Upload
horace-french
View
213
Download
0
Tags:
Embed Size (px)
Citation preview
Ingegneria Senza Frontiere - Trento - Italy
Technology for human development:
sustainable management of geothermal resources
in South Peru
Feasibility study
Working Group of ISF: A. Tomasi, S. Nicolodi, G. Bertoldi, R. Wolf, A. Cemin, G. Guglieri, M. Grigiante, M. Ragazzi.
Preliminary questions
- Which development model have we in our mind ?
- Which development model have our project partners?
- How to negotiate between those different ideas?
A participative idea of cooperation !
Geographical Context
• Chivay - Department of Arequipa - South Perù.
• Poor mountain region between 3300 and 3800 m elevation.
• Cold climate, especially at night.
• Recent development of tourisms (but not everywhere).
• Canyon del Colca and hot springs.
• Public baths La Calera (used by tourist and local population).
Department of de Arequipa
Chivay
Resource available: renewable geothermal energy
Excess heat is loss in the environment
Two main hot springs used
(T= 69 C, flow of 4,9 e 1,8 l/s)
Several other natural hot springs
Thermal Baths La Calera in Chivay
Needs analysis (I)
Not completely used resource
Too high temperatures to bathing: cooling without heat retrieval
• Cool climate during night
• No heating in buildings.
Andamento delle medie mensili dei valori massimi e minimi di temperatura
-4
-20
2
4
6
810
12
14
16
1820
22
Gen Feb Mar Apr Mag Giu Lug Ago Set Ott Nov Dic
T [°C]
Tmax
Tmin
• Need of more hot not-thermal water for the thermal baths
Used only 3 of 5 available pools
Maximum and minimum mean monthly temperature
Needs analysis (II)
Do not exist any heating for the new hospital
(as for each public and private building).
Low temperatures can create health problems
Is it a primary or secondary need ?
Which culture feels this need?
Are there other priorities ?
Phase 1 (Italy): project design, preliminary analysis.
Phase 2 (Perù): local survey, technical data collection (October-December 2002).
Phase 3 (Italy and Perù): common development of the project (up to now).
Social feasibility leaded by El Taller
Phase 4 (Italy): financial resource collection
Phase 5 (Perù): project implementation
Development of a cooperation project
University of Trento
ISF-TN El Taller University of Arequipa
Environmental issues in the Caylloma District (Arequipa)
Waste treatment in Arequipa
Sanitation of mining pollution in
Colca Valley
Management of geothermal resources
Partners in Italy Partners in Perù
Technical possibilities
Using geothermal heat for:
• Whole village heating
• Heating of the new hospital
• Sanitary water for the hospital
• Increasing capacity of the existing thermal baths
• Use of exceeding heat for greenhouses
Preliminary technical survey by 2 students of Italy and 1 student of Perù
Local support given by El Taller and University of Arequipa
La Calera hot springsNew Chivay hospital
Water transport: 3 km insulated pipeline to Chivay hospital
General scheme of purposes
GEOTHERMIC RESOURCE
COLCA VALLEYCHIVAY WARM SPRINGS
New hospital Baths upgrading
greenhouses
Heat exchanges Search new hot springs
DAILY ENERGY NEEDS DURING THE COLDEST MONTH (JULY)
• Whole village heating: 102000 MJ/day
• New hospital heating: 4364 MJ/ day
• Sanitary hot water for the new hospital: 1072 MJ/ day
• Sanitary hot water for thermal baths: 1340 MJ/ day
Energy Budget
Available Energy:Available Energy:
64000 MJ/day64000 MJ/day
Heating the whole village is technically not feasible!
Hot water transport: appropriate technology?
COMMERCIAL SOLUTIONS (Socologstor)
ALTERNATIVE SOLUTION
Steal pipes with straw insulation:
•Cost : 13US$/m•Heat loss :0,9°C/km
•Easy substitution material, more people employing
Socopex System: PEX insulated pipes
•Cost: 36US$/m•Heat loss: 0,6°C/km•Easy construction
Bonded System : steal insulated pipes•Cost : 14,5US$/m + 22US$ for each junction•Heat loss : 0,7 °C/km
•Easy construction
New hospital heating
Plant characteristics
Heaters(simple technology)
Floor panels(new technology)
Water temperature: 35°CWater temperature:70°C
Is needed warm up water
Solar panels Gas boiler
Fuel saving: 2/3
Efficienza del collettore solare
0,00
0,10
0,20
0,30
0,40
0,50
0,60
0,70
0,80
0,90
10 20 30 40 50 60 70 80
Condizioni operative in funzione di tmf [°C]
Efficienza di captazione
Technical feasibility
Hospital Heating Hospital Heating
La Calera La Calera UpgradingUpgrading
HEAT EXCHANGE
First step
Floor panels heating (Water temperature less than 50 Celsius)
Uses of other hot springs
•Floor panels: is it an appropriate technology ?
•Are there technical capabilities for construction and management ?
•Is this solution economically and socially sustainable ?
Hot water Hot water transportation transportation
Next Step
Cooperation between ISF - El Taller - Municipality di Chivay - University of Arequipa
Creation of network of local actors
Social feasibility study: impacts of the project on the local contest… from technical project to community project …
Sharing the project with the local community
Expected results
•Better conditions in the hospital.
•Further development of hot baths (most important income in the village).
•Further development of tourisms (in a sustainable way).
• Improve knowledge on local resources (spring locations, amount and quality of water).
• Create a model of renewable resources using applicable in other places in Perù.
• Support collaborations among local groups.
• Peer contact between universities and students of both sides.
• Empowerment of both partners.
• Project as a continuous and long term process.
• Building strong partnership as a priority on starting project.
• Relevance of feasibility studies within the project cycle.
Point of discussion