Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Marika Rošā is active.

Publication


Featured researches published by Marika Rošā.


Management of Environmental Quality: An International Journal | 2013

The consumer's role in energy efficiency promotion in Latvian manufacturing industry

Līga Ozoliņa; Marika Rošā

Purpose – The purpose of this paper is to recognize whether consumers on long time perspective have an influence on the increase of energy efficiency in manufacturing industries.Design/methodology/approach – Literature review, online survey, in‐depth interviews.Findings – Although the connection between consumer and energy efficiency promotion in manufacturing companies is currently weak, the growing trend to purchase “green” products may have an influence on companies’ decisions regarding energy efficiency issues. Furthermore, this would be necessary to take into account in development of new state energy efficiency policy instruments for industry.Practical implications – The results of this study can be taken into consideration in the development of new energy efficiency policy instruments for the industrial sector.Originality/value – The paper highlights the importance of consumers purchasing behavior and its possible influence on energy efficiency increase in manufacturing industry.


Latvian Journal of Physics and Technical Sciences | 2012

Thermal Performance Analysis of Solar Collectors Installed for Combisystem in the Apartment Building

Aivars Žandeckis; Lelde Timma; Dagnija Blumberga; Claudio Rochas; Marika Rošā

Thermal Performance Analysis of Solar Collectors Installed for Combisystem in the Apartment Building The paper focuses on the application of wood pellet and solar combisystem for space heating and hot water preparation at apartment buildings under the climate of Northern Europe. A pilot project has been implemented in the city of Sigulda (N 57° 09.410 E 024° 52.194), Latvia. The system was designed and optimised using TRNSYS - a dynamic simulation tool. The pilot project was continuously monitored. To the analysis the heat transfer fluid flow rate and the influence of the inlet temperature on the performance of solar collectors were subjected. The thermal performance of a solar collector loop was studied using a direct method. A multiple regression analysis was carried out using STATGRAPHICS Centurion 16.1.15 with the aim to identify the operational and weather parameters of the system which cause the strongest influence on the collectors performance. The parameters to be used for the systems optimisation have been evaluated. Daudzdzīvokļu Ēkai Uzstādītās Kombinētas Sistēmas Saules Kolektoru Veiktspējas Analīze Rakstā aplūkota saules un granulu kombinētā sistēma, kas Ziemeļeiropas klimatiskajos apstākļos nosedz daudzdzīvokļu ēkas apkures un karstā ūdens slodzes. Pilotprojekts tika īstenots Siguldā (N 57° 09.410 E 024° 52.194), Latvijā. Sistēma izveidota un optimizēta, izmantojot datorsimulācijas programmu TRNSYS. Rakstā īstenota sistēmas darbības analīze pēc iekārtu uzstādīšanas, organizējot nepārtrauktu monitoringu. Analizēta siltumnesēja plūsmas un temperatūras līmeņu ietekme uz saules kolektoru veiktspējas rādītājiem. Regresijas analīze veikta STATGRAPHICS Centurion 16.1.15 vidē, lai noteiktu, kuri no darbības un klimatiskajiem apstākļiem visvairāk ietekmē saules kolektoru efektivitāti. Izvērtēti nepieciešamie sistēmas optimizācijas parametri. Iegūts empīriskais modelis saules kolektoru efektivitātes noteikšanai.


Latvian Journal of Physics and Technical Sciences | 2008

Uncertainty Analysis of Primary Resource Savings at Cogeneration

Ivars Veidenbergs; Dagnija Blumberga; F. Romagnoli; E. Vīgants; Marika Rošā

Uncertainty Analysis of Primary Resource Savings at Cogeneration The article provides the uncertainty analysis for electricity and heat energy production measurements at a cogeneration plant. It is analysed how the uncertainty in the input data affects the uncertainty in the data on primary resource savings. In the work, the standard uncertainties have been estimated for both data sets. The uncertainty budget is defined for determination of the primary energy resource savings. Kogenerācijas Primāro Resursu Ietaupījumu Nenoteiktības Analīze Rakstā analizēti elektroenergijas un siltumenergijas ražošanas mērījumu nenoteiktības rādītāji kogenerācijas stacijā. Analizēta ievaddatu ietekme uz primāro resursu ietaupījumu lielumu nenoteiktību. Veikta primāro energoresursu standart-nenoteiktības un ieejas lielumu standartnenoteiktības izvērtēšana. Noteikts primāro energoresursu ietaupījumu nenoteiktības budžets.


Latvian Journal of Physics and Technical Sciences | 2008

Small-Scale Cogeneration Plant Data Processing and Analysis

Ivars Veidenbergs; Dagnija Blumberga; Claudio Rochas; F. Romagnoli; A. Blumberga; Marika Rošā

Small-Scale Cogeneration Plant Data Processing and Analysis In the article, the operational data on electricity and heat energy generation in a small-scale cogeneration plant are analysed. Different measurements done in the plant formed a basis for estimation and evaluation of the savings of primary energy in comparison with distributed energy production. The authors analyse the efficiency values for the heat and the electricity production in the cogeneration regime and the savings of primary energy when the cogeneration plant works with partial load. Mazas Jaudas Kogenerācijas Stacijas Darbināšanas Datu Apstrāde Un Analīze Rakstā analizēti elektroenergijas un siltumenergijas ražošanas inženiertehniskie darbības rādītāji mazas jaudas kogenerācijas stacijā. Veikti mērījumi kogenerācijas stacijā, uz kuriem balstoties veikta primārās energijas ietaupījumu noteikšana un vērtēšana, salīdzinot ar dalītas energijas izstrādi. Analizētas elektroenergijas un siltumenergijas ražošanas lietderības koeficientu vērtības kogenerācijas režīmā. Veikta primāro energoresursu ietaupījumu analīze, kogenerācijas stacijai darbojoties ar daļēju noslodzi.


Applied Energy | 2013

Solar and pellet combisystem for apartment buildings: Heat losses and efficiency improvements of the pellet boiler

Aivars Žandeckis; Lelde Timma; Dagnija Blumberga; Claudio Rochas; Marika Rošā


Energy | 2011

How to select appropriate measures for reductions in negative environmental impact? Testing a screening method on a regional energy system

Ilze Dzene; Marika Rošā; Dagnija Blumberga


international conference on energy environment | 2013

Forecasting Electricity Consumption based on Smart Metering Case Study in Latvia

Ilze Laicāne; Andra Blumberga; Marika Rošā; Dagnija Blumberga; Uldis Bariss


publication.editionName | 2014

A Decision Support Method for Development of Industrial Synergies: Case Studies of Latvian Brewery and Wood-Processing Industries

Marika Rošā; Anna Kubule


27th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy System (ECOS2014) | 2014

Modelling of Electricity Accumulation from Irregular Renewable Energy Resources

Toms Zoss; Marika Rošā; Francesco Romagnoli; Jūlija Gušča; Dagnija Blumberga


Archive | 2016

State of the art on historic building insulation materials and retrofit strategies

Andra Blumberga; Kristaps Kašs; Edite Kamendere; Gatis Žogla; Agris Kamenders; Dagnija Blumberga; Armands Grāvelsiņš; Reinis Purviņš; Marika Rošā; Lelde Timma; Hans Janssen; Peggy Freudenberg; Fredrik Ståhl; Ruut Hannele Peuhkuri; Pierryves Padey; Sebastien Lasvaux; Elisa di Giuseppe; Ernst Jan de Place Hansen

Collaboration


Dive into the Marika Rošā's collaboration.

Top Co-Authors

Avatar
Top Co-Authors

Avatar

Andra Blumberga

Riga Technical University

View shared research outputs
Top Co-Authors

Avatar

Claudio Rochas

Riga Technical University

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar

Aiga Barisa

Riga Technical University

View shared research outputs
Top Co-Authors

Avatar

Anna Kubule

Riga Technical University

View shared research outputs
Top Co-Authors

Avatar

Lelde Timma

Riga Technical University

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar

Ilze Dzene

Riga Technical University

View shared research outputs
Top Co-Authors

Avatar

Ilze Laicāne

Riga Technical University

View shared research outputs
Researchain Logo
Decentralizing Knowledge