NAESCO WEBINAR - APRIL 19, 2021

NAESCO WEBINAR - APRIL 19, 2021

April 19, 2021 Webinar


WHY ENGINEERS FAIL TO IDENTIFY GREAT SAVINGS OPPORTUNITIES FOR COOLERS

AND FREEZERS?

HOT TO ADD MORE VALUE TO PROJECTS!


WHY I LOVE WHAT I DO

Presented by Emre Schveighoffer, CEO & FounderNational Resource Management, Inc.

PERFORMANCE, EFFICIENCY AND OPTIMIZATION OF REFRIGERATION SYSTEMS FOR ESCO PROJECTS


Brief Agenda

❑ Doing a walk through – what to look for when you see walk-in cooler or freezer

❑ Identify & qualify potential refrigeration measures

❑ How to predict energy savings

❑ User experience is important and good discovery will help sell the project

❑ Some example case studies

❑ M&V must be easy to document savings – controls don’t wear out have long life

❑ Live demo – how past clients use and benefit from solution


Possible Poll QuestionsOn a scale of 0-5, what is your level of knowledge on refrigeration?

0 1 2 3 4 5

(Or this one) When it comes to refrigeration?

I understand and know how to evaluate

I can identify opportunities but have hard time to know if it is worth chasing

I don’t know what I don’t know so I pass by

Do most of your projects typically have a potential refrigeration opportunity?

Yes No

If you do address refrigeration, what are you currently including?

EC motors anti-sweat control smart control EMS type control New refer unit

What is the typical payback a measure need to meet for cost effectiveness?

3-years 5-years 7-years 10-years 12-years 15-years

TYPICAL ESCO PROJECTS WE WORK ON

K-12

Higher Ed

Hospitals

Correctional

Federal

Pharmaceutical

Sports Arenas

Cold Storage


Jan Feb Mar Apr Jun Jul Aug Sep Oct Nov Dec

Co

olin

g C

apac

ity

Design Capacity

Required Capacity

Deteriorated Capacity

Savings Opportunity = Area above the demand

curve, below the capacity line

Excess capacity = greater savings

Why, How and When savings are realized


Have you ever lost food in your cooler or freezer?

Is your kitchen run by a vendor or in-house? Who is accountable?

Who is responsible for food safety, and do they manually log temperatures?

How old is the refrigeration equipment in your cooler & freezer?

Have you implemented energy saving projects for your refrigeration?

Discuss benefits other than energy savings that will make their life better

Having that conversation increases desire and buy in… gets them to consider a refrigeration solution

Key is to discover what their PAIN and offer a PROVEN solution?

DISCOVERY QUESTIONS DURING WALKTHROUGHWITH CLIENT WHEN REFRIGERATION IS IDENTIFIED

EXPERIENCE = LESSONS LEARNED

50,000+ SYSTEMS RETROFITTED IN 26+ YEARS

Walk-in coolers & freezers

Primary need from refrigeration system – keep it running

Refrigerated warehouses

Laboratory cold rooms

High risk areas with high value products

OUR CLIENTS SAY PEACE OF MIND IS MAIN BENEFIT


REALWORLD FACTS ABOUT DESIGN

How are refrigeration systems sized?◦ It really depends on who designed it◦ One size fits all mind setWhy is the end user or operator important?


WHAT A SOLUTION SHOULD INCLUDE

Proven and verifiable long-term energy savings – data logging in controller

Typical energy savings achieved for refrigeration is 30-40%

Demonstrated Operational improvements:◦ Performance optimizations that reduce runtimes

◦ Needs-based cooling schedules

◦ Replace motors with EC motors (where applicable)

◦ Anti-sweat door heater controls based on dew point

◦ On-Demand electric defrost

◦ A cache of equipment and temp. alerts

User-friendly for operators, technicians and ESCO engineers


Dedicated Smart Controllers


Strategies - Smart Fan Controls

• Fans are cycled when cooling is off using preset temp points

& schedules

• Can reduce evaporator fan runtimes by up to 75%

• Reduces wear and tear, extend equipment life

• Reduces noise levels for staff when in cooler

• Protects compressor when fans fail or shut off

• Operators will become raving fans of the project


Anti-Sweat Door Heater Controls

Door heaters operate based on dew-point settings

Using solid state relays, heater circuits are cycled every second

Can reduce annual energy use by heated doors up to

90%* on cooler and up to 40% - 60%* on freezer

*Based on location of the doors within the space


Timed Shutdown Button

Safely turn off fans for 20 mins for in-cooler tasks:

◦ Deliveries

◦ Taking inventory

◦ Stocking

Helps prevent fans from being manually turned off and then being

forgotten about

Reduces energy waste when doors are open during deliveries


Electric Defrost/On-Demand Defrost

Demand defrost vs timeclock

Defrost is initiated based on compressor run times

Using thermostatic defrost – the termination sensor is used to

limit temp rise during defrost


Demand Defrost & T-stat Examples


System Bypass

Retain existing controls to provide both redundancy and easy

troubleshooting

Bypass safely sets cooler control back to its original thermostat and

prevents misdiagnosing issues

Allows technicians to troubleshoot without jeopardizing

operational data and system settings


Stored Operational Data

• At least 10-years worth of operational data on Micro SD card

– Downloading historical operating data makes it easy to identify failures or

intermittent issues when reat-time connection is not possible

• Temperature sensor logs

• Equipment Runtime logs

• Easy to calculate savings from pre and post run times


Equipment & Temperature Alerts

• Quickly alerts local staff if temperatures drift out of range

• Flashing screen on controller and optional strobe so alarm

doesn’t go unnoticed

• Mobile and email notifications available when connected to the

cloud


Integration with ESCOs BAS

• Can be connected to an existing BAS

• Modbus TCP/IP

• BACnet w/translator

• Advantage Navigator (Siemens)

• Ethernet port to connect to cloud platform


M&V options A. Copy data from Micro SD to PC and convert data into CSV/Excel table

B. Connect to BAS, BAS needs to be configured to retrieve and convert data

C. Other cloud-based platforms (check if applicable)

D. Advantage Navigator (Siemens)


TYPICAL CLOUD PLATFORM

EXAMPLE OF CLOUD PLATFORM

Cloud-based 24/7 Equipment Supervision

Real-Time Performance Metrics

Summary Page for all Zones

Automated Temperature Logging

Instant Email or Text Notification

Mobile Access to Data and Settings





How-to video: Walk-in Cooler Audit

In this video you’ll learn:

• The general locations of the thermostats, evaporator fans, and door heaters

• Where the nameplates are and the info we need

• Any potential obstacles for the installation


https://youtu.be/tXzYjrTD6Fg (6:37 running time)

https://youtu.be/tXzYjrTD6Fg

https://youtu.be/tXzYjrTD6Fg

How-to video: Condenser/Compressor Audit

(1:33 running time)https://youtu.be/tMM3qL-fwfs

In this video you’ll learn:

• Where the condenser/compressor units are in relation to

the walk-in

• Where the nameplates are and the info we need from them

https://youtu.be/tMM3qL-fwfs

Common installation challenges

Waiting for kitchen staff to authorize and begin the installation

A clear path in the walk-in to access the evaporator fan sets

Walk-in door is locked

Installation interrupted by deliveries

Walk-in space is too full to perform install


Some Factors that Impact Pricing

Project location

Type of facility

Prevailing wage or prevailing wage with Union labor

Installation shift schedule, i.e. 1st, 2nd or 3rd

Security level or difficulty gaining access to facility

Tamper proof enclosure or specialty hardware (as needed)


Case study: Capital Community College

Total Project Cost (Parts & Labor): $13,075

Cost per zone controlled (3): $6,985

Cost to replace motors (4): $1,100

Cost for door heater controls (2): $2,090

Cost for other measures: $2,900

Utility Incentive: $6,537.50 (50%)

Net Cost to Customer: $6,537.50

Annual kWh Savings: 20,900 kWh

Annual Savings (@ $0.12/kWh): $2,680

Payback Period: 2.44 years


Case study: Hopkinton Schools

Total Project Cost (Parts & Labor): $14,390

Cost per zone controlled (3): $6,985

Cost to replace motors (4): $1,100

Cost for door heater controls (2): $2,090

Cost for other measures: $2,900

Utility Incentive: $0 (0%)

Net Cost to Customer: $14,390


Annual Savings (@ $0.16/kWh): $2,380

Payback Period: 6 years


Case study - Harvard Biology Building

Total Number of Cold Rooms: 34


Annual Energy Savings: $19,800

Utility Incentive: 50%

Simple Payback: 1.45 years

Implemented Measures: Controls

80 motors upgraded to EC motors

Anti-sweat door heater controls


Real Time View: What the client can see and do

We will go to www.remotesitemanager.com

❑ Monitor temperatures and operational statistics

❑ Manage and make changes to refrigeration control parameters

❑ Start a needed defrost from any smart device

❑ FAULT DETECTION – Energy waste can be alarmed

❑ Set and receive alerts for both temperature and equipment

❑ Enjoy Peace of Mind


http://www.remotesitemanager.com/

Q & A


Contact information

Juan RiveraESCO Business Development ManagerOffice: 781-828-8877 Ext. 104Mobile: 508-254-6783email: [email protected]

Emre Schveighoffer, PresidentOffice: 781-828-8877 Ext. 101Mobile: 617-212-5424Email: [email protected]


mailto:[email protected]

mailto:[email protected]

Questions Tim can ask1. What happens if your controller fails or loses power?

2. How can we get a hold of someone if we see an issue?

3. Does the walk-in need to be empty before the installation?

4. How long does installation take for each cooler?

5. Does the system void any warranty?

6. Will their contractor still be able to service their equipment?

7. Do operators need special training on the smart controllers?

8. Pertaining efficiency, what does the real-time alarm system look for?

NAESCO WEBINAR - APRIL 19, 2021

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