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

Cooling and Refrigeration System Analyzer

KNOW THE PERFORMANCE | MAXIMIZE THE EFFICIENCY

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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

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Did You Know?


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

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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

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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)


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 Equipment2 Pressure Sensors connected

at service ports

1 Electrical Input Sensor

7 Surface Temperature Sensors


• A thermodynamic evaluation produces an unbiased analysis

with no information about the system or compressor

required

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• 2 pressures sensors

• 7 temperatures sensors

• 1 power input sensor

Thermodynamic Model


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Quick Non-Invasive Sensor Attachment


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Sample Applications


• 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 Performance Analyzer


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


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

Pressure sensor on service port

Custom ClimaCheck SystemInstalled


Web Portal Sample–System Flow Chart


Web Portal Sample–System Table


Web Portal Sample–System Graphic


Web Portal Sample–User Settings


Web Portal Sample–Flag Settings


Web Portal Sample–Logic Settings


Web Portal Sample–Alarm Settings


Web Portal Sample–Power Profile


Web Portal Sample–Energy Statistics


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


Multiple Uses

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•Commissioning new systems

•Continuous monitoring

•Preventive maintenance

•Trouble shooting

•Decision support

•Real Time Performance inspection


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


• 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


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


Typical Findings

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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


Significant Savings are Achievable

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


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


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


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


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


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


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


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

• 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


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RenTeknik Group Inc.3228 South Service Road, Suite 301,

Burlington, Ontario, L7N 3H8, Canada

[email protected]

www.renteknikgroup.com

T: 905-634-3888 TF: 1-855-634-3888

For More Information Contact Us


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