Applications in heating and cooling - ATMO · Applications in heating and cooling Energy saving effect of ejector technology Protecting lives, Preserving the planet ... DENSO ejector

Applications in heating and cooling

Energy saving effect of ejector technology

Protecting lives,Preservingtheplanet,andPreparingabrightfuture forgenerations tocome

DENSO Europe

Masataka Imazu

Pim Vernooij

Jennifer Yun

Contact:[email protected]@[email protected]

December 16, 1949EstablishedCapital € 1.4 billion

Net income€ 2.6 billion€ 1.2 billion

Consolidated basisNon-consolidated basis

(Japan 13, North America 4, Europe 4, Asia/Oceania 12, South America/Others 2)Affiliates under the equity method 32

(Japan 61, North America 28, Europe 35, Asia/Oceania 58, Others 6)Consolidated subsidiaries 188

Employees146.71438.493


Net sales€ 31.4 billion€ 17.8 billion


as of March 31, 2015


Corporateprofile

EnvironmentSafety Comfort & Convenience

Non Automotive

Notes:EUR€ amounts have been translated, for convenience only, at the rate of 123.63 yen = EUR€ 1, the approximate exchange rate prevailing on April 12, 2016. Billion is used in the American sense of one thousand million.



OutlineofEjectortechnology


Contact:[email protected]@[email protected] Protecting lives,Preservingtheplanet,andPreparingabrightfuture forgenerations tocome

Loosing energy duringexpansion as vortex

CompressorExpansion valve

Condenser（Gas cooler）

Evaporator

Isentropic line

⊿h

For Car air conditioner（in evaporator）

For CO2 refrigerantEcoCuteVending machine

For refrigerator truck（R404A）

For cool box

DENSOʼs original tech.Car air conditioner

Refrigerator truck

Cool box

DENSO Issue of traditional refrigerant cycle

AdaptingDENSO’soriginalejectortechnologytovariousproducts

EcoCute

DENSOproductswithrefrigerantcycle


EjectorcycleEjector

Driveflow Mixingsection Diffuser

PL

Ph

PSPd

Suctionnozzle

Gn

Ge

Pressure

Ph

PSPＬ

PdGn

GeGn＋Ge

VelocityGn

Ge

Gn＋Ge

Pressurerise

DrivenozzleRefrigerantCycle

EJEC

S®Ⅰ

EJEC

S®Ⅱ

Trad

ition

alEjectorcycle

CondenserCompressor

EvaporatorExpansionvalve

Ejector

Gn

AccumulatorGe

Gn

Ge Upwind evaporatorDownwind evaporator

Ejector： Fluid pump which suck and rise refrigerant flow by unused energy


DENSOejectorproductdevelopment‘03 ’04 ’05 ’06 ’07 ’08 ’09 ’10 ’11 ’12 ’13 ’14 ’15 à

Refrigerated truck（R404A)

Stationary products（CO2)

Car air conditioner（R134a)

●WorldfirstEjector

●WorldfirstCO2Ejector（EcoCute）

Vendingmachine

●EJECS®Ⅱ2temperatureevaporator

（EcoCute）

●EJECS®Ⅱ(Carairconditioner)

●EJECS®Ⅱ2temperatureevaporator

●EJECS®Ⅱ（STEP2）

CollaborationwithFujiElectric

●

●CO2 heatpumpwithejectorcycle(Stiebel Eltron WPL5N)

●Coolbox

World first mass production type ejector was released in 2003

Displaycabinet

StationaryAC


CO2 heatpumpwaterheater-EcoCute-



CO2 refrigerantcycle&EjectorforEcoCute

Gascooler

Compressor

AccumulatorEvaporator

ElectricdriveEjector

InternalHEX

Magnetvalve

Coil

Ejector

Driveflow

Suctionflow

Driveflow

Suctionflow

AdjustableneedleNozzle

Diffuser

Mixingsection

l EJECS®I (since2003)

l EJECS®II (since2008)

ElectricdriveEjector

ElectricdriveExpansionvalve



PurposeofadaptingEJECS®Ⅱ cycleEJECS®I EJECS®Ⅱ

Refrigerant cycleFrost on evaporator

Hightemp.

Lowtemp.

Partitionfrosttodownwind

sideConcentratedupwindsideLowtemp.

Refrigerant

TubeFin

Frost Airflow

Longerdefrostinterval


CO2 refrigerantvendingmachine



CO2 refrigerantcycleforvendingmachine

l Developedsystem

Thermistor

Gascooler

InverterCompressor

InternalHEX

Evaporator

InsideHEX

Compressor Accumulator Evaporator

EjectorGascooler

Inverter

InsideHEX

JointdevelopmentwithFujiElectric

InJapan,hot+cold vendingmachinesarecommon.

C o l dB e v e r a g e

H o tB e v e r a g e



NewcontrolschemeConventional■EcoCute

Controlhighpressure forheating

Developed■Vendingmachine

M

Gascooler

Compressor

AccumulatorEvaporator 1

Ejector

Evaporator2

Evaporator3

Controllowpressurebymonitoringejectoroutlettemp.

Issue

M

Gascooler

Compressor

AccumulatorEvaporator

Ejector Eachevaporatoroutlettemperaturearedifferent

Poorresponse

Stable refrigerant cycle control and COP improved was achieved


Energysavingeffect

Annu

alpow

erco

nsum

ption

（Co

mparedwith

tradition

alcycle

）

25%energysaving

Developedmodel(withejector)

Conventionalmodel(withoutejector)

25% energy saving was achieved by ejector→Top class energy saving comparable to HFO machine !

Measuringcondition：JISB8561:2007


Thankyouforyourattention!


Thank you very much!

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Applications in heating and cooling - ATMO · Applications in heating and cooling Energy saving effect of ejector technology Protecting lives, Preserving the planet ... DENSO ejector