renteknik refrigeration and cooling systems - know the perfromance | maximize the efficiency -...
Post on 30-Jun-2015
560 Views
Preview:
TRANSCRIPT
Cooling and Refrigeration System Analyzer
KNOW THE PERFORMANCE | MAXIMIZE THE EFFICIENCY
1
RenTeknik Group
Property of Renteknik Group Inc. All rights reserved
• 15-20% of the world’s total electricity consumption is for refrigeration
and air-conditioning
• Electricity cost for cooling often represents 40-60% of the total
energy consumed in a building in the cooling seasons
• The majority of cooling systems don’t work as efficiently as they could
2
Did You Know?
Property of Renteknik Group Inc. All rights reserved
Background
• Chilled Water and Cooling Systems can be costly to operate and
maintain
• There is the misconception that operating = efficient
• Without an effective method and efficient tool, these system
normally operate inefficiently
• ClimaCheck allows you to see into the ‘black box’ on system
performance and realize significant energy savings through
optimization
• Renteknik is the North American Technology Integration Partner for
ClimaCheck AB from Sweden
Property of Renteknik Group Inc. All rights reserved
• Portable Analyzer originally developed in Sweden 1986
• Fixed Analyzer developed 2004
• Web based monitoring launch 2008
• Used by notable European companies in commercial, industrial,
institutional and retail facilities
• Standard for commissioning and re-commissioning of systems
throughout the world
4
World Wildlife Fund estimate global CO2 reduction in 2020 to 72 million tons from 50% of
market implementing improved serviceProperty of Renteknik Group Inc. All rights reserved
The Principle Behind ClimaCheck
• Base on the First Law of Thermodynamics – energy can neither be
created nor destroyed, it can only be changed from one form to
another
5
Mass flow = (electrical input-heat losses) (1)Enthalpy difference
Cooling Capacity = Mass flow * (h2 – h3) (2)
Heating Capacity = Mass flow * (h1 – h3) (3)
Isentropic Efficiency = (hs – h2) * (1 – rel. heat loss) (4)(h1 – h2)
Property of Renteknik Group Inc. All rights reserved
Accuracy
• Accuracy of Calculated Data
– Coefficient of Performance (COP) - ±5%
– Cooling and heating capacity (±7%)
– Power input (±2%)
– Compressor isentropic efficiency (±3%)
• Sensors
– Pressure sensor (±1% FS - Full Scale)
– Temperature sensor PT1000 Class A
– Electrical Energy power meter ClimaCheck EP Pro, Class B
– Current Transformers - 20-120% of rating (±2%)
Property of Renteknik Group Inc. All rights reserved
How Does ClimaCheck Work?
• Non-Invasive Sensors are attached to Equipment points
• Basic setup of 7 temperature sensors, 2 pressure sensors and 1
active power sensor
• Set-up by a qualified Technician
• 30 minutes/piece of Equipment2 Pressure Sensors connected
at service ports
1 Electrical Input Sensor
7 Surface Temperature Sensors
Property of Renteknik Group Inc. All rights reserved
• A thermodynamic evaluation produces an unbiased analysis
with no information about the system or compressor
required
8
• 2 pressures sensors
• 7 temperatures sensors
• 1 power input sensor
Thermodynamic Model
Property of Renteknik Group Inc. All rights reserved
9
Quick Non-Invasive Sensor Attachment
Property of Renteknik Group Inc. All rights reserved
10
Sample Applications
Property of Renteknik Group Inc. All rights reserved
• Optimization increases energy efficiency
• Estimated 10-40% Energy Savings
• Increases reliability, reduced equipment wear
• Alerts and alarms to changes effecting operating efficiency
• Lowers operating and maintenance expenses
• Reduces CO² emissions
• Benefits the owner and the environment!
11
ClimaCheck Performance Analyzer
Property of Renteknik Group Inc. All rights reserved
ClimaCheck PA Pro Portable
• In field measurements for
commissioning, service or inspections
• Documentation and analysis of the
equipment’s actual performance
• Immediate and precise answers on
heat pump, cooling and air conditioning
unit operations
12Property of Renteknik Group Inc. All rights reserved
ClimaCheck PA Pro Fixed
• Continuous monitoring of energy
consumption and performance
• Access to real time data via the
internet
• Predefined Energy Reports provide
continuous information about the
equipment’s energy consumption
13Property of Renteknik Group Inc. All rights reserved
The Benefits of a Fixed Installation
• Knowing how a system is performing allows continuous monitoring
of energy efficiency
• If a compressor or heat exchanger performance fails, refrigerant
leaks, or if the equipment’s “energy profile” changes adversely, the
system automatically sends an alarm (email or SMS) regarding
the changes
• Detailed information about the problem is available via email or text
messages anywhere, anytime
14Property of Renteknik Group Inc. All rights reserved
15
Sample Installations
Pressure and temperature sensors Temperature sensor
Property of Renteknik Group Inc. All rights reserved
16
Sample Installations
Current Transformers
Pressure sensor on service port
Custom ClimaCheck SystemInstalled
Property of Renteknik Group Inc. All rights reserved
Web Portal Sample–System Flow Chart
17Property of Renteknik Group Inc. All rights reserved
Web Portal Sample–System Table
18Property of Renteknik Group Inc. All rights reserved
Web Portal Sample–System Graphic
19Property of Renteknik Group Inc. All rights reserved
Web Portal Sample–User Settings
20Property of Renteknik Group Inc. All rights reserved
Web Portal Sample–Flag Settings
21Property of Renteknik Group Inc. All rights reserved
Web Portal Sample–Logic Settings
22Property of Renteknik Group Inc. All rights reserved
Web Portal Sample–Alarm Settings
23Property of Renteknik Group Inc. All rights reserved
Web Portal Sample–Power Profile
24Property of Renteknik Group Inc. All rights reserved
Web Portal Sample–Energy Statistics
25Property of Renteknik Group Inc. All rights reserved
Applications
• Product and Systems Development
Leading manufacturers of systems for
cooling and heating use ClimaCheck’s
solutions for quality assurance of
products and solutions
• Commissioning and Inspections
When new equipment is being used for
the first time or when the warranty
period is coming to an end,
ClimaCheck’s solutions provides
assurance that equipment is operating
efficiently
• Troubleshooting
ClimaCheck provides fast
troubleshooting to minimize energy
consumption costs, repair time and
down time
• Preventive Maintenance and
Service
Predefined performance reports can
alert to possible imminent fails and
breakdowns making service and
maintenance easier and more
effective. Analysis of Performance
based maintenance vs. passage of
time26
Property of Renteknik Group Inc. All rights reserved
Multiple Uses
27
•Commissioning new systems
•Continuous monitoring
•Preventive maintenance
•Trouble shooting
•Decision support
•Real Time Performance inspection
Property of Renteknik Group Inc. All rights reserved
Objective of Performance Analysis
• The objective of performing an analysis of a Chilled Water System is
initially to improve the System’s performance through optimization
• Adjusting settings or controls
• Identify defective or inefficient system components that may require
immediate or future capital replacement
• After optimization establish a new base line for performance
• Continue to monitor the system and alert to deviations from optimum
energy efficiency
Property of Renteknik Group Inc. All rights reserved
• Step 1: Get a clear picture of how it is currently working by installing a
ClimaCheck Performance Analyzer
• Step 2: Monitor and analyze the equipment operation and
performance (energy efficiency)
• Step 3: Identify areas that require adjustment, upgrading or
replacement
• Step 4: Optimize the system and monitor ongoing efficiency to ensure
maximum is maintained29
What is the Process?RENE
Property of Renteknik Group Inc. All rights reserved
What Does ClimaCheck Provide?
• Enables Engineers and Refrigeration Technicians to:
– Perform cost effective real-time analysis
– Evaluate system performance
– See real-time COP, capacity, compressor efficiency and other
vital performance parameters without tedious calculations
– Data is presented dynamically in charts and tables providing an
immediate picture of actual performance
Property of Renteknik Group Inc. All rights reserved
Practical Benefits of ClimaCheck
• All data is available as soon as sensors are connected - most of the
time without need to stop the system
• ClimaCheck identifies irregularities in compressor and component
performance enabling pre-emptive maintenance and energy
optimization
• Without an effective method and an efficient tool, these problems
normally go unrealized, with the plant continuing to perform
inefficiently, or eventually breaking down
• Prevents potentially catastrophic consequences from refrigerant loss
and stock damage
31Property of Renteknik Group Inc. All rights reserved
Typical Findings
32
Common Identified Problems
Refrigerant shortage or over-charge Compressor damage or wearFan/pump under performanceFouling of heat exchangersFlow problems on secondary media (air/water/brine)Control problemsIncorrect superheat setting
Property of Renteknik Group Inc. All rights reserved
Significant Savings are Achievable
33
Historical savings using ClimaCheck PASupermarkets 20-30%Heat pumps 10-30%Ice rinks 20-40%Industry 10-30%Air Conditioning 10-30%
Property of Renteknik Group Inc. All rights reserved
Misconception AboutClimaCheck vs. BAS/EMS
• ClimaCheck is Complimentary to any BAS/EMS
• The BAS/EMS controls the functionality of the system/equipment
and may monitor some aspects of energy use
• The ClimaCheck system monitors the performance and ensures that
they are operating at maximum energy efficiency
Property of Renteknik Group Inc. All rights reserved
Analogy to Your Car
• Computers in cars control the functionality of the engine,
improving efficiency over older cars. In the same way many buildings
have BAS/EMS Systems
• These computers don’t demonstrate how efficiently the car is being
operated. Same is true in buildings and building systems
• Modern cars have advance computer technology to provide additional
real‐time information on efficiency (L/100kms, tire pressure, oil life etc.)
• ClimaCheck provides this function for cooling and refrigeration systems
Property of Renteknik Group Inc. All rights reserved
Examples and Case Studies
Property of Renteknik Group Inc. All rights reserved
Dual Compressor Chiller Example
Property of Renteknik Group Inc. All rights reserved
Sample Data – Military Base• The system is working under slowly fluctuating conditions on condenser water side • Is in a fairly stable operating condition• Supply chilled water is consistently slightly below 8°C. The returning cooling water
is varying in temperature when entering the condenser at between 27°C and 34°C • Fluctuation indicates that the system is not in a fully stable operating condition –
Check pumps, fans and valves – possible upgrade to VFD
Property of Renteknik Group Inc. All rights reserved
Sample Data – Military Base
• Measured compressor isentropic efficiency is noted to be low compared to the efficiency that would be expected from a state‐of‐the‐art compressor of this type
• Not unexpected for a centrifugal compressor that is operating at low part load
Property of Renteknik Group Inc. All rights reserved
Sample Data – Military Base
• The subcool is lower than what is normally desired to ensure that refrigerant does not pass through the condenser in an uncondensed state
• Contributing factor is part load operation when more refrigerant will migrate to evaporator resulting in a low T on the water side
• Full load analysis would need to be carried out to validate if refrigerant charge is correct • Confirm data against the recommended values for subcool at full and part load from the
manufacturer’s data, if available
Property of Renteknik Group Inc. All rights reserved
Supermarket Case Study Results-Italy
• Resetting of system controls resulted in a drastic improvement to the COP resulting in a 27% improvement
• Refrigeration systems typically use 50% of the total electricity consumption of the store
• Total electrical consumption of the Supermarkets was reported to have decreased by 7 to 13%
• Optimization and correction of identified problems resulted in energy savings of 15-30% on the refrigeration systems resulting in savings of over $415,000 annual electricity costs
• The cost of analyzing the refrigeration systems was recovered during the first year by the energy savings and the early detection of pending compressor problems which resulted in pre-emptive maintenance instead of costly failures
Property of Renteknik Group Inc. All rights reserved
Case Study– Portland, Oregon, USA
• All 14 roof top units (27 compressors) analyzed were operating
outside of manufacturers specifications
Red = outside specProperty of Renteknik Group Inc. All rights reserved
Case Study–Ice Rink, Sweden• Installed ClimaCheck in 2008 to visualize and track optimization
efforts (first trial location – now in all rinks in the Municipality • System optimization and installation of energy efficiency measures
with a max. 2 year payback• Some of the measures included: Control and setting adjustments,
lighting upgrade, heat recovery to heat cafeteria, installation of glass walls, relocation of fresh air ducts, change in arena air temperature, reflective cloth on ceiling
2008 2011 Change
Air temperature +8°C +5°C hockey / +6°C Figure Skating
Days with ice 258 days 315 days 22% increase
Booking hours 2,701 3,766 44% increase
kWh per day Approx. 4,100 Approx. 2,500 39% decrease
Total kWh used 1,385,816 1,263,352 8.8% decrease
Property of Renteknik Group Inc. All rights reserved
Working Together
• Renteknik has three levels of ClimaCheck Services that are offered
– Turnkey Solution to Clients: Scoping, Investigation (incl.
ClimaCheck system), Reporting, Project Management and Hand-off
Report
– Sub-consultant: Working for/with a Consultant to provide all or part
of the services above
– Product sales and technical support: Working with Contractors and
Consultants to spec appropriate ClimaCheck Systems and
providing technical support as the North American Technology
Integration Partner for ClimaCheck
Property of Renteknik Group Inc. All rights reserved
Other Services
• Onsite Energy Efficiency Assessments and Energy Audits• Energy Efficiency and Optimization Strategy/Recommendations• Guidance on available funding opportunities• Procurement and Installation of Metering Equipment• Energy Management and Building Automation Systems• Monitoring and Analysis of implemented measures• Energy Engineering and Energy Optimization
“Bridge the Road to Change”Energy Engineering and Energy Management Programs
Renteknik Group
Property of Renteknik Group Inc. All rights reserved
46
RenTeknik Group Inc.3228 South Service Road, Suite 301,
Burlington, Ontario, L7N 3H8, Canada
info@renteknikgroup.com
www.renteknikgroup.com
T: 905-634-3888 TF: 1-855-634-3888
For More Information Contact Us
Property of Renteknik Group Inc. All rights reserved
top related