ARUN®100 Solar Boiler / Solar Thermal concentrator
with Thermal Storage
at Ramkrishna
amkrishna Mission Students Home,
Chennai
Clique Developments Limited |149 BCD, First Floor, Government Industrial Estate, Charkop, Kandivali (W), Mumbai - 400 067
Phone:: +91 22 2860 9011 | Fax: +91 22 2860 9734 | Email: [email protected] | Website: www.cliquesolar.com
The Project
Ramakrishna Mission Students Home, Chennai wanted to install a solar thermal system to
reduce their dependence and incremental expenditure on LPG used for cooking.
Requirement as stated by the client:
o Heat / steam required for cooking breakfast, lunch, snacks, dinner for 700 students
o The project should be handled on turnkey basis including complete integration with
the existing system
o The solar thermal installation should occupy minimum footprint area
Requirement analyses by Clique Solar
o Breakfast preparation starts as early as 4 am. Thus, steam required during non-solar
hours as well
Recommendation made
1 ARUN®100 solar thermal concentrator with energy storage arrangement generating 540 kg of
steam/day during solar hours on a clear sunny day, satisfying the complete energy requirement
for cooking and hot water, resulting in 100% LPG fuel saving of 30 - 40 kg per day (depending on
the usage).
Installation of the Project:The system was commissioned on 26thOctober 2013.
Project highlights
• Steam available round the clock though provision given for energy storage. Steam
Storage has been provided for cooking breakfast at 4 a.m.
• System is installed on roof top of existing building
• Cooks about 2000-3000 meals per day
Project Summary
Date of Completion
Steam Delivery
No of meals cooked on solar
Average Fuel Savings
October 2013
7 bar steam / 170°C
About 2,000 to 3,000 meals on a sunny day
30 to 40 kg of LPG on a clear sunny day
Contact:
Abhishek Bhatewara | Clique Solar | M: 909 618 00002
Integration Schematic
Operating Philosophy
The basic aim of the control system in this integration scheme is to deliver steam to the existing
boiler header and excess steam to be delivered to thermal storage for non
non-solar hours
operation.
The ARUN dish automatically tracks the sun from morning to evening. The receiver coil at the
focus of the dish transfers the heat of the sun to the heat transfer medium (water). “The Steam
generation system with Storage” consists of ARUN®100 dish, thermal storage, pumps, valves,
etc. Once the system starts generat
generating
ing steam and required pressure is achieved, the steam is
delivered to the common header of existing boiler system. If there is reduction in steam usage
by the process (due to holiday, break, etc), the upstream pressure increases causing a valve to
open, thereby
hereby delivering steam to the storage tank. This process continues whenever the sun is
available. When the sun is not available, steam is first generated from the storage tank.
Thereafter the existing boiler system is turned on.
ARUN®100 Technology Details
Aperture Area
Footprint Area
Temperature Rating
104 sq.m.
3m x 3m = 9 sq.m.
Peak delivery of 350°C
Contact:
Abhishek Bhatewara | Clique Solar | M: 909 618 0000
00003
Thermal Output Rating
Tracking System
Estimated Life of System
Peak delivery of 3,50,000 kcal/day
Fully automatic two-axes tracking system
20 years +
Need for Thermal Energy Storage in Cooking
A typical energy requirement in
community cooking setting is
shown in the graph below in
blue line. The red curve shows
the energy generation with
solar system.
It is seen from the above graph
that there is a mismatch in
timings between the cooking
energy demand and solar
energy supply. The red shaded
area (solar energy delivered in
excess of requirement) is
stored in a thermal storage
tank. It is used at times when solar energy is not available for the cook
cooking
ing requirement (blue
shaded area).
Contact:
Abhishek Bhatewara | Clique Solar | M: 909 618 0000
00004