Heiden-2008SLC ASHRAESemina25 RHeiden Rev1

ARI 550 / 590WHAT IT IS, WHAT IT

ISN’Tan OEM perspective

Rick Heiden

Trane

Senior Engineer, Compressors

ARI 550/590 – What it is

• Performance rating standard self-regulated through collaboration of AHRI, ASHRAE, participating manufacturers and third party technical test loop auditors

• Means of maintaining a level playing field for certified performance ratings that customers and competitors can rely on

ARI 550/590 CERTIFICATION What it’s

not

• Not a guarantee of perfect performance– Instrument inaccuracy and machine variation are real

– Refer to ASHRAE Guideline 2 and 22 for examples of measurement uncertainty

• Not a guarantee of field performance – Benchmarking machine performance at commissioning is an

important step

– Installation details can significantly influence performance i.e. piping, operating condition variation, etc.

ARI 550/590 – What it is and isn’t SCOPE

Water cooled chillers

60Hz to 2000T*, 5000V

50Hz to 200T-1500T*, 5000V

* 2500T as of 7/2008

Air cooled chillers

60 Hz to 200T, 600V

50 Hz not covered

• NOT ALL APPLICATIONS

OR MACHINES COVERED

60 HZ WATER COOLED

100

1000

10000

100000

10 100 1000 10000

COOLING CAPACITY, TONS

VO

LT

AG

E

ARI

CERTIFIED

RATING

RATED N

ACCORDANCE

WITH ARI

Performance rating standard

– Rated parameter definition

– Method of Test per ASHRAE Standard 30 including

measurement accuracy requirements

– Standard operating conditions

– Allowable Test Tolerances

Certification Program

– Performance rating data (catalog or program) certified

by test audits

• 30% of model category are tested each year, models are

typically classified by compressor type and size

– FACTORY or LABORATORY test loop audit and

approval for use for certified performance testing

ARI 550/590 – What it is

ARI 550/590 What it is

PARTICIPANTSWater cooled – 7 participants

Air cooled – 7 participants

Performance Ratings– Capacity

– Energy efficiency

– Water pressure drop

– Full & Part Load Values

– Integrated Part Load Value

– Non-standard Part Load Value

TEST LOOP APPROVAL What it is

Approval of test loop for use in certification performance testing

Test loop is audited by a third party for approval

Audit process includes:

– Auditor installed redundant temperature and power measurements and

data acquisition system

– Review of NIST traceable calibrations

– Verification of heat balance

– Verification of selected model unit performance

• 4 points, IPLV and “surprise” 5th point

TEST LOOP AUDITWhat it is

Measurements– LEWT*

– EEWT*

– LCWT*

– ECWT*

– GPMC

– GPME

– kW*

– dPC

– dPE

* Audited

PERFORMANCE TESTING What it

is

30% of model category tested per year

– For example 15 model categories 5 tests per year

– Must not overlap categories year over year so in practice entire model line is tested every 3

years

– ARI ultimately selects units to be tested

Performance data is verified to match certified data

– 100, 75, 50, 25% load point selections and IPLV calculation made ahead of time using

manufacturers selection software or catalog data (ARI maintains current revisions)

– Performance data submitted by manufacturer is verified to match certified data

Audit testing

– Test day arrives along with a “surprise” 5th point

– Water temperature offsets made to maintain compressor lift accounting for “clean tube” tests

with no fouling

– STEADY STATE tests are conducted per test method

– Performance data is compiled and compared against selection data and allowable

tolerances for approval

PERFORMANCE TESTING What it

is

Water cooled offsets for field tube fouling

– ECWT

– LEWT

TOLERANCES, ACCURACY &

UNCERTAINTY

Parameter Tolerance *

ARI 550/590

Accuracy

ASHRAE 30

Measurement

Uncertainty *

Temperature, ΔT 0.5ºF 0.2ºF

Flow 5.0% 1.0%

Pressure ≤ 115% rated 0.5% FS

Power n/a 0.5%

Capacity - 5.0% 2.97%

COP - 5.0% 3.00%

* Full Load 500T, 6.39 COP, 44/85 LEWT / ECWT, 10ºF ΔT, 2.4 GPME/T, 3.0 GPMC/T

ARI 550/590 – What it’s not

Does not cover all applications

• heat recovery

• free cooling

• evaporator fluids other than water

• high voltage

Not a replacement for field benchmarking

• Traditional methods, logging

• Chiller plant efficiency using GPC 22

• Field performance using upcoming Standard 184

ARI 550/590 – What it is, recap

• Performance rating standard coupled with an industry-regulated Certification Program audited by an independent third party

• Means of maintaining a level playing field for certified performance ratings that customers and competitors can rely on

• There are many approved test loops in industry providing an excellent means of benchmarking machine performance at high accuracy and reasonable cost