TECHNICAL EXHIBIT 16 - BHKW Technical Data english.pdf

TECHNICAL EXHIBIT 16

TECHNICAL INFORMATION

CHP-unit GG 70

1.0 Performance date

Compact cogeneration unit with synchronous alternator to generate three-phase current 400 V, 50 Hz and heating water at a temperature level 90/70 ˚C from natural gas with 3-way catalytic converter for low emission lambda = 1operation, undercutting the emission standards of German TA Luft 2002 (technical guideline for air pollution control) by half.

The performance data is valid for an altitude of up to 100 m above SL and an air temperature of up to 25˚C.

Mains parallel mode Standby power system

(not overloadable) (10% overloadable, cos ⱷ = 0,8)

Electric power (gross): 71 kW 81 kVA

Power consumption *): 2 kW

Electric power (net): 69 kW

Heating power (Tolerance 5%): 114 kW 104 kW

Energy consumption (Tolerance 5%): 204 kW 185 kW

Internal consumption, without external electrical loads

2.0 Design and scope of supply

Engine with accessories

Engine type MAN E 0836 E 302

Combustion method Gas-Otto-engine

Cycle 4 stroke

Number/design of cylinders 6 in row

Bore/lift 108/125mm

Stroke volume 6,87 dmᶾ

Rotation speed 1500 min-1

Average piston speed 6,3 m/s

Average effective pressure 8,73 bar

Compression ratio 13 : 1

ISO standard rating according to DIN 6271 75 kW

Specific full load consumption 2,72 kWh/kWhmech

Full load consumption at Hi (net calorific) = 10kWh/Nmᶾ 20,4 Nmᶾ/h

Average consumption of synthetic lube oil (estimated) ca 25g/h

Engine description:

- cranck case with cylinder vlock made of one piece of cast iron, closed from below by oil tray, closed to the rear by flywheel timing case, exchangeable, dry cylinder liners;

- - double cylinder head with integrated cooling water and oil ducts, cast-in spin suction ducts and shrunk valve seat rings and replaceable valve guides;

- - vales arranged hanging, one valve per cylinder for inlet, one for outlet, valve stems made from carbide metal, camshaft with 4 bearings;

- Light metal pistons cooled be pressurised oil stream via oil nozzels;

- Cracked connecting rods, crankshaft with 7 bearings and forged-on counterweights, bearing boxes with steel back side, leaded bronze liner and ternary bearing surface;

- Single flow mixture suction pipe, water-cooled exhaust fume collector;

- Water cooled exhaust pipe leading to the exhaust heat exchanger;

- Gear pump for pressure lubrication, tandem lube oil filter in main flow and cooling by oil cooler, automatic oil refill unit and oil storage tank;

- Air intake via dry filter from the engine room;

- Crankcase breather with oil separator valve and connection to the air intake;

- Closed cooling water circuit with electrical three-phase circulating pump 400

V, safety valve and expansion tank with pressure gauge for engine cooling;

- Electrical starter 24 V 4 kW;

- Microprocessor-controlled ignition system with one ignition coil per cylinder.

2.1 Gas supply

Safety gas line in accordance with DVGW-VP 109, mounted inside the sound absorbing casing and vibration-decoupled twice, consisting of a bulk delivered ball-valve with thermal shutoff, filter, pressure gauge with push-button valve, two solenoid valves, pressure control valve, gas regulation valve and flexible connecting tube, DVGW certified. Gas/air static Venturi insert and electronic speed governor with control element.

2.2 Gas supply and catalyst

Lambda probe for automatic regulation of the air/fuel-ratio, catalyst for emission reduction according to the standards of German TA-Luft 2002, built as 3-way catalytic converter for Lambda= 1 operation in combination with low ash and low alloy gas-engine oils, casing made of heat-resistant steel, catalyst body made of special metal coated metal, emission values after catalyst in as-new condition related to 5% oxygen in exhaust fume at rated power:

NOᵪ - content < 125mg/Nmᶾ

CO – content < 150mg/Nmᶾ

2.3 Exhaust silencer

If required, a combined reflection/absorption exhaust silencer made of high-grade steel for the reduction of the exhaust fume sound level can be delivered.

2.4 Alternator

Inner-pole alternator, air cooled, protection class B3/B5, according to VDE 0530, radio suppression grade N. Synchronous alternator with integrated field coil, absorber cage and compound, brushless, two-layer winding, low harmonic content design, insulation class H.

Rated output 150 kVA

Rated current at nominal power 128 A

Efficiency rate at nominal power 94,2%

Cos ⱷ 1,0

Operating mode star

Ambient temperature, max. 40˚C

Voltage 400/231 V

Frequency / Rotation speed 50 Hz / 1500 min₋₁

2.5 Coupling

Engine and Alternator connected rigidly by SAE housing and interconnecting flange. Flexible coupling between engine flywheel and alternator shaft.

Replacing the flexible intermediate ring is possible without disassembling both engine and alternator.

2.6 Base frame and pipework

- Designed as sectional steel construction, holding engine, alternator and heat exchangers for cooling water and exhaust gas,

- Heat exchangers and engine completely connected and resulting in heating water and exhaust flanges, insulated as far as necessary,

- Elastic suspension between engine-alternator unit and base frame,

- All condensate lines are combined to one outlet.

- If required: circulating pump delivered plainly for mounting into the heating water pipe, designed according to pressure drop and flow rate of the CHP-unit.

2.7 Sound absorbing case

Powder coated steel plate casing with highly effective sound absorbing lining and elastic supporting feet. Fan for ventilation of casing and two thermostats for controlling and monitoring the air temperature. Easily accessible due to removable cowls on all sides with quick-lock mechanisms.

2.8 Switch cabinet, integrated compactly within the sound absorbing case

Control and monitoring (iPC with 5,7” colour-TFT-display incl. master control “MiniManager” and the optional internet-based monitoring system “RemoteManager”) section as well as switch box with power section according to AR-N-4105 compactly mounted within the sound absorbing case and wired ready for operation, optional setup according to BDEW-mid-voltage-guideline (mains monitoring, synchronizing, generator circuit breakers with additional shunt opening releases, maintenance free mains starter) possible. Further details in separate technical description.

2.9 Cooling water heat exchanger

Thermal output (5% tolerance) 65 kW Cooling water temperature inlet/outlet (as new condition) 86/80 ˚C Flow rate (engine cooling) 10,2 mᶾ/h Cooling pump load (efficiency class A) 0.8 kW Heating water temperature inlet/outlet 70/81 ˚C Pressure drop, heating circuit 175 mbar Plate-type heat exchanger material 1.4401

2.10 Exhaust heat exchanger

Thermal output (5% tolerance) 49 kW

Exhaust gas temperature inlet/outlet 610/100 ˚C

Heating water temperature inlet/outlet 81/90 ˚C

Pressure drop, exhaust 10 mbar

Pressure drop, heating circuit 195 mbar

Tube assembly heat exchanger material 1.4571 / P235

If required, an additional exhaust heat exchanger for exploitation of condensation heat to be mounted in the exhaust pipe and connected to the heating water return can be delivered (the parts of the exchanger in contact with the exhaust fumes are made of high-grade steel). The additional heating power amounts at up to 16 kW for heating water temperatures below 40 ˚C.

3.0 Technical data for planning and operation

3.1 Fuel

Natural gas of normal composition, free of phosphorus, sulphur, halogens, arsenic and heavy metals as well as solids and liquids, with constant fuel value and pressure and according to the rules of the DVGW sheet G260.

Methane number . 80 Gas flow pressure (overpressure) constantly between 20 – 100 mbar Gas temperature 10 – 30 ˚C Operating values for other fuel compositions and conditions on request.

We recommend using a gas warning system in the operating room (on side of customer)

3.2 Combustion air and ventilation

Combustion air requirements 199 Nmᶾ/h Air supply, in total approx. 2600 mᶾ/h Air temperature min./max. 10/30 ˚C Heat radiation from casing surface approx. 3kW Heat ventilation from within casing approx.. 13 kW Exhaust air approx. 2400 mᶾ/h Exhaust air temperature 50 ˚C Free pressing of the exhaust air fan (operating point/max.) 250 (260) Pa Electric load of fan (operating point) 261 (415) W Highly efficient radial fan with EC-motor and temperature controlled speed regulation, if required with connection box (can be mounted on frond side of unit with varying specifications on request). Operating the ventilation system above the designated standard conditions is not possible and leads to an increase in power consumption, the sound level and the operating temperature.

SOKRATHERM ®

Blockheizkraftwerke

D-32120 Hiddenhausen, Milchstrasse 12, Tel: + 49 5221 / 9621-0, Fax: + 49 5221 / 66063

3.3 Exhaust gas

Exhaust gas flow rate at 100 ˚C 310 mᶾ/h Permitted back pressure after unit 20 mbar A continuous condensate drain must be installed in the connected exhaust gas system. For multi-unit systems each unit has to be equipped with a separate exhaust gas system.

3.4 Sound levels

Sound level of engine (with/without sound absorbing case) 63/82 dB (A)

Sound levels after unit 116 dB (A)

Exhaust sound level after optional exhaust silencer 60 dB (A)

Ventilation sound level after optional exhaust silencer 60dB (A)

Ventilation sound level after fan (operating point) 69 sB (A)

(Free field sound pressure values in 1m distance.)

(Each value as total sound pressure level in 1m distance.)

The triple shock absorption of the CHP-unit reduces the impact sound transmission to a minimum. A foundation for the installation of the CHP is not necessary if the engine room floor is able to carry the load of the SHP-unit.

3.5 Heat production

The cooling water heat and the exhaust heat have to be utilised on part of the customer from the connection flanges listed below. Layout data:

Return-temperature to unit min./max. 50/70 ˚C

Standard flow rate 4,9 mᶾ/h

Standard temperature increase 20 K

Pressure drop 0,50 bar

Operating pressure, max. 6 (optional 10) bar

A strainer has to be installed in the return connection with filter diameter of 0,25 mm

3.6 Filling quantities and quality demands

Oil tray 34 liter

Oil storage tank 48 liter

Engine and heat exchanger coolant 23 liter

(Lubricating oil and coolant have to fit separate release lists.)

Heating water 50 liter

Treatment of the contents, additional and rotating heating water according to VDI guideline

2035 (group 4) with the following limits:

Total earth-alkaline , 0,02 mol/ mᶾ (0,1 ˚dH) pH-value 9… 10,5

Molecular conductance , 250ɥS/cm

Oxygen content , 0,05 mg/l

Chloride content , 20 mg/l

Phosphate content 5… 10 mg/l

3.6 Dimensions, connections and weight

Length 2400mm Width 900mm Height 1800mm Operating weight 2070 kg Dry weight 1920 kg Dry weight 1920 kg Heating water inlet/outlet 1 1/2“ (i) Gas regulation unit R 1” (i) Condensate R 1/2” (a) Exhaust (flange) DN 80 (PN10)