturaton current(a), q -electron -termnal voltage(), seres resstance, -shape factor, k -Boltzamann constant(1.38 x J/K). sat (5) satref T T 3 mod ule 1 1 mod uleref q G exp ka T A-completon factor, (1.12e for S), and satref scref mod uleref G T mod ule R S -materal bandgap q ocref exp (6) k Tmod uleref ocref -open crcut voltage at reference condton (Solar photovoltac modules pm ). s taken from Chenn et al (2007). sat, sarref Shape factor ( ) whch s a measure of cell mperfecton s gven by Chenn et al (2007): A NCS (7) N S - IJRED ISSN: , 15 th July 2017, All rghts reserved

4 Ctaton: Talukdar, K. (2017). Modelng and Analyss of Solar Photovoltac Asssted Electrolyzer-Polymer Electrolyte Membrane Fuel Cell For Runnng a Hosptal n Remote Area n Kolkata, Inda. Int. Journal of Renewable Energy Development, 6(2), , P a g e 184 A, NCS, N S s completon factor, number of cells connected n seres n a sngle module (specfed by manufacturer of the module) and number of modules connected n seres of the entre photovoltac array respectvely. array (consdered 48 n present study) and s the voltage obtaned from sngle module. mod ule Table 1 shows the specfcaton of varous equpment used n the hosptal. N S system (8) mod ule system s the system voltage of the photovoltac Table 1 Operatng load parameters of combned P and electrolyzer-pem fuel cell system Equpments(o) No. of tems(n) Wattage(P)(n W) Operatng hours(t) Lghts Pump Fans Refrgerator The total daly electrcal load (Ah)( o )due to operaton of equpments mentoned n table 1 s gven by: O n PO t (9) PF system o- electrcal load of an equpment, Po-power ratng of an equpment, t-operatng hours of an equpment and n-number of tems, PF-power factor (consdered 0.85). The total daly electrcal load(ah)( ) consstng total of lghts, pumps, fans and refrgerator can be gven as: total o (10) nverter nverter -nverter effcency (0.85) The desgn current requred from photovoltac array( spv ) s gven by(ganguly et al. 2010): spv total DF (11) peaksunshnehours ch arg econtroller s gven by: N p spv mp (12) mp s the maxmum current avalable from sngle module under peak power condton(solar photovoltac modules pm ) Net current from solar P array s: array N (13) pv 3.2 Modellng of PEM fuel cell p Table 2 shows the nput parameters used for modellng fuel cell. Table 2 Input parameters of fuel cell Model Fuel cell Parameter Exchange current densty(h 2) Charge transfer coeffcent of reacton alue 10-4 A/cm 2 (Hayre et al.2006) 0.5 (Hayre et al.2006) Cell effectve area 100 cm 2 (Pal 2004) Operatng current densty 0.1 A/cm 2 (Pal 2004) DF s the de-ratng factor of photovoltac module (Telecommuncaton Engneerng Centre (TEC), New Delh 2011) s 1.25, s ch arg econtrolle r charge controller effcency (Telecommuncaton Engneerng Centre (TEC), New Delh 2011) s 0.85, peak sunshne hours s consdered 7 hours per day(patra & Datta 2009). Number of P modules connected n parallel (Np) The net voltage ( by(ganguly et al. 2010): fc ) of a PEM fuel cell s gven fc nerst actvaton ohmc concentraton (14) IJRED ISSN: , 15 th July 2017, All rghts reserved

5 P a g e 185 Nerst potental ( nerst Ganguly et al (2010): nerst o rev ) of PEM fuel cell s gven by 0.5 RT ph p 2 O2 ln (15) nf p H2O o rev s the reference reversble potental, T s fuel cell operatng temperature (60 o C n the present study), F s Faraday constant (96500 C/mole), p s the partal pressure of the gases(pa), -unversal gas constant (8.314J/mole. K). Actvaton voltage( ) s gven by Tafel actvaton equaton (Hayre et al. 2006): actvaton RT j ln nf j fc o R (16) s the charge transfer coeffcent of the reacton (Hayre et al. 2006), j fc and j o beng operatng current densty of fuel cell stack and exchange current densty respectvely. Ohmc voltage ( ) s gven by (Gangly et al. 2010): ohmc j fc ohmc R (17) R s the resstance of the polymer membrane (Nafon 117 type) whch s gven by (Ganguly et al. 2010): u fc R (18) fc u fc s the thckness of Nafon 117 membrane (Nafon membranes-fuel cell Etc. 2016), fc s the conductvty of Nafon 117 membrane dependng on water content ( ) and fuel cell operatng temperature (T) gven by (Kandlkar & Lu 2009): 1 1 fc exp1268 (19) 303 T RT jl jfc concentraton ln (21) nf jl j s lmtng current densty of fuel cell l and gven by (Ganguly et al. 2010): nfdcb jl (22) D s the effectve reactant dffusvty wthn catalyst layer havng typcal value 10-2 cm 2 /s (Hayre et al. 2006), s the electrode(dffuson layer) thckness whose value ranges from µm (Hayre et al. 2006). CB s the bulk (flow channel) concentraton of the reactant gven by (Bhagat & Dhoble 2007): ph 2 C B (23) R T m m H 2 H 2 s the mass of hydrogen. Peak hourly current requrement from fuel cell stack ( ) s gven by: fuelcell fuelcell peakloadcurrent (24) ch arg econtroller In Equaton 24 peak load current means the maxmum current requrement at any hour durng non sunshne hours.e from 1:00 am to 5:00 am and 7:00pm to 1:00 am. Number of PEM fuel cell stacks n parallel N ) can be obtaned as shown: ( fcparallel fuelcell N fcparallel (25) cell cell s the current generated by sngle fuel cell, whch can be obtaned from effectve area of each cell, and fuel cell operatng current densty. N s the fcseres number of fuel cell connected n seres and s gven by: system N fcseres (26) fc The hourly hydrogen consumpton of a fuel cell stack ( m fc ) at desgn load s gven by (Ganguly et al 2010): And ( T ) (20) m fc fuelcell N fcseres 2 F fuel (27) Concentraton voltage ( Ganguly et al. (2010): concentrat on ) s gven by fuel -fuel utlzaton factor n fuel cell (consdered 0.9) IJRED ISSN: , 15 th July 2017, All rghts reserved

6 Ctaton: Talukdar, K. (2017). Modelng and Analyss of Solar Photovoltac Asssted Electrolyzer-Polymer Electrolyte Membrane Fuel Cell For Runnng a Hosptal n Remote Area n Kolkata, Inda. Int. Journal of Renewable Energy Development, 6(2), , P a g e Modelng of PEM electrolyzer In electrolyzer excess current after meetng the requrements of the hosptal s used for dssocatng water nto hydrogen and oxygen gas. Table 3 shows the varous nput parameters used for modelng electrolyzer. Table 3 Lst of nput parameters of electrolyzer Model Parameter alue Electrolyzer Number of cells n stack(n seres) 24 Cell area 86.4cm 2 (Dale et al.2008) Maxmum current densty 1.6 A/cm 2 (Dale et al.2008) Dry thckness of membrane 178µm(Dale et al.2008) Table 4 Lst of nput parameters of hydrogen compressor Model Parameter alue Isentropc effcency 0.7(L et al. 2009) Hydrogen compressor Specfc heat of hydrogen at constant pressure(cp) kj/kg.k(l et al. 2009) Ext pressure 200 bar(l et al. 2009) The electrolyzer electrcal effcency ( defned as the product of the current effcency( voltage effcency( elec voltage voltage elec ) gven as(l et al. 2009): (28) current effcency ( ) s )and ) vares wth the current passng through the electrolyzer cells (Ipv-IH) and gven by(l et al. 2009): exp (29) ( I ) 2 pv I H ( I P I H ) The voltage effcency s assumed to be 74 %(L et al. 2009). Amount of hydrogen produced (n gm mol) n electrolyzer wth Nelec (number of cell n seres) n one hour s gven by (L et al. 2009). ( I pv IH ) Nelec Melec elec 3600 (30) 2F 3.4 Modellng of gas compressor Hydrogen gas produced n electrolyzer needs to be compressed. For compressng the hydrogen gas energy.e current s obtaned from solar photovoltac modules ntegrated wth nverter as shown n fg.1. Table 4 shows the varous nput parameters used for modelng gas compressor. The power requred to run the gas compressor s gven by (L et al. 2009): W C m H 2 C m H2 compressor, C p T1 P 2 P1 1 y 1 (31) -mass flow rate of hydrogen gas n C p -specfc heat of hydrogen at constant pressure, T1-gas temperature at compressor nlet, P1and P2-nlet and ext pressure of hydrogen gas at entry and ext of compressor respectvely, -sentropc effcency of C compressor, -sentropc exponent of hydrogen(1.4). Current requred for runnng the gas compressor ( compressor ) s gven by: 18 WC, t compressor (32) PF where W C, t 18:00 hours. compressortotal t6 system -compressor power ratng from 6 hours to compressor (33) nverter The desgn current requred from photovoltac array (spv) gven by: spv compressortotal DF peaksunshnehours (34) Number of photovoltac modules needed for runnng the gas compressor ( ) s gven by: N, p compressor IJRED ISSN: , 15 th July 2017, All rghts reserved

7 P a g e 187 N p, compressor spv mp 4. Results and Dscusson (35) A numercal code n C was developed for smulatng the requred combnaton of solar photovoltac asssted electrolyzer PEM fuel cell for runnng a hosptal. Table 5 shows dfferent applances operated at dfferent hours of a day for all the months.e. March, May, September and December. Table 5 Assumed load pattern of applances Tme span of Nature of load day 12AM-7AM 7AM-9AM 9AM-5PM 5PM-10PM 10PM-12AM 200 lghts+5 refrgerators 200 lghts+4 pumps+120 fans+5 refrgerators 120 fans+5 refrgerators 200 lghts+120 fans+5 refrgerators 200 lghts+5 refrgerators The ratngs of dfferent power system components are gven n Table 6. In Table 6 t s seen that number of photovoltac modules n parallel s 875 whch s obtaned from equaton 2 where spv total s and mp s 4.8 A. Number of modules n seres s gven by equaton 8 where system s 48 and module s the maxmum voltage from a gven module beng 34. Electrolyzer nput at 48 s kw whch s taken at 12:00 hours (maxmum radaton n a day) for the month of May because month May has the hghest solar radaton and electrolyzer nput wll be maxmum due to greater producton of hydrogen by electrolyzer, hence electrolyzer whch works well n May wll work well throughout the year. The number of fuel cells n a stack n seres s 47 s gven by equaton no.26 where fc s gven by equaton no.14 s The number of fuel cell n stacks n parallel s gven by equaton no.24 and 25.In equaton no.24 peak load current durng non-sunshne hours s A whch s between 17:00 hours to 22:00 hours. cell s the current obtaned from parameters gven n Table no. 2. The maxmum output of each fuel cells stack n seres s A and power of each fuel cell stack s gven by product of 48 and A whch s W. Gas compressor ratng at 48 (14.234kW) s gven by equaton 31 and s taken from the month of May at 12:00 hours because at ths tme the hydrogen producton s maxmum ( gm.mol) and consumpton of power by gas compressor to compress large hydrogen generated by electrolyzer s maxmum, Hence gas compressor f t works well n ths tme and t can work well also throughout the year. The number of photovoltac modules n parallel for operatng the gas compressor s gven by equaton 35. The total spv current for the gas compressor s Ah and number of photovoltac modules n parallel needed s obtaned by dvdng Ah by mp. Current spv for the gas compressor s taken for the month of May due to the fact that month May has hghest solar radaton, hence t wll need a more current and more number of photovoltac modules for generatng current to compress a large amount of hydrogen generated by electrolyzer n the month of May. The number of modules n seres s obtaned by the same method as equaton 8. Fg. 2, 4, 6, 8 shows the hourly current consumpton (load current Ah) throughout the day for runnng the applances of the hosptal by usng equaton 11. In all the fgures t s seen that current consumed n Ah from 10 PM to 7 AM s Ah per hour. Smlarly, current consumed from 7 AM to 9AM s Ah per hour, 9 AM to 5 PM s Ah per hour, 5 PM to10 PM s Ah per hour. The current consumpton wll be same for all the months due to the operaton of the same number of equpments for the same number of hours shown n Table 5 for all the dfferent months.e. March, May, September, and December. Solar photovoltac (SP) current generated durng sunshne hours (6:00hours to18:00hours) n Fgures 2,4,6,and 8 from the photovoltac array for the months.e. March, May, September, and December s obtaned from equaton 13. It was observed that the trend of SP current generated ncreases from 6:00 hours to 12:00 hours and agan decreases to 18:00 hours because solar radaton ncreases from 6:00 hours to 12:00 hours and agan decreases to 18:00 hours. Table 6 Ratng of power system components Components of power system Ratng No. of photovoltac modules n parallel(np) 875 No. of photovoltac modules s seres(ns) 2 Electrolyzer nput at kw No. of fuel cell n a stack(nfcseres) 47 No. of fuel cells stacks(nfcparallel) 27 Maxmum output of each fuel cell stack Gas compressor ratng at 48 No. of photovoltac modules n parallel for gas compressor(np,compressor) No. of photovoltac modules n seres for gas compressor 7.966A, W kw 123 Based on the analyss of Fgures 2, 4, 6, and 8 t s seen that months March and September have the same pattern of SP power generaton due to the same amount of solar radaton values from 6:00 hours to 18:00 hours. Month May has hghest SP power generaton due to the avalablty of maxmum solar radaton n a year. Month December has lowest 2 IJRED ISSN: , 15 th July 2017, All rghts reserved

8 Ctaton: Talukdar, K. (2017). Modelng and Analyss of Solar Photovoltac Asssted Electrolyzer-Polymer Electrolyte Membrane Fuel Cell For Runnng a Hosptal n Remote Area n Kolkata, Inda. Int. Journal of Renewable Energy Development, 6(2), , P a g e 188 SP power generaton due to the avalablty of lowest solar radaton n a year. The SP power generated s almost same at 6:00 hours and 18:00 hours n fgures 2, 4, 6, and 8 due to the same value of solar radaton at 6:00 hours and 18:00 hours. The solar radaton data s taken from Twar (2004). the types of equpment operated n gven hours shown n Table 5. Hydrogen consumpton(gm mole/hour) s same for all the months due to the reason mentoned earler by fuel cell stacks durng non-sunshne hours usng equaton no. 27.e. from 22:00hours-5:00hours s gm mole/hour and 19:00hours-22:00hours s gm mole/hour. Fgs. 3, 5, 7, 9 also shows hydrogen producton (gm mole/hour) usng equaton no. 30 by electrolyzer from the current generated by photovoltac modules durng sunshne hours(.e. from 6:00 hours to 18:00 hours).it s seen that hydrogen producton ncreases from 6:00 hours to 12:00 hours and decreases to 18:00 hours. It s due to the fact that solar radaton ncreases from 6:00 hours to 12:00 hours and agan decreases to 18:00 hours. Thus more solar radaton means more amount of current beng generated by utlzng to produce more hydrogen by gven electrolyzer after meetng the hosptal s current requrements. Fg.2 Electrcal load varaton for the month of March Fg.5 Hydrogen consumpton and producton pattern for the month of May Fg.3 Hydrogen consumpton and producton pattern for the month of March Fg.6 Electrcal load varaton for the month of September Fg.4 Electrcal load varaton for the month of May. In Fgs. 3, 5, 7, 9 shows hydrogen consumpton (gm mole/hour) by fuel cell stacks whch are dependent on Based on the analyss of fgures3, 5,7, and 9 t s seen that months March and September have the same pattern of hydrogen generaton due to the same reason mentoned earler n Fgs. 2,4,6,and 8 for SP power generaton. Month May has hghest hydrogen generaton and month December has lowest hydrogen generaton due to the same reason mentoned n Fgs. IJRED ISSN: , 15 th July 2017, All rghts reserved

9 P a g e 189 2, 4, 6 and 8 for SP power generaton. It s also seen that hydrogen producton s less at 18:00 hours compared to 6:00 hours due to the greater amount of current consumed from 17:00 hours to 22:00 hours whch s Ah per hour by the hosptal as dscussed earler, hence less amount of current s avalable to electrolyzer for hydrogen producton. The cumulatve daylong hydrogen generaton n electrolyzer s summaton of hydrogen generated from 6:00 hours to 18:00 hours and cumulatve consumpton of hydrogen n fuel cell stacks s the summaton of hydrogen consumpton durng nonsunshne hours from 19:00 hours to 5:00 hours for dfferent months representng dfferent seasons of a year s shown n Table 7. Table 7 Cumulatve day long gas generaton and consumpton n dfferent months Month Fg.7 Hydrogen consumpton and producton pattern for the month of September Cumulatve daylong H2 generaton(gm mol) Cumulatve daylong H2 consumpton(gm mol) March May Sept Dec It can be seen that cumulatve day long hydrogen consumpton s same for all the four months due to operaton of same number of equpments for same defnte hours throughout the year. Fg.8 Electrcal load varaton for the month of December 5. Concluson In the present work applances of a hosptal located n a remote area n Kolkata s operated wth the ntegrated system of solar photovoltac and electrolyzer-polymer electrolyte membrane fuel cell. It s seen that cumulatve hydrogen generaton n electrolyzer s more than hydrogen consumpton n PEM fuel cell stack of four dfferent months of a year. A total of 875 solar photovoltac modules n parallel, 2 modules n seres of Central Electroncs Lmted Make PM 150 wth a kw electrolyzer and 27 PEM fuel cell stacks, each of W can support the energy requrement of a 200 lghts (100 W each), 4 pumps (2 kw each), 120 fans (65 W each) and 5 refrgerators(2 kw each)system operated for 16 hours, 2 hours, 15 hours and 24 hours respectvely. 123 solar photovoltac modules n parallel each havng 2 modules n seres of Central Electroncs Lmted Make PM 150 s needed to run the gas compressor for storng hydrogen n the cylnder durng sunshne hours. If the number of types of equpment and operatng hours change, then the confguraton of ntegrated solar photovoltac and electrolyzer-pem fuel cell wll change References Fg.9 Hydrogen consumpton and producton pattern for the month of December AlKaraghoul,A.,&Kazmersk,L.L.(2010)Optmzaton and lfe-cycle cost of health clnc P system for a rural area n southern Iraq usng HOMER software. Solar Energy,84, IJRED ISSN: , 15 th July 2017, All rghts reserved

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