Undertaken by: Anirudh B

11MN01

PG Scholar

ME Energy Engineering

School of Energy PSG College of Technology

Mentored by: Dr.R.Velavan

Associate Professor

School of Energy

PSG College of Technology

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

Project Phase – I

Review -I

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.

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

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

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

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

Proposed Activity of research

Proposed Activity of research

S.no Equipment required Specifications Unit cost No. of

units

Total cost

(`)

1 Telecom cabinet 1 × 0.5 × 0.75m - 1 10000

2 Vapour Absorption

chiller (including

cooling tower)

Hot water based Vapour Absorption chiller - 0.5TR 25000 `/kW 1 50000

3 Solar Evacuated tube

collectors

Size:1.5𝑚2

Evacuated glass tube with selective coating

12500 `/m2 1 25000

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),

Phase change temp: 27 to 29oC

Density: 1150kg/m3, Operating range: 22 to 34oC

Latent heat: 190 kJ/kg

1000 `/kg 5 panels

(7kg)

7000

7 Thermocouples K-Type, Range: -200oC to +1350oC, Resolution: 0.1oC from -

200oC to 640oC, Accuracy: ±1oC

300 `/piece 10 Nos. 3000

8 Insulation Polyurethane foam insulation for both thermal storage tank

andtelecom cabinet

- - 2000

9 Labour + contigency - - - 10000

10 Total - - - 1,13,275

Milestone for completion