Renteknik Refrigeration and Cooling Systems - Know the Perfromance | Maximize the Efficiency - linkedin

RenTeknik Group

Cooling and Refrigeration System Analyzer

KNOW THE PERFORMANCE | MAXIMIZE THE EFFICIENCY

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Property of Renteknik Group Inc. All rights reserved

Did You Know?

• 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

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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


• 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

World Wildlife Fund estimate global CO2
reduction in 2020 to 72 million tons from 50% of
4 market implementing improved service

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

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)

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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%)


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 Equipment
2 Pressure Sensors connected
7 Surface Temperature at service ports
Sensors

1 Electrical Input Sensor


Thermodynamic Model

• 2 pressures sensors
• 7 temperatures sensors
• 1 power input sensor

• A thermodynamic evaluation produces an unbiased analysis
with no information about the system or compressor
required

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Quick Non-Invasive Sensor Attachment

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Sample Applications

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ClimaCheck Performance Analyzer

• 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!

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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

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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

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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

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Sample Installations

Pressure and temperature sensors Temperature sensor

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Sample Installations

Current Transformers

Custom ClimaCheck System
Installed

Pressure sensor on service port
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Web Portal Sample–System Flow Chart

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Web Portal Sample–System Table

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Web Portal Sample–System Graphic

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Web Portal Sample–User Settings

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Web Portal Sample–Flag Settings

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Web Portal Sample–Logic Settings

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Web Portal Sample–Alarm Settings

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Web Portal Sample–Power Profile

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Web Portal Sample–Energy Statistics

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Applications

• Product and Systems Development • Troubleshooting

Leading manufacturers of systems for ClimaCheck provides fast
cooling and heating use ClimaCheck’s troubleshooting to minimize energy
solutions for quality assurance of consumption costs, repair time and
products and solutions down time

• Commissioning and Inspections • Preventive Maintenance and
When new equipment is being used for Service
the first time or when the warranty Predefined performance reports can
period is coming to an end, alert to possible imminent fails and
ClimaCheck’s solutions provides breakdowns making service and
assurance that equipment is operating maintenance easier and more
efficiently effective. Analysis of Performance
based maintenance vs. passage of
time
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Multiple Uses

•Commissioning new systems

•Continuous monitoring

•Preventive maintenance

•Trouble shooting

•Decision support

•Real Time Performance inspection

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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


What is the Process?
E N E R

• 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 maintained
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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


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
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Typical Findings

Common Identified Problems
Refrigerant shortage or over-charge
Compressor damage or wear
Fan/pump under performance
Fouling of heat exchangers
Flow problems on secondary media (air/water/brine)
Control problems
Incorrect superheat setting

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Significant Savings are Achievable

Historical savings using ClimaCheck PA
Supermarkets 20-30%
Heat pumps 10-30%
Ice rinks 20-40%
Industry 10-30%
Air Conditioning 10-30%

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Misconception About
ClimaCheck 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


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


Examples and Case Studies


Dual Compressor Chiller Example


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



• 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



• 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


Supermarket Case Study Results-Italy

• Resetting of system controls • Optimization and correction of
resulted in a drastic identified problems resulted in
improvement to the COP energy savings of 15-30% on
resulting in a 27% the refrigeration systems
improvement resulting in savings of over
• Refrigeration systems typically $415,000 annual electricity
use 50% of the total electricity costs
consumption of the store • The cost of analyzing the
• Total electrical consumption refrigeration systems was
of the Supermarkets was recovered during the first year
reported to have decreased by the energy savings and the
by 7 to 13% early detection of pending
compressor problems which
resulted in pre-emptive
maintenance instead of costly
failures


Case Study– Portland, Oregon, USA

• All 14 roof top units (27 compressors) analyzed were operating
outside of manufacturers specifications

Red = outside spec

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


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


Other Services

Renteknik Group
“Bridge the Road to Change”
Energy Engineering and Energy Management Programs

• 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


For More Information Contact Us

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

46 Property of Renteknik Group Inc. All rights reserved

Renteknik Refrigeration and Cooling Systems - Know the Perfromance | Maximize the Efficiency - linkedin

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