This document provides an overview of a project to develop a combined system of air cooler and water chiller. It includes an abstract, introduction, literature review, problem statement, objectives, working principles, calculations, results, conclusion and future work. The combined system aims to provide both chilled air and water to improve worker comfort in industrial settings. It is intended to be more efficient than separate air cooler and water chiller systems by using a single compressor. The document outlines the system components, calculations of performance metrics like coefficient of performance, and applications in places that require both cool air and water.

1. Development of combined system of air cooler and water chiller
Prepared by:-
Sanjay Neolia (151120119022)
Bhavesh Goyal (151120119012)
Abhishek Mishra (151120119001)
Prince Kumar (151120119031)
Guided by:-
Prof. Dharmesh Babariya
Assistant Professor,
Department of Mechanical Engineering
PSE, Surat
PACIFIC SCHOOL OF
ENGINEERING
1

2.  CONTENTS
 Abstract
 Introduction
Literature Review.
Outcome Of Literature.
Problem Statement.
Aim and Objectives.
Working Principle.
Calculation And Graph.
Result.
Conclusion.
Future Work.
Reference.
2

3. ABSTRACT
 The combined system of air cooler and water chiller is developed to provide better cooling
for air and water cooling. Nowadays we, observe that in industries, hospitals, staff room,
people gathering we require cool water and cool air for human comfort. So, in these places
like industries where production time plays a major role. This combined system will reduce
the ideal time for the workers in search of drinking water at a different station. This
combined system provide both chilled air and water at the desired place of the workshop and
also maintain the cool atmosphere around the workplace.
 This combined system also reduce electricity consumption because both arrangements work
on the same compressor. It also modified according to the use like cooling in a CNC
machine.
 The combined system of air cooler and water chiller is developed for providing better
cooling effect than the conventional air cooler. It also provides cold water for drinking
purpose comparatively at low cost than the water cooler. It also decreased the moisture
content of air coming through desert cooler up to some extent.
3

4.  INTRODUCTION
The main purposes of a developing combined system of an air cooler and water
chiller to make water cool as well as drinkable and provide comfort environment
for the occupants. Higher air temperature inside a building is found to reduce the
productivity of the occupants and increase the heat stress inside the buildings.
Higher temperature reduces feed consumption, weight gain.
 During the hot climate human needs more cold water. All these aspects demand
cooling of indoor air in hot climate zones, as well as cold water. Air cooling may
be a technique of achieving a indoor climate by reducing air temperature,
particularly within the arid region of the planet.
4

5.  Water chiller performance is measured in terms of coefficient of performance and
we have tried to increase the efficiency There are many factors which directly or
indirectly effect the performance like condenser temperature, evaporator
temperature, insulation etc. so we continued our project regarding effective use of
evaporator by the combination of two major aspects which are air cooler and
water chiller we tried to use the same evaporating for both purpose and also
achieve the better coefficient of performance.
Now a days, the equipment which produces refrigeration effects are on high
demand, for example refrigerators, air coolers, air conditioners etc. Mostly the
refrigerators are used to be seen in every house now days. The refrigerator is used
for preserving the foods and also for cooling the water and other beverages.
5

6.  LITERATURE REVIEW
6
Sr
no
Author Title of paper Objective Functions
1 Anil Kumbhar,
Nitin Gulhaneb,
Sachin Pandure
"Theoretical Analysis of Hybrid
Chiller"
By reducing the size of the compessor the high
electricity consumption is also reduced.
2 Ramesh
Kumar.
Heat and mass transfer of water
chiller.
By combination of the VCR and VAR system
the COP is increased by 23.05% which is
overall greater than VCR and VAR system.
3 Kyaw Thu,
Jayprakash
saththasivam.
Modeling and simulation of mass
recovery process in absorption
system for
cooling and Desalination.
The cooling capacity improvement is about 5%
for the operation a
170 c chilling water outlet.
4 Udhya kumar. Feasibility and design of solar
integrated absorption Refrigeration
system.
The heat rejection from the generator is reduced
by 38.94%.

7. 7
Sr
no
Author Title of paper Objective Functions
5. Francis
Boudehenn,
Sydvain
Bonnat.
Development and performances
overview of ammonia water
absorption chillers with cooling
capacity From 5 to 100kw.
They had improved the performance by which
the cooling load is decreases.
6. Kairouni &
Nehdi.
Energy conversation and
management.
The water is saved nearly 16LPS (liter per
Second).
7. Chung-Neng
Huang, Ying-
Han Ye.
Development of water-mist cooling
system : A12500 kcal/h air cooled
chiller..
Developed a newly supersonic mist-cooled
water chiller.
8. F.W. YUA,
K.T. Chanb,
R.K.Y.Sita.
Performance evaluation of oil free
chiller for building energy
performance
improvement.
They had investigated how to improve the
energy performance of central air-conditioning
by using oil free
Chillers.

8. 8
Sr
no
Author Title of paper Objective Functions
9. Yingde Yin
,Dongsheng
Zhu,jinfi Sun.
Experimental investigation of
evaporative condensed refrigeration
system by variant heat transfer tube
types.
They represent a paper in which an evaporating
condenser, where the tubes present experimental
investigation of heat transfer enhancement in are
remodeled with round, elliptical and twist types.
10. Fujen Wanga,
Hungmen
Linb,Weida tub
Energy modelling and chillers
sizing of HVAC system for a hotel
building.
They give the validation of simulation data and
field measurement data the energy efficient
chiller sizing approach and be obtained.
They revealed that of energy saving of 10.5%
can be achieved by optimizing the chiller
capacity sizing.
11. Martin Helm,
Kilian Pfeffer,
Stefen Hiebler
Solar heating and cooling system
with absorption chiller and latent
heat storage.
In this research project a novel system concept
for solar heating and cooling installation
comprising dry re- cooled sorption chiller and a
new low temperature latent heat
storage had been developed and tested.

9. 9
Sr
no
Author Title of paper Objective Functions
12. F.W. Yu K.T.
Chan
Improved condenser design and
condenser-fan operating for air
cooled chillers.
This paper describes how the cop of these
chillers can be improved by a new condenser
design, using evaporative pre-coolers and
variable-speed
Fans.
13. Andrew kusiak
, Mingyang Li,
Fan Tang
Modelling and optimization of
HVAC energy consumption and
work done by them.
A data-driven approach for minimization of the
energy to the air condition typical office-type
facility is Presented.
14. IAIN
STEWART,
LU AYE,
F.AIRAH
Global optimization of chiller
sequencing and load balancing
using shuffled
Complex evolution.
A new model has been developed to optimize
the sequencing and load balancing of chillers.
15. H.T.Chua,
K.C.Ng,
A.Malek
Multi-bed regenerative adsorption
chiller - improve the utilization of
waste heat and reducing the chilled
Water outlet.
The present study has demonstrated that it is
possible to improve the recovery efficiency of
low- grade waste heat via a multi-bed
Regenerative scheme.

10.  OUTCOME OF LITERATURE REVIEW
The outcome which are obtained form literature review is mainly focused on the
coefficient of performance and power consumption.
 In this literature review it is mainly define the variety of refrigerant used by
considering the effect of global warming and ozone depilation.
By reducing the size of compressor higher electricity consumption is reduced by
considering the fact that cooling will be not effected.
10

11.  PROBLEM STATEMENT
In massive cities, most of the matter is related to the house and high installation
value of cooling appliances. Therefore, of these appliances that square measure
within the market become unaffordable for the center category or for low-class
families..
The maintenance cost of these appliances is very high which makes them
unsuitable or we can say that unaffordable most of the times.
This appliance consumes large amount of water and electricity so for reducing
the use of these main sources research involves the use of VCRS system which
include eco- friendly refrigerant R134a in cooler system.
11

12. In many industries the workers are working in an environment which becomes
worst for working because of lack of ventilation air and drinkable water.
The workers or labors have to travel more distance for drinking water which
consume lot of ideal time.
In CNC machine during manufacturing process the tool get heated up due to
continuous machining process so it is necessary to cool the machine tool for
smooth manufacturing process
12

13.  AIM
All above discussed issue may be overcome by creating a best optimum
resolution by combination of air cooler and water chiller which may be
obtainable at low value and additionally doesn't consume additional power than
typical appliances.
Due to its low maintenance cost it can be buy to normal people. Gives more
standard results than traditional cooling devices.
Dual purpose can be served by using combined system of air cooler and water
cooler.
13

14.  OBJECTIVES
 To construct and erect model of combined system of Water chiller and Air
cooler.
 To measure temperature reading of inlet and outlet of water and air.
Calculate the coefficient of performance.
Increase the cooling rate.
Provide efficient cooling in room with less moisture content.
14

15.  WORKING PRINCIPLE OF WATER CHILLER
15
VCRs System :-
Vapour compression refrigeration cycle

16.  The vapor compression refrigeration system is the most popular and wide
utilized in refrige1ration and air conditioning for each industrial and industrial
application. it's usually used for all purpose from a tiny low domestic white
goods to a giant industrial air con plant.
 From evaporator once gaining the warmth the refrigerant convert into wet
vapour at air mass and temperature and goes into the mechanical device
wherever its temperature pressure will increase then it transfers into the
condenser (heat exchanger) wherever its temperature drops and pressure
remains constant then once it goes into growth valve wherever its pressure
reduces and refrigerant is born-again into the liquid state.
16

17.  WORKING PRINCIPLE OF AIR COOLER
17
Air cooler :-
Working Principle of air cooler

18.  The principle on that the air-cooler works is as follows- Water, once evaporates it
desires heat referred to as 'latent heat of evaporation'. Within the cooler, the water
that's sprayed over the pads once evaporates takes the desired heat of
transformation from the part air close them that on losing so the area temperature
drops creating the ambience within comfy. Its heat cools down. air is blown
within the area by the fan fitted on the cooler.
 The main components of the cooler are 1) Fan 2) Pump with water distribution
versatile pipelines 3) Porous pads unremarkably fabricated from special grass or
shavings of artificial material and a box fabricated from steel sheets on that the
higher than mentioned things are mounted firmly. This lower a part of the box
additionally is a cistern of the cooler. The cooler works terribly effectively once
the climatic conditions are hot and dry.
18

19.  In the wet condition, it's not effective. the explanation is in wet condition there's
very little or no water evaporation from the cooler's pad as a result of the
encompassing air is usually saturated with wet that doesn't enable more
evaporation of water from pad surfaces leading to abundant less loss of warmth
of the encompassing air thus much no cooling within the area the cooler is
serving.
19

20.  WORKING PRINCIPLE COMBINED SYSTEM
20
Combined system of air cooler and water chiller :-
Combined system of air cooler and water chiller

21. When the compressor is switch on refrigerant is compressed and its pressure
and temperature increase and then it goes into the condenser.
Then in condenser the refrigerant loses its heat and its temperature but the
pressure remains constant then it flows to the cooling coil through expansion
vale where the temperature and pressure both reduced.
The water in the tank get cooled by cooling coil by absorbing the latent heat of
water. Now this cooled water is used for cooling the tool of CNC machine,
drinking purpose etc.
Here the cooling coil is extended up to air cooler section where the moisture
from the cooling coil is mixed with air by which we get cooled air.
21

22. 22
 ISOMATRIC VIEW OF OUR MODEL ON SOLID WORKS

23. 23
 OUR ACTUAL MODEL

24.  IT IS DIFFERENT FROM EXISTING SOLUTION
AVAILABLE IN MARKETSr
No
Air cooler Chiller Combine system
1. It cools the ambient air.
It cools water at chiller
temperature.
It performs both tasks
simultaneously.
2. Wastage of water is more. No wastage water . No wastage water.
3. Less efficient. Fair efficient. More efficient.
4. Cost around 16000-20000/- Cost around 27000-30000/- Our cost 36350/-
5.
Temperature sensor is not
available.
Temperature sensor is
available.
Temperature sensor is
available.
6. It required more space area. It required more space area. It require less space area.
24

25.  ADVANTAGES
Compact in size.
Low power requirement.
Better result than traditional methods.
Low installing cost.
Low maintenance.
Portable and easy in handling.
25

26. 26
 DISADVANTAGES
 High Initial Cost.
 It required schedule maintenance.
 Chances of water leakage.
 Chances of over heating of compressor.
 Leakage of refrigerant can be occurs.

27.  APPLICATION
 Hospitals.
 Manufacturing companies.
 Public gatherings.
 Collage and Schools.
 Workshop.
 Banks.
 Public places.
 Canteen.
27

28.  CALCULATION AND GRAPH
Assumptions
o Condenser temperature remains constant.
o Evaporator temperature is not affected by ambient air.
o No intercooling, sub cooling, superheating.
 Observation
o Te = Evaporator temperature.
o Tc = Condenser temperature.
o P 1 = Pressure at the inlet of Compressor.
o P 2 = Pressure at the outlet of Compressor.
o h1 = Specific enthalpy at inlet in compressor (KJ/kg).
o h2 = Specific enthalpy at exit of compressor ( KJ/kg).
o h3 = Specific enthalpy at inlet of evaporator (KJ/kg).
o h4 = Specific enthalpy at the exit of Evaporator (KJ/kg)
o v1 = Specific volume (m3/kg).
28

29.  CALCULATION AND GRAPH
 Data table from graph
29
Te Tc P1 P2 h1 h2 h3 h4 v1
0⁰c
40⁰c
5bar 15bar 400 415 250 250 0.050

30.  Graph
o As we used R22 refrigerant so by plotting the observation data from the model.
o This graph represents specific enthalpy vs absolute pressure.
30

31.  PROCESS
 In compressor (during process 1-2 isentropic compression)
o Inlet is low pressure: low temperature saturated vapor
o Outlet is high pressure, high temperature saturated vapor
 In condenser (during process 2-3: Isobaric heat rejection)
o Inlet is high pressure, high temperature, saturated vapor.
o Outlet, low temperature saturated liquid is high pressure, low temperature saturated vapor.
 In expansion device (during process 3-4: isentropic expansion)
o Inlet is high pressure, low temperature saturated liquid.
o Outlet is low pressure, low temperature saturated liquid and vapor mix.
 In evaporator (during process 4-1: Isobaric and Isothermal heat extraction)
o Inlet is low pressure: low temperature saturate liquid and vapor.
o Outlet is low pressure low temperature saturated vapor
31

32.  CALCULATIONS
Mass flow rate (ṁ)
= Given refrigeration effect / calculated refrigeration effect
= kg/min
= 1.4 kg/min/TR
Piston displacement per TR using volumetric efficiency = 80% (Vp)
= ṁ x V1 / Ƞv
=
= 0.0875 m3/min/TR
 Heat dissipation in the condenser per TR (QR)
= ṁ(h2-h3)
= 1.4(415-250)
= 231 kj/min/TR
32
210
400 250

33. Work Done by Compressor
o Wc = h2-h1
= 415 − 400
= 15𝐾J/𝐾𝑔
 Refrigeration Effect
o Re = h1-h4 KJ/kg
= (400 − 250)
= 150 𝐾J/𝐾𝑔
 Coefficient of performance
o = h1-h3/h2-h1
o = 400-250 / 450-400
o COP = 3
33

34.  RESULT
Hence from the above calculations the coefficient of performance comes out to
be 7.5. Higher compatibility and portability are achieved which is more efficient
than other cooling units
34

35.  CONCLUSION
This project is very cheap and effective as compared with the conventional
cooler and water chiller system as it based on VCRs system. It has very low
power consumption which ultimately increases the cop of the system and
increases the cooling effect (refrigeration effect) of the system.
It is portable and it has very low effect on environment as it saves electricity and
water. One-time Installation procedure. The concept is very cost effective as
compared to air cooler and water chiller. It is very energy effective system.
35

36.  FUTURE SCOPE
Effective use of solar energy can be provided to the combined system such that
renewable energy is used in the place of conventional electricity (solar chiller).
This system can be used as cold storage for preservation of food and medicines.
We can install many other systems like Tea maker and Coffee maker machine in
this system.
Compact design can also be done to reduce the cost without effecting its
capacity.
Use of R134a refrigerant to reduce the global warming and ozone depletion.
Automatically operated circuits can be made to get the optimum result with
better temperature control and less electricity consumption.
36

37. 37
Progress Year 2018-2019
Dec Jan Feb Mar Apr
Selection of topic
√ √
Introduction and
literature review √ √
Selection of
components √
Specimen
preparation √
Testing of specimen √
 Work plan

38.  REFERENCE
[1] https://www.google.com/search?client=firefox-b-d&q=water+chiller [1]
[2https://www.google.com/search?client=firefoxd&tbm=isch&sa=1&ei=bGyzXL7aHtvw9QOxsJWwDQ&q=air+coole
r+image+&oq=air+cooler+image+&gs_l=img.3...20183.25600..26605...0.0.
[3] Journal of The International Association of Advanced Technology and Science Experimental Investigation of Water
Cooler System by Using Eco-Friendly Refrigerant.
[4] R.S Khurmi and J.K. Gupta, A textbook of Refrigeration & Air Conditioning, 2nd Edition, 2012., pg.
347,367,368,377.
[5] Arora & Domkudwar, A course in Refrigeration & Air Conditioning, 7th Edition, Delhi, Dhanpat Rai & Co, 2012.
[6] [6] Dr S.C. Kaushik, Mr N.L. Panwar, and Mr V. Reddy Siva, "Thermodynamic analysis and evaluation of heat
recovery through a Canopus heat exchanger for vapour compression refrigeration (VCR) system." Journal of Thermal
Analysis and Calorimetry, 2011, DOI: 10.1007/s10973-011-2111-7.
[7] Hui-qing LIU and Han-dong LIU, ―A fuzzy multi-attribute group decision-making model and its application to the
selection of air conditioning cold/heat source‖, International Conference on System Science, Engineering Design and
Manufacturing Information, Yichang, 2010, 1, pp. 151–154.
[8] P.K Nag “Heat and Mass Transfer”, 3rded. McGraw-HillEducation (India) Pvt. Ltd., 2013, pg. 570–580.
[9] Stocker & Jones, Refrigeration & Air Conditioning, McGraw-Hill Publication, pp.120-125.
[10] Ramesh Kumar and M. Udayakumar, Simulation studies on GAX absorption compression cooler, Energy
Conversion and Management 48 (2007) 2604-2610.
38

39. 39
[11] A. Ramesh Kumar and M. Udayakumar, Studies on compressor pressure ratio effect on GAXAC (generator-absorber-
exchange absorption compression cooler), Energy Conversion and Management 48 (2007) 2604-2610.
[12] https://www.google.com/search?client=firefox-b- d&tbm=isch&sa=1&ei=nWyzXNOoOJnwr1KWoBg&q=condenser [4]
[13] Y.J. He, Y.Y. Jiang, N. Gao, G.M. Chen and L.M. Tang, Theoretical analysis of a two-stage absorption-transcritical hybrid
refrigeration system, International Journal of Refrigeration 56 (2015) 105-113. [5]
[14] M. Fatouh and S. Srinivasa Murthy, Comparison of R22-absorbent pairs for vapour absorption heat transformers based on P-
T-X-H data, Heat Recovery Systems & CHP 13/1 (1993) 33-4.
[15] L. Kairouan and E. Nehdi, Cooling performance and energy saving of a compression-absorption refrigeration system
assisted by geothermal- energy, Applied Thermal Engineering 26 (2006) 288-294.
[16] Chua HT, Ng KC, Malek A, Kashiwagi T, Akisawa A, Saha BB. Multi regenerative adsorption chiller.Singapore patent
application no. 9804792- 1, 1998.
[17] Chua HT, Ng KC, Malek A, Kashiwagi T, Akisawa A, Saha BB. Entropy generation analysis of two-bed, silicagel±water
non-regenerative adsorption chillers. J Phys D: Appl Phys 1998; 31:1471±7. [7]
[18] Bhattacharjee K. Reducing energy cost in an industrial chilled water plant. Energy Eng 2007;107(4):42–51.
[19] Hydeman M, Zhou G. Optimizing chilled water plant control. ASHRAE J 2007;49(6):44–54. [8]
[20] Kairouan L, Hassairi M, Tarek Z. Performance of cooling tower in the south of Tunisia. Build Environ 2004; 39:351–5.
[21] Qureshi B, Zubair S. Prediction of evaporation losses in wet cooling towers. Heat Transfer Eng 2006;27(9):86–92. [9]
[22] Hartman T. Designing efficient systems with an equal marginal performance principle. ASHRAE J 2005;47(7):64–70. [10]
[23] M.W. Browne and P.K Bansal, Modelling of In-Situ Liquidchiller. International refrigeration and air conditioning. 2000 [11]
[24] M.W. Browne, 2000, An elemental NTU-s model for vapour- compression liquid chiller. International journal refrigeration.
24 ,2001 612-627 [12]
[25] K.T Chan, 2001, Energy performance of chillers with water mist assisted air-cooled condensers. International building
performance association 12th conference. [13]

40. 40
[26] K.A Manske, 2001, Evaporative cooling control in industrial refrigeration systems.International journal of
refrigeration vol 4 ,no 7,pp 676-691.
[27] C.V Le P.k Bansal, J.D Tedford, Three-zone system simulation model of a multiple chiller plants. Applied
thermal energy vol 24 2004, 1995- 2015. [14]
[28] Rhett David Graves.2003, Thermodynamic modelling and optimization screw compressor chiller and cooling
tower system.
[29] FuWin YU 2006, Efficiency improvement of air-cooled chillers equipped with Static conditions. International
refrigeration and air condition conference. [15]
[30] Zhang Xiasong, A novel energy saving method for air cooled chilling plant by parallel connection.Applied
thermal energy vol 26, p 2012- 2019,2006. [16].
[31] Rahman siddur, 2010, Energy economics and environmental analysis for chillers used in the office building.
Energy science and research vol 25 1- 16, 2010.
[32] Madhur Behl, Green scheduling for energy-efficient operation of multiple chillers. School of engineering and
applied science. 2012 [17]
[33] Sheng-Kai Wang, Improved energy performance of air-cooled chillers with innovative condenser coil
configuration. Part I: CFD simulation. International journal of refrigeration vol 35, 21993125,2012.
[34] Wu Chien Wu, Improved energy performance of air-cooled chillers with innovative condenser coil configuration.
Part ΙΙ: experimental validation. International journal of refrigeration. vol 35 2212-2222,2012.
[35] Ezenva Alfred, 2012., Design and adaption of commercial cold storage for the mudlike community.IOSR Journal
of engineering vol 25, pp 12341250.

41. THANK YOU…!!!
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