Wim compas™

Name: Wim compas™
Brand: Hobré

Fuel gas & flare gas combustion measuring

The WIM COMPAS™ adds to Hobré’s portfolio of process analyzers for (Fuel and flare gas combustion measuring) measuring the Wobbe Index, heating value (BTU) and the Combustion Air Requirement Index (CARI). Designed and manufactured in-house, the WIM COMPAS™ builds on hobré’s 20+ years of success and experience with residual oxygen type analyzers. The WIM COMPAS™ is used to control the thermal input and air:fuel ratio in such a way that disturbances caused by fuel gas quality fluctuations are minimized, the combustion process occurs with maximum efficiency and emissions are reduced to a minimum.

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Key Benefits

Can be installed outdoors
Easy to operate
Unmatched response time
Suitable for installation in hazardous area
Safe flameless design
Handles high dewpoint
Measures flare gases and sour gases
Zero Hydrocarbon Emission

Wim compas™

Fuel gas & flare gas combustion measuring

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Versions

Product Comparison

Applications

Tech Specs

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WIM COMPAS^tm - Versions

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Continuous

This version is designed for top performance where response time, repeatability and reliability count. A small sample flow is mixed continuously with air. The air-fuel mixture undergoes catalytic combustion followed by measurement of the residual oxygen. This provides a direct measure of CARI and correlates to the Wobbe Index as per ASTM 4891-89. By integrating a specific gravity cell, heating value and air demand are also measurable.

Cyclic Injection

The WIM COMPAS™ offers an unmatched, robust solution with high availability, for Fuel and flare gas combustion measuring, such as sour gas and flare gas. Hobré has developed an analyzer especially for these kinds of applications, that injects small amounts of gas into an air stream, typically at intervals of 30 seconds. The oxygen peak size is a direct measure of the air demand and proportional to the heating value (BTU).

High Temperature

Keeping the gas above dewpoint is crucial to the success of most applications. The WIM Compas™ can be heated up to 55°C (131°F) as standard; high-temperature versions (up to 150°C / 300°F) are available if required

Product Comparison

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In the table below, you may find the differences of the WIM variants available:

Model	WIM COMPAS™ Xpress	WIM COMPAS™ Flex	WIM COMPAS™ Pulse	WIM COMPAS™ Pulse HT
Technology	Residual Oxygen method	Residual Oxygen method	Residual Oxygen method	Residual Oxygen method
Principle	Continuous type	Continuous type	Injection type	Injection HT
Typical Response	T90 <5 seconds	T90 <5 seconds	Update time 30 seconds	Update time 30 seconds
Gas / Application	Natural Gas, LNG – Blending, Turbine (Power)	Fuel gas – Blending, Turbine (Power), Burner/Furnace/Heater/ Boiler	Blast Furnace Gas, Coke Oven Gas, Flare gas, Sour gas –Steel applications, Flaring	Flare gas, Sour gas (high dew point up to 150°C/300°F) – Flaring

Applications

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Brochure WIM COMPAS ™

Combustion Control

Efficiency with Blast Furnace Gas / Coke Oven Gas

Flare Gas measurement

Monitoring compliance with Rule 21 - GATEKEEPER

SAGD Steam Generation

VOC and Storage

Technical Specification

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Application	Natural Gas, Fuel Gas, Flare Gas, Biogas, Blast Furnace Gas, Coke Oven Gas, LNG etc.
Measuring principle	Residual Oxygen technology
Sample wetted parts	SS316
Installation options	Safe Area ATEX II 2G/3G Ex px [ib] IIC T3/T4 Gb (Zone 1 / 2) Class 1, Div. 2, Group B, C, D T3 (Zone 2 compliant) IECEx Ex px [ib] IIC T3/T4 Gb KCS Ex px [ib] IIC T3/T4 Gb TRCU (EAC) Ex px [ib] IIC T3/T4 Gb PECO (CCOE) Ex px [ib] IIC T3/T4 Gb

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MEASURING RANGES (CONTINUOUS VERSION)
Wobbe Index	0 - 100 MJ/Nm3 / 0 - 2500 BTU/scf range (50 MJ/Nm3 / 1250 BTU/scf span)1)
Accuracy	< ± 0,4% of full scale for Natural Gas
Repeatability	< ± 0,05% of full scale or ± 30 kJ/Nm3 (whichever is higher) 1)
Response time	T90 < 5 seconds on Natural Gas
CARI 2)	0 - 25 range
Calorific Value (SG cell option)	0 - 120 MJ/Nm3 / 0 - 3000 BTU/scf range (50 MJ/Nm3 / 1250 BTU/scf span 1)
Response time CV signal	T90 < 5 seconds (typically on Natural Gas)

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MEASURING RANGES (INJECTION VERSION)
Calorific value	0 - 120 MJ/Nm3 / 0 - 3000 BTU/scf range (50 MJ/Nm3 / 1250 BTU/scf span 1)
Accuracy	± 1,0% of full scale
Repeatability	± 0,5% of full scale or ± 300 kJ/Nm3 (whichever is higher)
Update time	Default ~30 seconds (injection interval)
Air Demand	0 - 50 range
Wobbe Index (SG cell option)	0 - 100 MJ/Nm3 / 0 - 2500 BTU/scf range (50 MJ/Nm3 / 1250 BTU/scf span 1)
Update time WI Signal	Default ~30 seconds (Injection interval)

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OUTPUTS (CONTINUOUS/INJECTION)
Local HMI	Full color display with capacitive touchpad (all functions)
Analogue outputs	2 off isolated 0 / 4 – 20 mA (optionally up to 4), max. 500 Ω load (active)
Digital outputs	2 isolated relays (250 VAC) and 8 transistor outputs (24 VDC) standard available (optional: 6ea)
Digital inputs	8 digital inputs (e.g. start calibration, start validation, etc.)
Communication options	– Remote operation / Modbus TCP/IP over Ethernet or Optical fiber – Modbus RTU over RS485 or Optical fiber

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UTILITIES	Continuous version	Injection version
Instrument air 3)	15 Nl/min	0,2 Nl/min
	50 Nl/min: Ex purge option ATEX / IECEx / Class 1 Div 2 / KCS / TR CU / PESO 4)	50 Nl/min: Ex purge option ATEX / IECEx / Class 1 Div 2 / KCS / TR CU / PESO 4)
Sample flow	± 1 Nl/min	± 0.5 Nl/min
Sample pressure	1,5 to 5 barg / 21,8 to 72,5 psig	-0.3 to 0.5 barg / -4,4 to 7.2 psig 5)
Power supply	115/230 VAC, 50/60 Hz
Power consumption	Depending on configuration (typically 1000 W, max. 2500 W)

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Also available in Kcal/Nm3, kWh/Nm3 etc.
CARI= Combustion Air Requirement Index
At 4 barg minimum, 10 barg maximum, dry and clean
Pre-purge flow: 70 Nl/min
Consult factory for diffferent sample pressures
Note: Instrument air temperature should not exceed max. ambient temperatur

WIM COMPAS™		Xpress⁴⁾	Flex	Pulse	Pulse HT
P	Standard	O	O	O	O
C	Continuous measurement version (1.5 – 5 barg / 21.3 – 72.5 psig)	O	O	-	-
I	Injection version (-0.3 – 0.5 barg / – 4.4 – 7.2 psig)	-	-	-	-
115	Power supply 115 VAC, 50/60 Hz	O	O	O	O
230	Power supply 230 VAC, 50/60 Hz – N/A for Class 1 Div 2	O	O	O	O
0	No specific gravity meter	O	O	O	O
SGU	Hobré specific gravity meter up to 55°C / 130°F	-	O	-	-
SGC	Oscillation type specific gravity meter up to 80°C / 176°F (Hobré standard version)	-	O	O	-
SGC HT	Oscillation type specific gravity meter (High Temperature)	-	-	-	O
0	No sample pressure monitoring	O	O	O	O
SPM	Sample pressure monitoring	-	O	O	O
OFA ¹⁾	Oven Flow alarm	-	O	O	-
FPM ¹⁾	Oven flow alarm and Sample pressure monitoring	-	O	O	-
0	Safe area version	O	O	O	O
1	ATEX II 2G Ex Zone 1 IIC T3/T4 Gb (including Power/Signal isolation, excluding Backup purge)	O	O	O	O
3	ATEX II 3G Ex Zone 2 IIC T3/T4 Gb (including Power/Signal isolation, excluding Backup purge)	-	O	O	O
Z	CSA Class 1, Div. 2, Group B, C, D T3 version	O	O	O	O
E1	IEC Ex px [ib] IIC T3/T4 Gb (including Power/Signal isolation, excluding Backup purge)	O	O	O	O
K	KC5 Ex px [ib] IIC T3/T4 Gb (Korea) (including Power/Signal isolation, excluding Backup purge)	-	O	O	O
P	PESO/CCOE Ex px [ib] IIC T3/T4 Gb (India) (including Power/Signal isolation, excluding Backup purge)	-	O	O	O
T	TRCU/EAC Ex px [ib] IIC T3/T4 Gb (Russia) (including Power/Signal isolation, excluding Backup purge)	O	O	O	O
2	2 analog outputs	-	O	O	O
4	4 analog outputs	Included	O	O	O
0	No serial communication	-	O	O	O
R	Remote operation / Modbus TCP/IP over Ethernet	-	O	O	O
RO	Remote operation / Modbus TCP/IP over Optical fiber	-	O	O	O
M	Modbus RTU over RS485	-	O	O	O
MO	Modbus RTU over Optical fiber	-	O	O	O
RM	Remote operation / Modbus TCP/IP over Ethernet and Modbus RTU over RS485	Included	O	O	O
RMO	Remote operation / Modbus TCP/IP and Modbus RTU over Optical fiber	-	O	O	O
0	No extra isolated relays (standard 2 off isolated relays)	O	O	O	O
R	8 off isolated relays	-	O	O	O
0	No fastloop inside the analyzer	O	O	O	O
F	Fastloop installed inside analyzer	O	O	O	O
FA ¹⁾	Fastloop with alarm installed inside analyzer	-	O	O	-
0	Standard ambient temperature range (5 – 40°C / 41 – 104°F)	O	O	O	O
H	Heated electronics for low ambient temperature (down to -20°C / -4°F)	O	O	O	O
C	Cooler for high ambient temperature (up to 55°C / 131°F)	O	O	O	O
HC	Version for ambient temperature range (-20 – 55°C / -4 – 131°F)	O	O	O	O
1	Analyzer suitable for wall mounting	O	O	O	O
HT	High Temperature application (max. 150°C / 300°F)	-	-	-	O
ZE ²⁾	Zero HC Emission (max. backpressure 0.5 barg / 7.2 psig)	O	O	-	-
FEH2 ³⁾	Frontal Elution H2 (Hydrogen measurement)	-	-	-	-

Notes:

The standard Flow alarm cannot be used in the High Temperature application. Please consult Hobré if required.
The Injection version is suitable for Zero HC emission operation by design.
The HC (Heater/Cooler) option is mandatory in case of the Pulse HT analyzer in combination with FEH2 Hydrogen measurement.
The Xpress model is suitable for Natural gas / LNG application only.