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Techno-economic evaluation of solar-assisted heating and cooling systems with sorption module integrated solar collectors
Dalarna University, School of Technology and Business Studies, Energy Technology.
Dalarna University, School of Technology and Business Studies, Energy Technology.
2015 (English)In: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 70, 409-417 p.Article in journal (Refereed) Published
Abstract [en]

Currently the use of solar energy for heating and cooling isn't widespread. In order to reduce primary energy consumption in the built environment along with improving the thermal performance of the current building stock, retrofit solutions are required to utilise renewable energy. Using solar energy to reduce primary energy consumption is seen as a possible solution. With the precipitous fall in the prices of crystalline solar photovoltaic modules, utilising this technology to reduce electrical energy consumption for cooling is an attractive solution. Recently, a sorption module integrated collector has been developed in order to improve cost-effectiveness and simplify solar thermal heating and cooling systems. A techno-economic analysis has been performed to evaluate solar photovoltaic cooling and solar thermal cooling systems for residential renewable energy retrofit. The analysis is based on potential energy and cost savings according to simulated heating and cooling loads under climatic conditions of Madrid, Spain. Simplified models were used to determine heating and cooling demands and the solar energy contribution to heating and cooling loads. Additionally, given the sorption collector's unique capacity to store solar energy thermally and provide cooling at night an analysis has been carried out to identify the combined benefit of solar-assisted heating and cooling via photovoltaics during the day and solar sorption at night. For system sizes between 5m(2) and 20m(2) solar fractions between 16% and 64% could be achieved which translated to annual energy cost savings between (sic)153 to (sic)615. (C) 2015 The Authors. Published by Elsevier Ltd.

Place, publisher, year, edition, pages
2015. Vol. 70, 409-417 p.
Keyword [en]
solar cooling, sorption, photvoltaic, solar heating
National Category
Energy Engineering
Research subject
Energy, Forests and Built Environments
Identifiers
URN: urn:nbn:se:du-19011DOI: 10.1016/j.egypro.2015.02.142ISI: 000358196500051OAI: oai:DiVA.org:du-19011DiVA: diva2:846067
Conference
3rd International Conference on Solar Heating and Cooling for Buildings and Industry (SHC), OCT 13-15, 2014, Beijing, China
Available from: 2015-08-14 Created: 2015-08-14 Last updated: 2016-11-25Bibliographically approved
In thesis
1. Evaluation of a thermally driven heat pump for solar heating and cooling applications
Open this publication in new window or tab >>Evaluation of a thermally driven heat pump for solar heating and cooling applications
2015 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Exploiting solar energy technology for both heating and cooling purposes has the potential of meeting an appreciable portion of the energy demand in buildings throughout the year. By developing an integrated, multi-purpose solar energy system, that can operate all twelve months of the year, a high utilisation factor can be achieved which translates to more economical systems. However, there are still some techno-economic barriers to the general commercialisation and market penetration of such technologies. These are associated with high system and installation costs, significant system complexity, and lack of knowledge of system implementation and expected performance. A sorption heat pump module that can be integrated directly into a solar thermal collector has thus been developed in order to tackle the aforementioned market barriers. This has been designed for the development of cost-effective pre-engineered solar energy system kits that can provide both heating and cooling.

This thesis summarises the characterisation studies of the operation of individual sorption modules, sorption module integrated solar collectors and a full solar heating and cooling system employing sorption module integrated collectors. Key performance indicators for the individual sorption modules showed cooling delivery for 6 hours at an average power of 40 W and a temperature lift of 21°C. Upon integration of the sorption modules into a solar collector, measured solar radiation energy to cooling energy conversion efficiencies (solar cooling COP) were between 0.10 and 0.25 with average cooling powers between 90 and 200 W/m2 collector aperture area. Further investigations of the sorption module integrated collectors implementation in a full solar heating and cooling system yielded electrical cooling COP ranging from 1.7 to 12.6 with an average of 10.6 for the test period.

Additionally, simulations were performed to determine system energy and cost saving potential for various system sizes over a full year of operation for a 140 m2 single-family dwelling located in Madrid, Spain. Simulations yielded an annual solar fraction of 42% and potential cost savings of €386 per annum for a solar heating and cooling installation employing 20m2 of sorption integrated collectors.

Place, publisher, year, edition, pages
Västerås: Mälardalens Högskola, 2015
Series
Mälardalen University Press Licentiate Theses, ISSN 1651-9256 ; 222
Keyword
solar energy; solar heating and cooling; sorption integrated
National Category
Energy Engineering
Research subject
Energy, Forests and Built Environments, Reesbe företagsforskarskola
Identifiers
urn:nbn:se:du-20321 (URN)9789174852400 (ISBN)
Presentation
2015-11-26, Paros, Mälardalens Högskola, Västerås, 10:00 (English)
Opponent
Supervisors
Available from: 2015-12-01 Created: 2015-11-30 Last updated: 2016-03-16Bibliographically approved

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Citation style
  • apa
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