Wyniki wyszukiwania - Biblioteka Nauki

1

Low temperature district heating using waste heat from biogas plant

100%

Cenian A. , Noch T.

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tom T. 2

19--28

EN

A biogas plant can be a source of waste-heat flows with different thermal parameters. Application of such flows in local, low-temperature district-heating networks is a very attractive option for highly efficient, energetically and economically, co-generation systems applying biogas as the primary energy source.

2

Hydrotermalna liza pofermentu i jej skutki

80%

Cenian A. , Zimiński T. , Dach J. , Lewicki A.

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tom Nr 6

14--15

3

Barwnikowe ogniwa słoneczne z przeciwelektrodą grafenową

80%

Klein M. , Siuzdak K. , Cenian A.

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tom nr 1-4

5--9

PL

W niniejszej pracy przedstawiono technologię barwnikowych ogniw słonecznych wykorzystujących jako przeciwelektrodę (katodę) warstwę nanopłatków grafenowych wytworzoną metodą pokrywania natryskowego. Mimo gorszych wartości parametrów ogniwa z warstwą węglową w porównaniu do ogniwa z warstwą Pt, konkurencyjna cena grafenu w stosunku do platyny oraz możliwość poprawy wydajności ogniwa poprzez kontrolę parametrów wytwarzania warstw otwiera szerokie perspektywy dla zastąpienia metalu szlachetnego - materiałem węglowym.

4

Monosubstrate fermentation of chicken manure after pretreatment using cold and hot water extraction

80%

Konkol I. , Sołowski G. , Cenian A.

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tom T. 2

79--84

EN

Simple pretreatmentof raw chicken manureby cold and hot water extractionincreased the crucial for fermentation C:N ratio 2 to 2.7-fold. The pretreated chicken manure thus became suitable for methane fermentation as monosubstrate, this is due to higher C:N ratio. Cumulative methane and biogas production after pretreatment increasedabout 18–40% and 16–45%, respectively.

5

New results from microalgae production and techniques

61%

Grossmann J. , Matthes S. , Karwacki J. , Kwidziński R. , Tomaszewski A. , Lackowski M. , Cenian A.

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tom T. 2

47--62

EN

The paper deals with new technical solutions for outdoor cultivation systems for microalgae production. Various types of algae cultivation systems and materials applied for reactors are described. The characteristics and performance of a novel closed photobioreactor system with “Christmas tree” design (brand name: GICON-PBR) consisting of a silicone double-wall tubing-system, developed in collaboration between the companies GICON and Wacker Chemical corporation, are discussed. Special attention is paid to the issue of temperature control for closed cultivation systems. The performance of the chilling system stabilizing the temperature of algae cultivation, which applies a thermal energy storage filled with Phase Change Material (PCM). Two kinds of the systems are considered: free cooling and with compressor units. The lumped-model equations were developed to analyze heat-transfer dynamics inside the installation and some results are presented here. The model equations describe energy balances for the chiller, PCM thermal storage and heat receiver. Influence of the heat transfer, fluid-flow-rate control, heat capacity of the system components as well as heat losses to ambient were taken into account. The results of PCM storage application are compared with reference water-filled buffer-tank. The study shows a great potential of PCM storage unit to stabilize the temperature of the algae cultivation system.

6

Tests and theoretical analysis of a PVT hybrid collector operating under various insolation conditions

61%

Sawicka-Chudy P. , Sibiński M. , Cholewa M. , Klein M. , Znajdek K. , Cenian A.

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tom no. 26

62--74

EN

The main goal of the study was to investigate the relationship between the orientation of the PVT (PhotoVoltaic Thermal) collector and the thermal and electric power generated. Extensive research was performed to find optimal tilt angles for hybrid solar thermal collectors, which combine photovoltaic as well as thermal collection in a single unit, known as PVT (PhotoVoltaic Thermal) modules for an office building with working hours between 7.00 and 16.00. The comprehensive study included field measurements of the modules in central Poland and tests under AM (air mass) 1.5 conditions in a certified laboratory KEZO (Centre for Energy Conversion and Renewable Resources) Polish Academy of Sciences in Jablonna. Furthermore, a PVT system was investigated using the simulation method based on the dedicated Polysun software. The PV characteristics and efficiency of the PV module and the relation between power or efficiency of the PVT module and incidence angle of solar-irradiance were studied. Optimal work conditions for commercial PVT modules were ascertained. In addition, it was found that the maximum efficiencies of PV module (ηPV), solar thermal-collector (ηc) and PVT hybrid collector (ηPVT) registered under field conditions were higher than the ones measured under laboratory conditions.