An ejector refrigeration cyclepowered by an internal combustion engine

Reporter: Chenliang

Professor : Sumin Jin

CONTENT

Part One

Introduction

Part Two

Working principle

Part Three

Performance of an ejector

refrigeration

Part Four

References

Total energy consumed

China is now the world second largest energy producer and

consumer

Annual growth

rateThe average annual growth rate of energy

consumed is up to 5.9%

Comprehensive utilization of energy High energy consumption

per unit of outputIts value is 8.7 times, 4.9

times and 2.5 times that of the Japan , European Union

and United States.

18%

5.9% 33%

Introduction1

1

Solar energy

2

Geothermal energy

3

Internal combustion engines

4

Waste heat from industrial processes

Introduction1

Introduction1

Thermodynamic analysis

Computational fluid dynamics (CFD) analysis

experimental research

Predict the performance of ejector , different refrigerant, structure parameters of

ejector , nozzle position, multistage injection system

喷射制冷——各类学术发展趋势曲线图

Introduction1

CONTENT

Part One

Introduction

Part Two

Working principle

Part Three

Performance of an ejector

refrigeration

Part Four

References

Working principle2

Working principle2

1

2

3

These systems are more reliable because there have almost no moving part.

They have more potential to be environmental friendly.

Especially, water can be used as refrigerant.

They are relatively inefficient.In an ejector refrigeration cycle, the key problem is the ejector design.

Working principle2

CONTENT

Part One

Introduction

Part Two

Working principle

Part Three

Performance of an ejector

refrigeration

Part Four

References

Performance of an ejector refrigeration 3

Refrigerant :R141b

Heat resource: exhaust gases

Inlet of generator:251.95℃, 100KPa,

0.253kg/s

Outlet of generator:98℃, 100KPa, 0.253kg/s

Cooling water:

Tcond,inlet=-5℃, Tcond,outlet=-2℃

Chilled water：

Teva,inlet=-5℃, Teva,outlet=-2℃

Performance of an ejector refrigeration 3

The refrigeration capacity and coefficient of performance increases as the

evaporator temperature increases and increase as the generator temperature

increase.

Performance of an ejector refrigeration 3

1. The refrigeration capacity decreases as the condenser temperature

increases.

2. The exergy efficiency decreases as the condenser temperature increases.

Performance of an ejector refrigeration 3

The exergy efficiency and product unit cost at this point are obtained as 3.095%

and 201.7$/GJ, respectively.

Performance of an ejector refrigeration 3

1. Generator and ejector have highest exergy destruction.

2. Total exergy destruction and exergy loss from the system to ambition are

91.96% and 4.95%, respectively.

Performance of an ejector refrigeration 3

Conclusions

1. When the ejector refrigeration system works at a generator, a condenser and

an evaporator temperatures of 94.54, 33.44 and 0.03 ℃, respectively, the

system has an optimal performance.

2. the product unit cost for the present work, obtained under optimized

condition, is 201.7 $/GJ which is comparatively more expensive than the

corresponding value for the absorption refrigeration systems.

3. The product unit cost for the present work, obtained under optimized

condition, is 201.7 $/GJ which is comparatively more expensive than the

corresponding value for the absorption refrigeration systems.

CONTENT

Part One

Introduction

Part Two

Working principle

Part Three

Performance of an ejector

refrigeration

Part Four

References

References4

1. 房煦峰 . 潜热回收型喷射式制冷性能分析及喷射器数值模拟 [D]. 大连海事大学 , 2014.

2. 董景明 . 高效喷射式制冷系统性能的理论与实验研究 [D]. 大连海事大学 ,

2012.

3. Chen J, Havtun H, Palm B. Conventional and advanced exergy

analysis of an ejector refrigeration system[J]. Applied Energy,

2015,144:139-151.

4. Sadeghi M, Mahmoudi S M S, Khoshbakhti Saray R.

Exergoeconomic analysis and multi-objective optimization of an

ejector refrigeration cycle powered by an internal combustion

(HCCI) engine[J]. Energy Conversion and Management,

2015,96:403-417.

Thank you for watching

Reporter: Chenliang

Professor : Sumin Jin