automatic regulation of mixture richness way to emission decrease is in standard equipment of CHP unit

Transcription

1 Basic characteristic CHP units TEDOM Cento series are machines of medium outputs, using gas engines, which evoke from car engines. It forms series of outputs from 40 to 300 kw. CHP unit is designed into container, which contains engine-generator set, complete heat equipment including exhaust silencer and electric switchboard (containing control and power part). CHP unit is intended for operation with biogas group no. 1, for outdoor operation. CHP unit is designed as SP with synchronous generator intended for parallel operation with mains: 400V/50 Hz. Warm-water circuit is modified for temperature gradient 90/70 C. CHP unit TEDOM merits: CHP unit forms easily connect-able compact complex by container usage CHP unit is characterized by low noisiness possibility of modification to different temperature gradients of heating systems automatic regulation of mixture richness way to emission decrease is in standard equipment of CHP unit thank to modular conception of control system it is possible to easily extend quantify of binary and analogous inlets for monitoring and controlling following devices, eventually change the operation (SPE, SPI,...) it is possible to connect basic signals for CHP unit controlling on customers terminal box (external emergency stop, external start) unit is functionally tested in production plant CHP units TEDOM are still innovated in terms of realized orders Because of resolution of Notified Body 1015* certificate E was edited, declaring conformity of product series Cento with requests of regulation 90/396/EEC (Government Regulation no. 22/2003 Coll.). Company TEDOM is also holder of certificates of QMS and EMS. In terms of tests performed on control switchboard, Electro-technical Test Institute (certificate authority no accredited by Czech institute for accreditation, o.p.s. acc to ČSN EN 45011), edited a certificate no The product is also certified for Russia, Ukraine and Belarus. * Engineering Test Institute, public enterprise, Brno, Czech Republic illustrative picture design operation fuel container SP synchronous, parallel with mains biogas TS BIO_KON_C05_(zm.C) 1

2 Basic technical data Engine nominal electric output maximal heat output fuel input 165 kw 196 kw 436 kw electric efficiency 37,8 % heat efficiency 45,0 % total efficiency (fuel use) 82,9 % fuel consumption at 100% of output 67,1 Nm 3 /h fuel consumption at 75% of output 53,6 Nm 3 /h fuel consumption at 50% of output 39,4 Nm 3 /h Basic technical data are valid for standard conditions acc to document Technical data validity and document Technical instruction gas fuels Requested minimal continuing electric output is 50% of nominal output Gas consumption is mentioned for biogas with methane volume 65%, at normal conditions (0 C, 101,325 kpa). CHP unit is driven by gas combustion engine TB 170 G5V TW 86, product of company TEDOM. number of cylinders 6 cylinders arrangement bore stroke in line 130 x 150 mm displacement cm 3 compression ratio 14 : 1 speed 1500 min -1 oil consumption normal/max max. output of engine TB 170 G5V TW 86; change B: ,3/0,5 g/kwh 173,6 kw Emissions observance CHP unit observes emission values* in exhaust gas: at 5%O 2 in exhaust gas CO NOx mg/nm 3 mg/nm 3 * CHP unit observes emission limits according to Czech Republic Government Regulation no. 146 from 2007 and regulation TA-Luft Generator Source of electric energy is synchronous generator with basic parameters acc to given table. generator output 250 kva / 200 kw cos 0,8 / 1,0 efficiency in working point 95,7 % max. operation temperature 40 C illustrative picture voltage frequency 400 V 50 Hz speed 1500 min -1 cover IP 21 TS BIO_KON_C05_(zm.C) 2

3 Heat system Heat system of CHP unit is formed by two independent circuits, secondary and technological. Heat output of secondary circuit is intended for usage in heating system of user, or it is cooled by cooling unit in primary circuit (if heat is not requested). Heat output of technological circuit is cooled by cooling unit. Secondary circuit - represents circuit, by which is secured transfer of CHP unit heat output (gained by cooling of engines and exhaust gas) into heating system. Normally the circuit works with temperature of reversible water from 65 to 70 C. Compliance of limit values is necessary for trouble-free operation of unit. Parts of secondary circuit located in outdoor area (connecting pipeline) must be protected against freezing by sufficient concentration of ethyleneglycol in water solution. Circuit is not equipped by circulating pump. Secondary circuit parameters: heat-transferring medium water + ethyleneglycol ethylene-glycol concentration 35 % heat output of circuit 196 kw nominal temperature of water inlet / outlet 70/90 C temperature of reversible water min / max 65/70 C nominal flow max. operation pressure 2,6 kg/s 600 kpa reversible water temperature 1) C filling mixture temperature C electric output kw 1) reversible water temperature is only for information heat-transferring medium water + ethyleneglycol ethylene-glycol concentration 35 % heat output of circuit temperature of cooling liquid entering the engine min / max nominal flow max. operation pressure 17 kw 35/55 C 1,5 kg/s 300 kpa hydraulic volume of circuit in CHP unit cca 50 dm 3 Heating water for hydraulic circuits filling must be modified, its composition must correspond with document Technical instruction water circuits. In case of CHP unit stop during heating season, external parts must be protected against freezing. Fuel, gas inlet Technical data mentioned in this specification are valid for biogas group no. 1 with parameters given below. methane volume (heating power 23,4 MJ/Nm 3 ) 65% hydraulic volume of circuit in CHP unit 30 dm 3 gas pressure 5 10 kpa pressure loss at nominal flow 30 kpa nominal temperature gradient 20 C Primary circuit - represents internal closed pressure circuit, which takes over heat from engine water jacket and exhaust exchanger and transfers it to secondary circuit. If heat output is not requested, it is led out by cooling unit for emergency cooling (exchanger liquid-air). heat output of circuit max. operation pressure 196 kw 300 kpa hydraulic volume of circuit in CHP unit 170 dm 3 Technological circuit - represents circuit of filling mixture cooling. Heat level of liquid in this circuit immediately affects cooling of mixture and thereby achievement of CHP unit basic technical data. The circuit works with temperatures of reversible water (on inlet into filling mixture cooler) from 35 to 55 C the lowest temperature corresponds to nominal electric output. With temperature increase (because of high temperature of outdoor area) the electric output decreases. CHP unit electric output also corresponds with different temperatures of technological circuit cooling liquid. Cooling unit for heat output transfer into outdoor area (exchanger water-air) is installed on roof of container. Basic parameters of cooling liquid temperature influence are mentioned in following tables. max. change of gas pressure at consumption changes 10 % max. temperature 30 C Limit parameters of biogas group no. 1 limiting its usability are mentioned in document Technical instruction Gas fuels. Input gas line is formed according to TPG G and contains gas filter, set of two independent quickclosing electromagnetic valves for gas inlet closing at unit stop, zero regulator of gas pressure and metal hose for connection to mixer. For CHP unit correct operation gas connection with correct dimension and adequate accumulative volume is required (preventing before gas pressure decrease in period of jump gas off-take) ended by hand gas closer and equipped by pressure gauge. TS BIO_KON_C05_(zm.C) 3

4 Combustion and ventilation air Non-usable heat (radiated from hot parts of the CHP unit) is removed from unit by ventilation air, which enters the unit by relevant holes in container wall and leaves the unit through roof hole in opposite area. Flow of ventilation air is secured by ventilator inside container roof. Inlet and outlet hole of ventilation is equipped by anti-rain jalousie. Part of air is separated from ventilation air inside container and is used as a combustion air. non-usable heat removed by ventilation air 27 kw quantity of combustion air 678 Nm 3 /h nominal quantity of ventilation air 7700 Nm 3 /h outdoor air temperature min / max -20/35 C Electric radiators are installed for heating of container internal space. They enable, during CHP unit stop in period of heating season, heat internal area of container and secure temperature in container needed for enginegenerator start. Radiators are designed for temperatures acc to table above. Exhaust gas, condensate diversion Exhaust gas leave CHP unit by outlet exhaust gas line connected to outlet flange of exhaust silencer. Exhaust silencer is located on container roof. Exhaust gas according to need can be led into suitable chimney by exhaust gas line, or can leave directly into atmosphere. Following exhaust line (if used) has to have down-grade in direction from CHP unit. If exhaust gas line is used, its maximum pressure loss of whole exhaust gas line from unit flange can not be higher than 10 mbar. exhaust gas quantity 740 Nm 3 /h exhaust gas temperature nominal / max 150/180 C max. exhaust gas counter-pressure behind flange exhaust gas speed on outlet (DN 150) Lubricants 10 mbar 18,0 m/s quantity of lubricating oil in engine 56 dm 3 volume of oil tank for refilling 44 dm 3 Noise parameters Noise parameters indicate level of acoustic pressure, measured in free acoustic field. Determination of measuring places and method of evaluation corresponds with ČSN CHP unit in 10 m from container 73 db(a)* * noise related to engine-generator set and cooling units operation Electrical parameters nominal voltage nominal frequency power factor nominal current at cos φ=0,8 generator circuit breaker switchboard short-circuit resistivity own source contribution to short-circuit current power switchboard protection closed/opened control switchboard protection closed/opened recommended superior circuit breaker recommended connection cable ** (l< 50m, t<35 C) 230/400 V 50 Hz 0,8L 0,8C 276 A NR400F 3P 25 ka < 3 ka IP 32/00 IP 32/ A CYKY ** Listed cable is only for information, it s necessary to perform check calculation of temperature rise and voltage drop according to real length, placing and cable type (max. allowed voltage drop is 10 V) Switchboard design CHP unit electric part is placed in steel switchboard where power even control parts are located. Switchboard contains: generator circuit breaker, which protects generator and part of power line against over-current and works like contacting component for synchronizing generator to mains. Combination of circuit breaker and contactor is fitted as standard XS terminal for power outlet line connecting XG terminal for generator connecting current measuring transformers central part of control system, eventually extension modules protecting and switching components controlling components for maintenance purposes power supply 24VDC terminals for connecting of analogous sensors, binary switches, controlled devices, remote communication etc. customer terminal Switchboard dimensions: height [mm] length [mm] depth [mm] R Listed dimensions are for common switchboard containing both power and control part. TS BIO_KON_C05_(zm.C) 4

5 Control system Control of the unit provides control system ProCon Sight, which allows fully automated operation. It is multiprocessor modular system, consisting from control unit, display unit and extension modules with analogous and binary inputs and outputs. Display unit Thanks to colour display with high resolution, context and navigation buttons provides this display unit easy accessibility of all data about gen-set, measured values and time trends of these values. ProCon Sight display unit can contain up to seven languages, one of them can be graphical (e.g. Chinese, Korean). Ways of control Local: by buttons located on control system or on display unit Remote (at request): by voltage-free contacts (external timer, superior control system etc.) according object consumption level or to requested power level from local or remote PC via SMS messaging Regulation according to object consumption (at request): information about object consumption is provided to controller by power transducer, which evaluates direction and quantity of import /export from/to mains Regulation to required power (at request): by analogous signal e.g. 0/4 20mA via data communication e.g. protocol MODBUS- RTU Gen-set operation monitoring Main features of display unit: large 8 colour TFT display with resolution of 800 x 600 pixels simpler, faster and more intuitive control by context buttons continuous display of status bar TRENDS monitoring screen of selected values - diagrams clear history display Windows CE operating system Measured values Control system measures and evaluates following values. Electrical values: 3 generator voltage 3 generator current 3 mains voltage Listed electrical values are used for: mains parameters evaluating automatic synchronization of generator to mains calculations and evaluation of needed electrical values Technological values: CHP unit is equipped with set of analogous and binary sensors for monitoring of all needed processes to optimize them. Optimization is performed by appropriate selfconsumption outputs. From local PC connection possibilities: RS232 RS485 USB From remote PC connection possibilities (at request): analogous modem GSM modem internet Via SMS messaging (at request) Colour design engine, generator, internal parts of unit container RAL 7035 (grey) RAL 5013 (blue) TS BIO_KON_C05_(zm.C) 5

6 Proportions and weight of the unit length width total / transport height total / transport transport weight of CHP unit transport weight of other parts operational weight 5000 mm 4800/2490 mm 5000/2700 mm 5810 kg cca 950 kg 7200 kg Consequential documents dimensional drawing: -T200 drawing number R0927 scheme: -T180 drawing number S0464 generally effectual documents acc to document Schedule of valid technical documents TS BIO_KON_C05_(zm.C) 6