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Growing Customer Base Happy Customers Increased Revenue Reduced Callouts Reduced Time Wastage More profit per employee
• Real time information • Automation • Energy Efficiency • Measurable improvements • Gas monitoring and shutdown • Less Downtime
• Automatic alarm notification • Remote monitoring • Remote diagnosis and adjustment • Automated Reporting • Ability to prioritise
• Large Energy costs • Incentives to reduce energy usage • Change R22 and the old HFC’s to the
modern HFC’s and HC’s • Retrofit • New Equipment
• Gas Safety concerns
• Low Cost • 10.6” Touch Screen • 8 analogue inputs, 4 derived
inputs and 4 digital inputs • Can accept other sensors • 2 analogue and 8 relay outputs. • PID and On/Off Control • Alarms • PLC Logic • Auto and Manual Reporting • Trend displays • Remote Access • UPS
Hawk-Eye 800 Block Diagram 10.6” full colour
touch-screen plus Data storage and
internet
Internet
Controlled Elements
Measured values
Monitoring, Alarms,
Controllers, PLC
8 Analogue inputs
2 x Analogue outputs
8 x Relay outputs
4 Digital inputs
Uninterruptable Power Supply
• Simple Monitoring • Temperature, Pressure, Power, Water, CO2
• Gas Detection and Shutdown • Compressor Control. • Evaporator Control. • Superheat Control . • Defrost Control. • Oil Temperature Control
• Change to VFD • Compressor • Evaporator fans
• Change to Propane gas • Compressor staging • Adjust freezer temperature • Alarm on freezer doors opening times • Defrost Management • Cold Room setpoint
• Example 10kW • High Start up Current • VF Drive At 60% of full
speed requires approx 22% of full power
• Saving $9,000.00 p. a. Method % Running Power Energy CPH at 27c Cost per Year
On/Off 60 10kW 6kWh $1.62 $14,200.00
Variable Frequency 100 2.2kW 2.2kWh $0.594 $5,207.00
• Determine performance criteria eg • Water used, Energy used, CO2 produced • Running Costs
• Install suitable sensors and transmitters • Measure these parameters before making
improvements • Make improvements • Measure these parameters again • Reductions and savings
• Use P vs T table for the refrigerant gas • Enter 21 point curve into lineariser to convert
measured pressure into saturated temperature
• Use derived formula number 1 to calculate difference between actual temperature and saturated temperature.
• Set up PID controller on Derived input. • Output of controller feeds thermal expansion
valve • Set alarms on Superheat value to warn if
temperature difference gets too low.
PID Control
T. E. V.
Temp Difference
Pressure to temp
Actual temp
• Sensors: • Transmitters or trip modules
• Gas detection: • Infra red, Semiconductor, Heated wire bridge
• PLC sequence • feed valve , return valve, Shut down compresso, Start
exhaust fan • Siren Alert • Safety Lockout
Universal Easily affordable Solution. Energy savings quickly pay for the investment. Easy to install and operate. Strong relationships between contractor and
customer. Visibility for contractors and customer. Reduces time on site. Increases your profit. Grow your customer base.
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