Publication detail

Applicability of Tri-generation Energy Production for Air-conditioning Systems in Czech Republic

POSPÍŠIL, J. FIEDLER, J.

Original Title

Applicability of Tri-generation Energy Production for Air-conditioning Systems in Czech Republic

English Title

Applicability of Tri-generation Energy Production for Air-conditioning Systems in Czech Republic

Type

conference paper

Language

en

Original Abstract

The Czech Republic legislation encourages utilizing of all kinds of poly-generation systems. Local distributors of electricity must buy at a special price all electricity produced by poly-generation systems. Year operation hours of poly-generation systems are limited only by actual heat requirements. The cogeneration unit used in the studied building runs 6350 hour per year without utilizing of an absorption cycle. This period is extended to 7250 hour per year in a case of utilizing of the tri-generation technology driven by heat from a cogeneration unit. This extension enables to operate the cogeneration unit effectively even during summer period, commonly without heat requirements. Poly-generation of energy is connected with saving of a primary energy sources. The cogeneration technology decreases consumption of the primary energy by 29 %. The tri-generation technology decreases consumption of the primary energy by 20 %. We calculated the payback period as a basic economical criterion. Input parameters correspond to situation in the Czech Republic in the year 2006. The payback of the cogeneration and the tri-generation technology was evaluated close to 4.5 years in comparison with the separate production of electricity, heat and cool. An investment of a tri-generation technology is more expensive in comparison with a cogeneration technology. But a tri-generation technology offers higher annual saving and higher profit during the life-time period. In this contribution we assumed not utilizing of waste heat from the tri-generation technology. This low temperature heat can be utilized for preheating of water or heating of swimming pools. In these cases the saving of the primary energy is more significant. A tri-generation technology connected with an air-condition unit is profitable assembly convenient for mid-size building in conditions of the Czech Republic. Other advantages of this system are: uniform annual consumption of electricity, air-conditioning without burden of an electricity distribution net, back up source of energy.

English abstract

The Czech Republic legislation encourages utilizing of all kinds of poly-generation systems. Local distributors of electricity must buy at a special price all electricity produced by poly-generation systems. Year operation hours of poly-generation systems are limited only by actual heat requirements. The cogeneration unit used in the studied building runs 6350 hour per year without utilizing of an absorption cycle. This period is extended to 7250 hour per year in a case of utilizing of the tri-generation technology driven by heat from a cogeneration unit. This extension enables to operate the cogeneration unit effectively even during summer period, commonly without heat requirements. Poly-generation of energy is connected with saving of a primary energy sources. The cogeneration technology decreases consumption of the primary energy by 29 %. The tri-generation technology decreases consumption of the primary energy by 20 %. We calculated the payback period as a basic economical criterion. Input parameters correspond to situation in the Czech Republic in the year 2006. The payback of the cogeneration and the tri-generation technology was evaluated close to 4.5 years in comparison with the separate production of electricity, heat and cool. An investment of a tri-generation technology is more expensive in comparison with a cogeneration technology. But a tri-generation technology offers higher annual saving and higher profit during the life-time period. In this contribution we assumed not utilizing of waste heat from the tri-generation technology. This low temperature heat can be utilized for preheating of water or heating of swimming pools. In these cases the saving of the primary energy is more significant. A tri-generation technology connected with an air-condition unit is profitable assembly convenient for mid-size building in conditions of the Czech Republic. Other advantages of this system are: uniform annual consumption of electricity, air-conditioning without burden of an electricity distribution net, back up source of energy.

Keywords

poly-generation, tri-generation, heating, cooling, absorption cycle, cogeneration

RIV year

2007

Released

25.08.2007

Publisher

WSEAS Press

Location

Athens, GR

ISBN

978-960-6766-02-2

Book

Proceedings of the Heat Transfer, Thermal Engineering and Environment 2007

Edition

1

Edition number

1

Pages from

198

Pages to

203

Pages count

6

BibTex


@inproceedings{BUT25569,
  author="Jiří {Pospíšil} and Jan {Fiedler}",
  title="Applicability of Tri-generation Energy Production for Air-conditioning Systems in Czech Republic",
  annote="The Czech Republic legislation encourages utilizing of all kinds of poly-generation systems. Local distributors of electricity must buy at a special price all electricity produced by poly-generation systems. Year operation hours of poly-generation systems are limited only by actual heat requirements. 
     The cogeneration unit used in the studied building runs 6350 hour per year without utilizing of an absorption cycle. This period is extended to 7250 hour per year in a case of utilizing of the tri-generation technology driven by heat from a cogeneration unit. This extension enables to operate the cogeneration unit effectively even during summer period, commonly without heat requirements.      
     Poly-generation of energy is connected with saving of a primary energy sources. The cogeneration technology decreases consumption of the primary energy by 29 %. The tri-generation technology decreases consumption of the primary energy by 20 %.  We calculated the payback period as a basic economical criterion. Input parameters correspond to situation in the Czech Republic in the year 2006. The payback of the cogeneration and the tri-generation technology was evaluated close to 4.5 years in comparison with the separate production of electricity, heat and cool. An investment of a tri-generation technology is more expensive in comparison with a cogeneration technology. But a tri-generation technology offers higher annual saving and higher profit during the life-time period.
     In this contribution we assumed not utilizing of waste heat from the tri-generation technology. This low temperature heat can be utilized for preheating of water or heating of swimming pools. In these cases the saving of the primary energy is more significant. 
     A tri-generation technology connected with an air-condition unit is profitable assembly convenient for mid-size building in conditions of the Czech Republic. Other advantages of this system are: uniform annual consumption of electricity, air-conditioning without burden of an electricity distribution net, back up source of energy.
",
  address="WSEAS Press",
  booktitle="Proceedings of the Heat Transfer, Thermal Engineering and Environment 2007",
  chapter="25569",
  edition="1",
  institution="WSEAS Press",
  year="2007",
  month="august",
  pages="198--203",
  publisher="WSEAS Press",
  type="conference paper"
}