E-ISBN 978-9984-861-17-3

table of Contents

  

Growing and processing technologies of energy crops
 		  
Fibre crops for energy production and energy saving
Winfried Schäfer		 7
Industrial hemp – a promising source for biomass production
Zofija Jankauskienė, Elvyra Gruzdevienė		 13
Evaluation of reed resources in Kurzeme region in Latvia
Edgars Čubars, Gotfrīds Noviks		 19
The evaluation of dry mass yield of new energy crops and their energetic parameters
Gintaras Šiaudinis, Alvyra Šlepetienė , Danutė Karčauskienė		 24
Inoculation as an element of energy saving in the cultivation technology of grain legumes under conditions
of the forest-steppe of Ukraine
Serhiy Kolisnyk, Svitlana Kobak		 29
Cereal grain as alternative fuel in Latvia
Inga Jansone, Zinta Gaile		 33
Oilseed rape (Brassica napus ssp. oleifera) seed yield depending on several agro-ecological factors
Oskars Balodis, Zinta Gaile		 39
Comparison of different energy crops for solid fuel production in Latvia
Ļubova Komlajeva, Aleksandrs Adamovičs, Liena Poiša		 45
Maize production for biogas in Latvia
Janis Bartusevics, Zinta Gaile		 51
The estimation of energy efficiency of crop rotation in long–term trials
Janis Vigovskis, Daina Sarkanbarde, Agrita Svarta, Aivars Jermuss, Ludmila Agafonova		 57
Reed canary grass (Phalaris arundinacea L.) in natural biocenosis of Latvia, research experiments and
production fields
Biruta Jansone, Sarmite Rancane, Peteris Berzins, Vija Stesele		 61
Biomass potential of plants grown for bioenergy production
Jonas Slepetys, Zydre Kadziuliene, Lina Sarunaite, Vita Tilvikiene, Aldona Kryzeviciene		 66
Oil-flax variety ‘Scorpion’ suitability of assessment for biofuels production
Liena Poiša, Aleksandrs Adamovičs		 73
Energy-saving technology of maize grain conservation in big-bags
Oleksandr Kurnaev		 79
Effect of soil tillage and herbicides on the grain maize yield under conditions of the forest-steppe zone of Ukraine
Vasyl Petrichenko, Viktor Zadorozhnyi, Olexandr Kornyichuk, Volodymyr Borona		 80

Biogas and biofuel production technologies
 
Policies and measures to promote sustainable bioenergy production and use in the Baltic Sea region
Michael Krug		 81
Bio-fuel from anaerobic co-digestion of the macro-algae Ulva lactuca and Laminaria digitata
Shiplu Sarker, Anette Bruhn, Alastair James Ward, Henrik Bjarne Møller		 86
Biomass as the main source of renewable energy in Poland
Wyszyński Zdzisław, Michalska-Klimczak Beata, Pągowski Krzysztof, Kamińska Sonia		 91
Small CHP plants in Latvia: reality and possibilities
Tatjana Odineca		 97
Specified evaluation of manure resources for production of biogas in planning region Latgale
Imants Plūme, Vilis Dubrovskis, Benita Plūme		 103
Analytical model and simulation of oxygen solubility in wastewater
Aigars Laizāns, Andris Šnīders		 109
Biogas production potential from agricultural biomass and organic residues in Latvia
Vilis Dubrovskis, Vladimirs Kotelenecs, Eduards Zabarovskis , Arvids Celms, Imants Plume		 115
Co-fermentation of biomass with high content of lignocelluloses for biogas producing
Vilis Dubrovskis, Vladimirs Kotelenecs, Arvīds Celms, Eduards Zabarovskis		 121
The Investigation of Biogas Potential in the Vidzeme Region
Indulis Straume		 127
The Investigation of Biogas Potential in the Pieriga Region
Indulis Straume		 133
GHG emissions from the usage of energy crops for biogas production
Imants Plūme, Vilis Dubrovskis, Benita Plūme		 139

Conditioning of the energy crop biomass compositions
 
Cutting properties of arranged stalk biomass
Andris Kronbergs, Eriks Kronbergs, Elgars Siraks, Janis Dalbins		 145
Preliminary data on the productivity of stump lifting head MCR-500
 Andis Lazdiņš, Agris Zimelis, Igors Gusarevs		 150
Preliminary results of estimation of forest biomass for energy potentials in final felling using a system analysis model
Andis Lazdiņš, Dagnija Lazdiņa, Gaidis Klāvs		 156
Heat of Combustion of Hemp and Briquettes Made of Hemp Shives
Jacek Kolodziej, Maria Wladyka - Przybylak, Jerzy Mankowski, Lidia Grabowska		 163
Regionally Specific Harvesting Residue Yield and Recovery Rates Used for Energy Policy Development
Arnis Jurevics, Dennis Hazel, Robert Abt, Mark Megalos, Ola Sallnas		  167
Influence of the particle parameters on the properties of biomass briquettes
Dainis Ancāns, Aivars Kaķītis, Imants Nulle		  173
Evaluation of biomass compacting mechanisms
Edgars Repsa, Eriks Kronbergs, Mareks Smits		 179

Solar energy applications and energy efficiency technologies in buildings
 
Water heating effectiveness of semi-spherical solar collector
Ilze Pelece, Imants Ziemelis		 185
The tracking system for solar collectors with reflectors
Liene Kancevica, Henriks Putans, Imants Ziemelis		 190
Criteria of effectiveness evaluation of variable speed centrifugal pumps in heating and cooling systems
Deniss Pilscikovs, Egils Dzelzitis		 196
Experimental investigation of heat carrier flow efficiency
Viktorija Zagorska, Henriks Putans, Imants Ziemelis		 201
Impact of indoor temperature on energy efficiency in office buildings
Galina Stankevica, Andris Kreslins		 207
Air heated solar collectors and their applicability
Aivars Aboltins, Guntis Rušķis, Janis Palabinskis		 212
Heat transfer in external walls made from autoclaved aerated concrete
Martins Vilnitis, Baiba Gaujena		 218
Evaluation of parameters of radiant heating systems
Jelena Psenicnaja		 224

Economic and legislative aspects of the renewable energy production
 
Policy of the European Union in the Field of Renewable Energy Resources in the Context of Common Power Industry Policy
Artis Broņka, Andra Zvirbule-Bērziņa		 225
Possibilities for renewable energy production on farms
Voldemārs Strīķis, Arnis Kalniņš, Arnis Lēnerts		 231
Development of institutional environment to promote the usage of renewable energy resources in Latvia
Jānis Leikučs		 235
Global and local challenges in the cultivation of food and energy crops
 Modrīte Pelše, Kaspars Naglis-Liepa		 242
Risk management in renewable energy production
Sandija Rivža, Pēteris Rivža		 249
Learning and innovation in networks: the case of biogas production in Latvia
Talis Tisenkopfs, Sandra Šūmane, Ilona Kunda		 255
Possibilities for biogas production development on the LLU Training and Research farm ,,Vecauce’’
Jolanta Klāviņa, Voldemārs Strīķis		 256