1. Project Phase – I
Review -I
Development of green telecom networks by employing
Solar driven Absorption Chiller (SAC) - Phase Change
Material (PCM) Integrated Technology (SAPIT) for
cooling telecommunication shelters in India
Undertaken by: Anirudh B Mentored by: Dr.R.Velavan
11MN01 Associate Professor
School of Energy
PG Scholar PSG College of Technology
ME Energy Engineering
School of Energy
PSG College of Technology

2. Project motivation
The Indian Telecommunications network is the third largest in the
world and the second largest among the emerging economies of Asia
By March 2009 there were as many as 2,58,459 telecom towers in
the country and with a customer base of more than 600 million
subscribers in 2011, 1,50,000 more towers were installed to meet
the demand.
Erecting one telecom tower involves an investment of about Rs. 30
lakhs
Power consumed by a telecom tower varies from 1-5kW (24X7)
A telecom tower is installed with a DG set of 20kVA capacity running
16-20hrs (rural/semi-urban) a day , thereby consuming 4000lts per
year and emitting 10 tons of CO2 per year.
Out of which nearly 60% of the power is required for ventilation
requirements in the form of air-conditioning.

3. Literature Review
Design of a solar absorption cooling system in a Greek hospital
T. Tsoutsos , E. Aloumpi , Z. Gkouskos , M. Karagiorgas
Energy and Buildings (2009)
The authors have used Transient System Simulation Program (TRNSYS)
v.15 to simulate a hospital building in Greek to calculate its cooling
and heating demand and thereby designed a LiBr-H2O Solar absorption
cooling system and also made feasibility study based on economic
analysis.
Modeling of a solar powered absorption cycle for Abu Dhabi
A. Al-Alili, M.D. Islam , I. Kubo, Y. Hwang, R. Radermacher,
Applied Energy (2012)
The authors have modeled and studied the feasibility of implementing
NH3-H2O solar absorption cooling system for Abu Dhabi’s weather
conditions using TRNSYS

4. Literature Review
Solar Thermal Driven Cooling System for a Data Center in
Albuquerque New Mexico
N. Fumo, V. Bortone, J. C. Zambrano,
Journal of Solar Energy Engineering, ASME(2011)
The authors have done a theoretical analysis based energy, exergy and
cost of an absorption chiller driven by solar thermal energy as cooling
plant alternative for data centers
Design and performance of solar powered absorption cooling
systems in office buildings
Ursula Eicker, Dirk Pietruschka
Energy and Buildings (2009)
The authors have modeled and simulated the feasibility of
implementing LiBr-H2O solar absorption cooling system in office
buildings in Germany using TRNSYS

5. Literature Review
A second law analysis and entropy generation minimization of an
absorption chiller
Aung Myat, Kyaw Thu, Young-Deuk Kim, A. Chakraborty, Won Gee Chun, Kim
Choon Ng
Applied Thermal Engineering (2011)
The authors have done a performance analysis of an absorption refrigeration
system using entropy generation under transient conditions. Genetic
Algorithm was used as an optimization tool to locate the system minimum
under all defined domain of heat sources and cooling water temperatures
Optimization of a solar driven absorption refrigerator in the transient
regime
Mouna Hamed, Ali Fellah, Ammar Ben Brahim
Applied Energy (2012)
The authors have done a theoretical study in dynamic mode of an absorption
refrigerator endoreversible Model . A global minimizing time optimization is
performed in view to reach maximum performances. A mathematical model
combining the classical thermodynamics and heat and mass transfers
principles was developed

6. Identified research variables for future work
Optimization of Collector size
Collector inclination angle
Hot water flow rate
Hot water temperature
Chilled water temperature (inlet/outlet)
Chilled water flow rate
Type of Refrigerants
Types of Phase Change Materials
Concentration of LiBr-H2O
Solution flow rate
Cooling water flow rate

7. Proposed Activity of research

8. Proposed Activity of research

9. S.no Equipment required Specifications Unit cost No. of Total cost
units (`)
1 Telecom cabinet 1 × 0.5 × 0.75m - 1 10000
2 Vapour Absorption Hot water based Vapour Absorption chiller - 0.5TR 25000 `/kW 1 50000
chiller (including
cooling tower)
3 Solar Evacuated tube Size:1.5𝑚2 12500 `/m2 1 25000
collectors Evacuated glass tube with selective coating
4 Resistance heater 500W 2000 `/kW 2 4000
5 Thermal Storage tank 0.3m3 7500 `/m3 1 2275
6 PCM panels HS-29 (Inorganic salt) in HDPE panels (1000 × 160 × 16mm), 1000 `/kg 5 panels 7000
Phase change temp: 27 to 29oC (7kg)
Density: 1150kg/m3, Operating range: 22 to 34oC
Latent heat: 190 kJ/kg
7 Thermocouples K-Type, Range: -200oC to +1350oC, Resolution: 0.1oC from - 300 `/piece 10 Nos. 3000
200oC to 640oC, Accuracy: ±1oC
8 Insulation Polyurethane foam insulation for both thermal storage tank - - 2000
andtelecom cabinet
9 Labour + contigency - - - 10000
10 Total - - - 1,13,275

10. Milestone for completion