Development of a thermal energy storage system in a domestic environment into the

GREENKITCHEN™ project

Nelson Garcia-Polanco1, Simone A. Zavattoni 2, Joaquin Capablo1, John P. Doyle1, Maurizio C. Barbato 2

1 Whirlpool R&D, Cassinetta di Biandronno 21024, Italy.2 Department of Innovative Technologies, SUPSI, Manno 6928, Switzerland.

INDEX

1. Introduction

2. Sources of wasted heat

3. Concept design of TES

Index

2

3. Concept design of TES

4. Experimental setup

5. Preliminary results

6. Conclusions

7. Acknowledgments and references

1. INTRODUCTION

3http://www.iapp-greenkitchen.eu/

1. INTRODUCTION

4

Partners:

2. Sources of Waste Heat

5

2. Sources of Waste Heat (2)

Type of appliance

Average energy

consumption

Wasted energy

TemperatureWaste heat

sourceAnnual uses

kWh/cycle Wh °C cycles/year

Electric ovens 1.25

95 34.5 Air-cooling cycle

110150 160 (cavity) Structure

160 41 Air-cooling cycle

250 250 (cavity) Structure

6

Microwave ovens

0.056 0.88 30 Air cooling cycle 1,200

Gas hobs 0.75 280 50÷450 Structure 438

Refrigerators and freezers

640 Wh/24h2,000

Wh/24h35÷50

(condenser)Air continuous

Washingmachines

1 550 30÷35 Water 220

Dishwashers 0.8÷0.95 230 40 Water 280

150

200

250

300

350

Po

we

r (W

)

2. Sources of Waste Heat (3)

0

50

100

150

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Po

we

r (W

)

time(hours)

Gas hobs

one hour

Gas hobs

7

3. Preliminary design

8

3. Preliminary design (2)

Latent Heat Storage (LHS)

Solid-liquid PCMMacro encapsulated organic PCM

Thermal Energy Storage with Phase Change Material (PCM)

9

Macro encapsulated organic PCMMean diameter capsules= 3-4 mm Melt point=32°CThe capsules are composed of 80% PCM, 20% capsule material.

4. Experimental setup

10

5. Preliminary results

Charge phase of the cycle

11

5. Preliminary results

12

5. Preliminary results

13

6. Conclusions

-An assessment of the waste heat produced by common appliances was done.

-A latent heat based Thermal Energy Storage (TES) system was developed, analyzed and tested.

14

-A macro encapsulated organic PCM, with melting point of 32°C, was selected as suitable and reliable solution.

-A real scale prototype was built and tested to evaluate its capability of storing and delivering thermal energy.

-The results of the preliminary tests show the potential of the energy storage system.

The Bauknecht GreenKitchen™refrigerator and dishwasher worktogether to save water and energyby reusing wasted heat from therefrigerator to preheat water in thedishwasher (A+++ Dishwasher).

6. Conclusions

15

REFERENCE

7. Acknowledgments and References

ACKNOWLEDGMENT

This work has been developed in the framework of the GREEN KITCHEN Project (Grant agreement no. 251600) funded by an EU FP7 Marie Curie Action.

16

REFERENCE

S. Zavattoni, N. Garcia-Polanco, J. Capablo, J. Doyle, M. Barbato. Household Appliances Wasted Heat Storage by means of a Packed-bed TES with Encapsulated PCM. 13th International Conference on Sustainable Energy technologies (SET2014).