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Jomni, Yassin
Publications (10 of 12) Show all publications
Jomni, Y. (2007). Activity: IDEA Annual Conference & Trade Show, Setting the Pace, Leading the Way (ed.). Paper presented at IDEA Annual Conference & Trade Show : Setting the Pace, Leading the Way 17/06/2007 - 20/06/2007. Paper presented at IDEA Annual Conference & Trade Show : Setting the Pace, Leading the Way 17/06/2007 - 20/06/2007.
Open this publication in new window or tab >>Activity: IDEA Annual Conference & Trade Show, Setting the Pace, Leading the Way
2007 (English)Conference paper, Published paper (Other (popular science, discussion, etc.))
Identifiers
urn:nbn:se:ltu:diva-41536 (URN)6be5645a-4264-4eb2-b7d5-94a3ceee012c (Local ID)6be5645a-4264-4eb2-b7d5-94a3ceee012c (Archive number)6be5645a-4264-4eb2-b7d5-94a3ceee012c (OAI)
Conference
IDEA Annual Conference & Trade Show : Setting the Pace, Leading the Way 17/06/2007 - 20/06/2007
Note
Startdatum: 17/06/2007; Slutdatum: 20/06/2007; Roll: Talare; Typ: Föreläsning / muntligt bidragAvailable from: 2016-10-03 Created: 2016-10-03 Last updated: 2017-11-24Bibliographically approved
Delsing, J., van Deventer, J., Yliniemi, K., Gustafsson, J. & Jomni, Y. (2007). Projekt: Fjärrvärme. Paper presented at .
Open this publication in new window or tab >>Projekt: Fjärrvärme
Show others...
2007 (Swedish)Other (Other (popular science, discussion, etc.))
Keywords
fjärrvärme
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Industrial Electronics
Identifiers
urn:nbn:se:ltu:diva-36256 (URN)cb98f189-c174-4259-a57e-852e878fe9f5 (Local ID)cb98f189-c174-4259-a57e-852e878fe9f5 (Archive number)cb98f189-c174-4259-a57e-852e878fe9f5 (OAI)
Note

Forskningsprogram: Svensk Fjärrvärme; Internetadress: http://www.svenskfjarrvarme.se/; Publikationer; Integration of an IP based low-power sensor network in district heating substations; Sensor fault detection in a district heating substation; Heat metering - not just for invoicing; Fault detection in district heating substations; Improving heat measurement accuracy in district heating substations; Improving heat measurement accuracy in district heating substations; Application of ultrasonic clamp-on flow meters for in situ tests of billing meters in district heating systems; Model of a heat meter in a district heating substation under dynamic load; Comparison measurement of flow between ultrasonic clamp-on flow meters and billing meters in district heating substation; Detection of pulsating flows in an ultrasonic flow meter; Improved district heating substation efficiency with a new control strategy; Independence and interdependence of systems in district heating; Wireless sensor network architectures as a foundation for efficient district heating; Controlling district heating load through prices; Aktiviteter: Euroheat & Power R&D Workshop: High Efficiency - Improved Building Installations and Customer Comfort; International Conference on Advanced Mathematical and Computational Tools in Metrology, AMCTM 2005; Status: Pågående; Period: 01/11/2006 → 31/12/2008

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved
Jomni, Y. (2006). Activity: Euroheat & Power R&D Workshop: High Efficiency - Improved Building Installations and Customer Comfort (ed.). Paper presented at Euroheat & Power R&D Workshop: High Efficiency - Improved Building Installations and Customer Comfort : 02/02/2006 - 03/02/2006. Paper presented at Euroheat & Power R&D Workshop: High Efficiency - Improved Building Installations and Customer Comfort : 02/02/2006 - 03/02/2006.
Open this publication in new window or tab >>Activity: Euroheat & Power R&D Workshop: High Efficiency - Improved Building Installations and Customer Comfort
2006 (English)Conference paper, Published paper (Other (popular science, discussion, etc.))
Identifiers
urn:nbn:se:ltu:diva-41665 (URN)a5c95895-b689-47fa-bc0b-51becdac1e22 (Local ID)a5c95895-b689-47fa-bc0b-51becdac1e22 (Archive number)a5c95895-b689-47fa-bc0b-51becdac1e22 (OAI)
Conference
Euroheat & Power R&D Workshop: High Efficiency - Improved Building Installations and Customer Comfort : 02/02/2006 - 03/02/2006
Note
Startdatum: 02/02/2006; Slutdatum: 03/02/2006; Roll: Talare; Typ: Föreläsning / muntligt bidragAvailable from: 2016-10-03 Created: 2016-10-03 Last updated: 2017-11-24Bibliographically approved
Jomni, Y. & van Deventer, J. (2006). Comparing heat measurement accuracy of a new adaptive algorithm with existing heat meters in accordance to the Swedish test standards (ed.). In: (Ed.), Proceedings, 10th International Symposium on District Heating and Cooling: . Paper presented at International Symposium on District Heating and Cooling : 03/09/2006 - 05/09/2006.
Open this publication in new window or tab >>Comparing heat measurement accuracy of a new adaptive algorithm with existing heat meters in accordance to the Swedish test standards
2006 (English)In: Proceedings, 10th International Symposium on District Heating and Cooling, 2006Conference paper, Published paper (Refereed)
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Industrial Electronics
Identifiers
urn:nbn:se:ltu:diva-32745 (URN)75434810-e90a-11db-b9a9-000ea68e967b (Local ID)75434810-e90a-11db-b9a9-000ea68e967b (Archive number)75434810-e90a-11db-b9a9-000ea68e967b (OAI)
Conference
International Symposium on District Heating and Cooling : 03/09/2006 - 05/09/2006
Note

Godkänd; 2006; 20070328 (pekkari)

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved
Delsing, J., Jomni, Y., Yliniemi, K. & van Deventer, J. (2006). Heat metering - not just for invoicing (ed.). In: (Ed.), : . Paper presented at Fjärrvärmedagarna : 04/06/2006 - 05/06/2006.
Open this publication in new window or tab >>Heat metering - not just for invoicing
2006 (English)Conference paper, Oral presentation only (Other academic)
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Industrial Electronics
Identifiers
urn:nbn:se:ltu:diva-31768 (URN)60a1c550-dd23-11db-9cae-000ea68e967b (Local ID)60a1c550-dd23-11db-9cae-000ea68e967b (Archive number)60a1c550-dd23-11db-9cae-000ea68e967b (OAI)
Conference
Fjärrvärmedagarna : 04/06/2006 - 05/06/2006
Projects
Fjärrvärme
Note

Godkänd; 2006; 20070328 (pekkari)

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved
Jomni, Y. (2006). Improving heat measurement accuracy in district heating substations (ed.). (Doctoral dissertation). Paper presented at . Luleå: Luleå tekniska universitet
Open this publication in new window or tab >>Improving heat measurement accuracy in district heating substations
2006 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The idea of district heating is to heat up a whole district from a central source through a distribution network. The heat is extracted by heat exchangers and the water is then subsequently returned to the central source. The heat exchange between the district heating network and the building occurs in district heating substations. Heat meters are located in such substations and are divided into two main categories depending on their heat energy estimation frequency modes. Which are either constant or flow rate dependent. The Swedish district heating industry is a business with revenue of approximately 19.8 billion SEK (as of the year 2002). Considering an error of 1% in energy delivered, that is a loss of 198 million SEK, which justifies the current research. The accuracy in heat measurement for billing purposes is then one of the major reasons for conducting this research. Few studies have been done in this area. A Swedish study shows that the major causes of the errors are: flow meters, temperature sensors, integrating units, lightning, control systems, valves, leaks in heat exchangers and the dynamic heat demand imposed on the district heating substation. I have chosen to study the heat measurement errors due to dynamic load imposed on the district heating substation because they are the least investigated and presumably account for a substantial portion of the total error. I have delimited my research area to include single family houses, since the effects of dynamic heat load on heat metering are more important in this kind of dwelling. A major tool in the investigation has been simulations based on a Simulink model, of a district heating substation and a house. For this purpose, the simulation model has been extended to handle new heat measurement strategies. A district heating laboratory was built at Luleå University of Technology to test not only the accuracy of different heat measurement algorithms but also control and diagnosis methods. Based on analysis of the measurement strategies, an adaptive algorithm and a feed-forward method are proposed in this thesis to reduce the heat measurement errors due to the dynamic heat demand imposed on the substation. Simulations conducted show that the adaptive algorithm has a higher measurement accuracy than both kinds of existing heat meters. The feed-forward method has the highest measurement accuracy compared to both kinds of existing heat meters and the adaptive algorithm.

Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2006. p. 127
Series
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544 ; 2006:54
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Industrial Electronics
Identifiers
urn:nbn:se:ltu:diva-26509 (URN)e95a5420-d6d9-11db-8550-000ea68e967b (Local ID)e95a5420-d6d9-11db-8550-000ea68e967b (Archive number)e95a5420-d6d9-11db-8550-000ea68e967b (OAI)
Projects
Fjärrvärme
Note

Godkänd; 2006; 20061116 (pafi)

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-02-27Bibliographically approved
Jomni, Y., Yliniemi, K., Delsing, J. & van Deventer, J. (2006). Testing a new feed forward method against the Swedish standard and comparison with existing heat meters. In: (Ed.), Improving Heat Measurment Accuracy in District Heating Substations: (pp. 117-125). Paper presented at . Luleå: Luleå tekniska universitet
Open this publication in new window or tab >>Testing a new feed forward method against the Swedish standard and comparison with existing heat meters
2006 (English)In: Improving Heat Measurment Accuracy in District Heating Substations, Luleå: Luleå tekniska universitet, 2006, p. 117-125Chapter in book (Other academic)
Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2006
Series
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544 ; 2006:54
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Industrial Electronics
Identifiers
urn:nbn:se:ltu:diva-20644 (URN)6bf62a10-3d47-11dd-ab50-000ea68e967b (Local ID)6bf62a10-3d47-11dd-ab50-000ea68e967b (Archive number)6bf62a10-3d47-11dd-ab50-000ea68e967b (OAI)
Note

Godkänd; 2006; 20080618 (kimmo)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved
Jomni, Y., Yliniemi, K., van Deventer, J. & Delsing, J. (2005). Architecture for internet enabled measurements in a district heating substation laboratory (ed.). In: (Ed.), Proceeding AMCTM 2005: . Paper presented at International Conference on Advanced Mathematical and Computational Tools in Metrology : 27/06/2005 - 29/06/2005.
Open this publication in new window or tab >>Architecture for internet enabled measurements in a district heating substation laboratory
2005 (English)In: Proceeding AMCTM 2005, 2005Conference paper, Published paper (Refereed)
Abstract [en]

An architecture for the energy measurement and control and monitoring at a district heating substation is propsoed. A district heating substation is comprised of a set of sensors and actuators crutial for the well being of the substation. We want to make the data from the sensors available over the internet and provide access to the control system of the district heating substation over the internet. This technology will be implemented in a district heating laboratory being constructed at Lulea ̊ University of Technology.The architecture is based on wireless sensor and actuator nodes each talking the TCP/IP Internet suite of protocols. The implementation is made with the wireless Embedded Internet System plattform MULLE that supports the TCP/IP suite of protocols. The basic architecture and means for its implementation is given. Other applications where this vision can be readily applied are for example, sports and metrology.

National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Industrial Electronics
Identifiers
urn:nbn:se:ltu:diva-26987 (URN)046a7db3-f59e-4682-a154-4d31202be397 (Local ID)046a7db3-f59e-4682-a154-4d31202be397 (Archive number)046a7db3-f59e-4682-a154-4d31202be397 (OAI)
Conference
International Conference on Advanced Mathematical and Computational Tools in Metrology : 27/06/2005 - 29/06/2005
Note

Godkänd; 2005; 20130323 (jerker)

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved
Jomni, Y., van Deventer, J. & Delsing, J. (2004). Improving heat energy measurement in district heating substations using an adaptive algorithm (ed.). In: (Ed.), Proceedings of the 12th International Conference on Flow Measurement: Flomeko'04. Paper presented at International Conference on Flow Measurement : 14/09/2004 - 17/09/2004 (pp. 554-558).
Open this publication in new window or tab >>Improving heat energy measurement in district heating substations using an adaptive algorithm
2004 (English)In: Proceedings of the 12th International Conference on Flow Measurement: Flomeko'04, 2004, p. 554-558Conference paper, Published paper (Refereed)
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Industrial Electronics
Identifiers
urn:nbn:se:ltu:diva-33118 (URN)7e86d7a0-675c-11db-8cbe-000ea68e967b (Local ID)7e86d7a0-675c-11db-8cbe-000ea68e967b (Archive number)7e86d7a0-675c-11db-8cbe-000ea68e967b (OAI)
Conference
International Conference on Flow Measurement : 14/09/2004 - 17/09/2004
Note

Godkänd; 2004; 20060925 (ysko)

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved
Jomni, Y., Yliniemi, K., van Deventer, J. & Delsing, J. (2004). Improving heat energy measurement using a feed-forward method for low power applications (ed.). In: (Ed.), : . Paper presented at International Symposium on District Heating and Cooling : 30/08/2004 - 31/08/2004.
Open this publication in new window or tab >>Improving heat energy measurement using a feed-forward method for low power applications
2004 (English)Conference paper, Oral presentation only (Refereed)
Abstract [en]

Heat measurement errors cause large revenue discrepancies in the district heating industry. Some of these errors are static and can be estimated using standard error analysis, but the largest error cause is the dynamic load such systems are subject to, as in the case of warm water tapping. The frequency at which heat meters estimate and update the energy is either constant or depends on the flow rate. They are often battery operated and their power consumption is proportional to their estimation frequency. Heat meters with a flow rate dependent estimation frequency are usually based on volume-flow meters. They are widely used in district heating due to their lower estimation frequency, which prolongs their battery life. Such devices are inaccurate especially at low flow rates. A Feed-forward method that measures the heat energy only when changes occur is presented in this paper.This method reduces the heat measurement error due to the dynamics of the system while minimizing the battery power consumption. The Feed-Forward method has been implemented and tested at cross-purposes with flow rate dependent heat meters in a Simulink model of a district heating substation.

National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Industrial Electronics
Identifiers
urn:nbn:se:ltu:diva-29645 (URN)32f927d0-514e-11db-9592-000ea68e967b (Local ID)32f927d0-514e-11db-9592-000ea68e967b (Archive number)32f927d0-514e-11db-9592-000ea68e967b (OAI)
Conference
International Symposium on District Heating and Cooling : 30/08/2004 - 31/08/2004
Note

Godkänd; 2004; Bibliografisk uppgift: Sider: 243-249; 20060929 (ysko)

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved

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