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Kvartal 2, 2010

Publications:

 

-  Javed, S, 2010. Design of ground source heat pump systems - Thermal modelling and evaluation of boreholes.  Licentiate thesis, Division of Building Services Engineering, Chalmers University of Technology, Sweden.

 

-  Javed, S, Claesson, J and Fahlén, P, 2010. Analytical modelling of short-term response of ground heat exchangers in ground source heat pump systems. 10th REHVA world congress; Clima 2010, May 9-12, Antalya, Turkey.

 

-  Javed, S and Fahlén, P, 2010. Development and planned operation of a ground source heat pump test facility. Newsletter IEA heat pump centre, vol. 28, no. 1/2010, pp. 32-35. 

 

Meetings and Presentations:

 

A project group meeting was held during these quarters.

 

Following presentations were also made.

 

- Javed, S., 2010. Project Update. (Project group meeting, 2010-03-09), Gothenburg.

 

- Javed, S., 2010. Short Term Response of GHEs. (Project group meeting, 2010-03-09), Gothenburg.

 

- Javed, S., 2010. Thermal Response Testing of Laboratory Boreholes. (Project group meeting, 2010-03-09), Gothenburg.

 

- Javed, S., 2010. Analytical modelling of short-term response of ground heat exchangers in ground source heat pump systems. (Clima 2010, 2010-05-10), Antalya, Turkey.

 

- Javed, S., 2010. Optimization od GSHP systems. (Effsys day, 2010-06-10), Gothenburg.

 

- Javed, S., 2010. Design of ground source heat pump systems - Thermal modelling and evaluation of boreholes. (Licentiate Presentation, 2010-06-11), Gothenburg.

 

 

Kvartal 4, 2009

Research:

 

The short-term response of the boreholes was investigated.  New analytical  and numerical model to determine the short-term response of the GHE have been developed.  An abstract titled "Analytical modelling of short-term response of GHE in GSHP systems" was submitted to Clima 2010.

 

Meetings and Presentations:

 

A project group meeting was held during this quarter. Following presentations were made during the meeting.

 

     Javed, S., 2009. Project Update. (Project group meeting, 2009-12-09), Gothenburg.

 

    Claesson, J., 2009. Thermal response test. (Project group meeting, 2009-12-09), Gothenburg.

 

In addition, following presentation was also made at Effsys day.

 

    Javed, S., 2009. Optimization of GCHP systems. (Effsys day, 2009-12-14), Stockholm.

 

 

Experiments:

 

Thermal  response testing  of the laboratory boreholes was initiated.

 

Kvartal 3, 2009

 

Research:

 

Following paper was presented at SET2009 conference.

 

Javed, S., Fahlén, P. and Holmberg, H., 2009. Modelling for optimization of brine temperature in ground source heat pump systems. Proceedings of 8th international conference on sustainable energy technologies; SET2009, Aachen, Germany. August 31- September 3.

 

Meetings:

 

A project group meeting was held during this quarter. Following presentations were made during the meeting.

 

Javed, S., 2009. Thermal response test. (Project group meeting, 2009-09-09), Gothenburg.

 

Javed, S., 2009. Project Update. (Project group meeting, 2009-09-09), Gothenburg.

 

Presentations:

 

Following presentations were also made.

 

Javed, S., 2009. Project Update. (Effsys board meeting, 2009-09-29), Gothenburg.

 

Javed, S., 2009. Trnsys modelling of our lab system. (PhD course at Darlana university, 2009-09-04), Darlana.

 

 

Projektpresentation på styrelsemöte 2009-09-29

 

Kvartal 2, 2009

 

-  Following paper was presented at Effstock confernce.

 

  Javed, S., Fahlén, P. & Claesson, J. 2009. "Vertical ground heat exchangers - A   review of ehat flow models". Proceedings of 11th International Conference on   Thermal Energy Storage; Effstock 2009 - Thermal Energy Storage for Energy   Efficiency and Sustainability, Sweden.

 

 - An abstract based on the research work was submitted to SET 2009 conference.

 

 - Thermal response test for the boreholes at the laboratory was planned.

 

Kvartal 1, 2009

 

- Modelling work to develop new analytical models continued during this period. Simulations based on existing ground heat exchange models were also carried out.

- A meeting with the project group was held during this quarter. The initial modelling work of the new analytical models and the project update were presented during this meeting.

- An article was submitted and accepted for the Effstock 2009 conference.

- Commissioning of the laboratory was initiated.

 

Education:

A course titled "Perspectives of Energy systems” was successfully taken.

Presentations: Following presentations were made during this period.

1. Javed, S., 2009. Optimization of GCHP systems - A project update. Göteborg, Sweden.

2. Claesson, J., 2009. New analytical models for GHE. Göteborg, Sweden.

Kvartal 4, 2008

Research: Modelling work to develop new analytical models for the ground heat exchangers was carried out. The work will continue for next 2-3 quarters. Two meeting with the project group were respectively held in October and December. The current status of the research was reported in these meetings and the feedback from the partner companies was taken.

Two abstracts based on the research work were submitted to the Effstock 2009 conference. Commissioning plans and Initial experiments for the newly developed laboratory systems were developed.

Education: A course titled "Air conditioning, refrigeration and heat pump technology” was successfully taken.

Presentations: Following presentations were made during this period.

1. Javed, S., 2008. Modelling of Ground Heat Exchangers. Göteborg, Sweden.
2. Fahlén, P., 2008. Planning of Laboratory Research Activities. Göteborg, Sweden.
3. Hellström, G., 2008. Duct Storage Model for Ground Heat Exchngers, Göteborg, Sweden.
4. Javed, S., 2008. Optimization of Ground Source Heat Pump Systems. Göteborg, Sweden.
5. Javed, S., 2008. Modelling of Heat Pump Systems. Göteborg, Sweden.
 

EFFSYS2 dagen 2008-11-11 presentationsmaterial   poster

Kvartal 3, 2008

Research: Based on the literature survey various analytical models of ground heat exchanger were simulated using MATLAB-SIMULINK.

Laboratory: A borehole field consisting of 9 boreholes, each 60 m deep, was drilled. The borehole field is integrated to 3 heat pumps and four storage tanks to simulate different building load patterns to validate various analytical and numerical models and control schemes.

Presentations: A literature review report is being written to report the state of art. Two article abstracts were also sent for EFFSTOCK 2009 conference. Various presentations made till date are listed below.

1. Javed, S., Fahlén, P., 2008. Overview of 2007 – Optimization of GCHP systems project. Göteborg, Sweden.
2. Javed, S., Fahlén, P., 2008. Lab Plans, Investigation Points and Partner’s Feedback. Göteborg, Sweden.
3. Javed, S., 2008. Optimization of GCHP systems. Venice, Italy.
4. Javed, S., 2008. Presentation of Optimization of GCHP systems Project. Copenhagen, Denmark.
5. Fahlén, P., 2008. Efficiency of Heat Pump Systems. 9th International IEA Heat Pump Conference, Zurich, Switzerland.
 

Kvartal 2, 2008

Meetings: A meeting was held on 2008-04-10 with participation from many collaborating companies. The participants were presented with an overview of the project work done in 2007. The participants were also briefed about the laboratory that is being built to facilitate the project. Finally, the investigation points based on literature review and participating companies’ feedback were presented and discussed.  

Laboratory: A borehole field of 9 boreholes, each 60 m deep, is being planned and will be drilled in late august. The boreholes will be coupled with 3 heat pumps and will enable the researchers to investigate theoretical models and practical control schemes.

 Academics: Various academic courses including a detailed course in Modelling with IDA, an international course regarding HAM modelling (Heat, Air, and Moisture transport), and another international course regarding Integrated HVAC systems were undertaken to build up the theoretical background required for the project.

Presentations: Various presentations made during the project meetings are listed below. The project was also presented on two international forums in Denmark and Italy. The project Leader, Per Fahlén, also presented a paper related to the project at a conference in Switzerland.

1. Javed, S., Fahlén, P., 2008. Overview of 2007 – Optimization of GCHP systems project. Göteborg, Sweden.
2. Javed, S., Fahlén, P., 2008. Lab Plans, Investigation Points and Partner’s Feedback. Göteborg, Sweden.
3. Javed, S., 2008. Optimization of GCHP systems. Venice, Italy.
4. Javed, S., 2008. Presentation of Optimization of GCHP systems Project. Copenhagen, Denmark.
5. Fahlén, P., 2008. Efficiency of Heat Pump Systems. 9th International IEA Heat Pump Conference, Zurich, Switzerland.

Kvartal 1, 2008

General: Two project meetings with partner companies were held during quarter 1. First meeting was held with CTC (ENERTECH) and the second meeting with Nibe. Close contact has been kept with Wilo regarding distributed pump systems and their control.

Various aspects of the project including but not limited to heat pump and borehole modelling were thoroughly discussed during both the meetings. Detailed discussion regarding the contributions of these companies and their expectations from the project were also held . The meetings were aimed to bring in perspective of the heat pump manufacturers in the project.
 
Field-meetings: The meeting at Nibe included a detailed trip to their ground coupled heat pump system installation. Data acquisition and modelling &simulation for the installation were discussed. A workshop on pump operation and design of heating and cooling systems was held at Nordbygg in cooperation between Wilo and Chalmers (this activity was shared with another Chalmers project on the efficiency of pump and fan operation).
 
Lab-meetings: None in this quarter.
 
Presentations: None in this quarter.

Academics: During quarter 1, the PhD researcher was involved in 3 academic courses in addition to the research work.

Kvartal 4, 2007

General: Two project meetings were held during quarter 4. First meeting held on 2007-10-10 focused on works plans for the future. A review of available simulation programs was presented and feedback was invited from the participating companies. Detailed meetings with individual companies were planned based on the discussion. A presentation regarding state-of-art literature review was also made. Most of the participating companies actively participated in the meeting and provided detailed feedback on mathematical models and simulation programs used by them.
 
The second meeting was held at Karlstad. The motive behind the meeting was to study recently commissioned ground-coupled heat pump system at Akademiska Hus from modeling and simulation perspective. Participating companies showed a tremendous interest by participating enthusiastically and discussing actively various issues regarding the project.
 
Another meeting that took place during quarter 4 was with a participating company ÅF-Infrastruktur. During the meeting, held on 2007-12-17, various perspectives of simulation software IDA were presented by Jörgen Eriksson. Comparisons were also made among different simulation options.
 
Simulation: Detailed discussions regarding selection of an appropriate simulation environment were held. Different options were recommended and it was decided that they would be looked into.
 
Field-meetings: A detailed meeting was held at Karlstad and detailed discussions regarding data acquisition and modeling and simulation for the installation were held.
 
Lab-meetings: None.
 
Presentations: The project was presented on various forums both in-house and externally. Noteworthy presentations during the 4th quarter included presentations made at Kyltekniska Föreningen at Göteborg[2] and EffsysII dagen at Eskilstuna[9].
 
Presentations made till date in reference to the project are:
 
1.Fahlén, P., 2007. Optimization of ground storage heat pump systems for space conditioning of buildings. Göteborg.
 
2.Fahlén, P., 2007. Värmepump, frikyla och borrhålslager. (Kyltekniska föreningens avdelningsmöte, 2007-10-22.) Göteborg.
 
3.Hellström, G., Claesson, J., 2007. Conditions for using the ground as source, sink and storage. Göteborg.
 
4.Javed, S., Fahlén, P., 2007. GCHP system: State of the Art Literature Review. Göteborg.
 
5.Javed, S., Fahlén, P., 2007. GCHP system: Review of Simulation Software. Göteborg.
 
6.Javed, S., Fahlén, P., 2007. Work plans for the Project: Optimization of GCHP systems. Göteborg.
 
7.Javed, S., Fahlén, P., 2007. Optimization of ground-coupled heat pump systems. (1:a Effsys II dagen, 2007-11-08, Statens Energimyndighet.) Eskilstuna, Sweden.
 
8.Naumov, J., 2005. Optimization of ground-coupled systems for heating and cooling of buildings. (D2005:04, 82 sidor, Chalmers University of Technology, Building Services Engineering.) Göteborg.
 
9.Zhou, Y., Fahlén, P., Lindholm, T., 2006. Performance and optimum for a ground-coupled liquid loop heat recovery ventilation system. (2006 International Refrigeration and Air-Conditioning Conference, 2006-07-17--19.) Purdue University, USA.
 

Kvartal 3, 2007

Optimering av marklageranslutna värmepumpsystem för klimatisering av byggnader
Allmänt: Kvartal 3 omfattar en period med mycket semestrar men ett kommande projektmöte har planerats och arbetet fortsätter med framtagning av en detaljerad arbetsplan och sammanställning av ett par arbetsrapporter. Dessa kommer att behandla:

- Översikt av kunskapsläget beträffande marklagersystem (litteraturöversikt med kommentarer)
- Översikt över beräkningsprogram och modelleringsansatser

Simulering: Huvudspåret för närvarande är att arbeta i MatlabSimulink. Diskussioner förs fortlöpande med deltagande företag och ett möte är planerat i slutet av året för att diskutera de modeller som utvecklats i IDA. Kontakt har etablerats med Oklahoma State University beträffande modellering av lager och värmepumpssystem.

Fältmätningar: Lämpliga objekt diskuteras med Akademiska hus och övriga deltagare. Vid ett projektmöte framkom ett flertal intressanta objekt. Samverkan med KTH planeras i fältmätningsprojekten.

Labmätningar: En infrastruktur för att kunna emulera valfria lastprofiler av byggnadsrelaterade kyl- och värmebehov projekteras i Installationstekniks försökshall. Uppbyggnaden sker med hjälp av naturabidrag från medverkande före-tag. Diskussioner har påbörjats om utformningen av samverkan med Donghua University i Shanghai (bl.a. fördelning av forskningsuppgifter och sammanställning av befintliga resurser).

Presentation: Ett antal presentationer gjordes i samband med projektets uppstartsmöte 2007-05-16[1].Kommande presentationer planeras till ett möte hos Kyltekniska Föreningen i Göteborg 2007-10-22 samt till den första EffsysII dagen i Eskilstuna 2007-11-08. Dessutom har en licentiatuppsats[3] och ett konferensbidrag[4] gjorts som underlag inför ansökan till detta projekt (publikationerna har inte haft finansiering från något annat projekt).

1. Fahlén, P., 2007. Optimization of groundstorage heat pump systems for space conditioning of buildings. Göteborg.

2. Fahlén, P., 2007. Värmepump, frikyla och borrhålslager. (Kyltekniska föreningens avdelningsmöte, 2007-10-22.) Göteborg.

3. Naumov, J., 2005. Optimization of ground-coupled systems for heating and cooling of buildings. (D2005:04, 82 sidor, Chalmers University of Technology, Building Services Engineering.) Göteborg.

4. Zhou, Y., Fahlén, P., Lindholm, T., 2006. Performance and optimum for a groundcoupled liquid loop heat recovery ventilation system. (2006 International Refrigeration and Air-Conditioning Conference, 2006-07-17--19.) Purdue University, USA.
 

EFFSYS2 dagen 2007-11-08 presentationsmaterial

Kvartal 1 och 2, 2007

Optimering av marklageranslutna värmepumpsystem för klimatisering av byggnader
Under vintern 2006/2007 utlystes tjänsten som doktorand i projektet och direktadresserade utskick gjordes till sista årskursens teknologer. Efter intervjuer under våren anställdes Saqib Javed från National University of Science and Technology i Rawalpindi, Pakistan (http://www.nust.edu.pk/usr/index.aspx). Saqib har en Master's examen från University of Sidney, Australien, och har arbetat flera år med projektering av luftkonditionering i Saudi Arabien för York International.

Parallellt med anställningsprocessen har diskussioner förts med ett antal av de medverkande företagen om möjliga insatser i projektet. Naturabidrag kommer inledningsvis i form av ett par värmepumpar, cirkulationspumpar m.m. Vi har också börjat sondera möjligheterna till borrning av några testhål i anslutning till Installationstekniks laboratorium.

Efter Saqibs anställning 2007-04-01 har en doktorandplan utarbetats och Saqib har börjat insamling av referenser. Innehållsförteckningen till en state-of-the-art rapport har tagits fram och Saqib har även börjat kontakta intressanta forskare i omvärlden. Dessutom arbetar Saqib med att identifiera och få del av befintliga programvaror för delsystem och speciellt beträffande borrhålssystem. Programmet EED (Earth Energy Designer) har vi använt tidigare och det kommer användas för en initial jämförelse mellan noggrann numerisk beräkning och föreklade analytiska modeller av borrhålssystemet.

Uppstartsmöte hölls på Chalmers 2007-05-16 med 11 deltagare. Bl.a. diskuterades företagens förväntningar på projektet och hur de aktivt kan bidra för att föra arbetet framåt. Från Chalmers och LTH hölls föredragningar om förutsättningarna för optimering av den här typen av system.