Change search
ReferencesLink to record
Permanent link

Direct link
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
2011 (English)Independent thesis Advanced level (degree of Master (Two Years)), 80 credits / 120 HE creditsStudent thesis
Abstract [en]

Modelling Polygeneration with Desiccant Cooling System for Tropical(and Sub Tropical) ClimatesAbstractSpace cooling has become a necessity in tropical countries. Maintainingcomfortable indoor conditions in industrial environments incur high energy bills due toheavy dependency on electrically operated air conditioning systems. In order to exploreways and means to improve the energy efficiency and alternative energy resources, afeasibility study was conducted using a transient simulation software TRNSYS toimplement a combined cooling, heating and power system suitable for a tropicalcountry.It is proven from the literature search that desiccant dehumidification inconjunction with evaporative coolers can reduce air conditioning operating costssignificantly since the energy required to power a desiccant cooling system is small andthe source of this required energy can be diverse.(Low exergy heat such as solar, wasteheat and natural gas)This research is conducted to evaluate the performance and applicability ofdesiccant cooling systems under tropical climatic conditions. Two operating modes;ventilation and recirculation modes of solid desiccants based open cycle air conditioningthat use waste heat from a CHP plant are analysed to understand their operatingranges, performances and applicability. The model developed is used to propose asuitable desiccant cooling system for a selected industry environment in Sri Lanka.Preliminary results obtained by a parametric analysis for weather data for Colombo, SriLanka shows 0.95 and 1.02 optimum coefficients of performance for the ventilation andrecirculation modes respectively when heat is available at 85°C. Based on thecomparisons of the analysis it is seen that the desiccant cooling appears to be a logicalsupplement for space cooling applications in tropical climates like Sri Lanka. And for thecase study taken to investigate can be proposed with a desiccant cooling system with ahot water storage as the energy supply and it can maintain a COP of about 0.48 undertropical weather conditions.

Place, publisher, year, edition, pages
2011. , 73 p.
Keyword [en]
Polygeneration, Desiccant cooling, Humidity ratio, Coefficient of Performance
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-43253OAI: diva2:448068
Subject / course
Energy Technology
Educational program
Master of Science - Sustainable Energy Engineering
2011-09-13, Mechanical Engineering Department Seminar room, The Open University of Sri Lanka, Colombo, Sri Lanka, Colombo, 12:30 (English)
Available from: 2012-05-21 Created: 2011-10-14 Last updated: 2012-05-21Bibliographically approved

Open Access in DiVA

Bakmeedeniya Lekha EGI-2011-105MSC EKV857(5350 kB)1058 downloads
File information
File name FULLTEXT01.pdfFile size 5350 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Bakmeedeniya, Lekha Udayanganie
By organisation
Energy Technology
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 1058 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 261 hits
ReferencesLink to record
Permanent link

Direct link