Primary energy factor of a district cooling system

Duh Čož, Tjaša (avtor), Kitanovski, Andrej (avtor), Poredoš, Alojz (avtor)

The primary energy efficiency for various energy-related processes can be calculated using the primary energy factor (PEF). In this paper, the PEFs of district cooling systems (PEF DC) for different types of cold production are derived. These concern cold production with an absorption chiller driven by different available sources and cold production with a compressor chiller driven by different types of engines and related energy sources. Based on the fundamental definition of the PEF, a mathematical model for calculating the PEF DC for different types of cold production was developed. The results in this study reveal that the PEF DC can be significantly improved in the case of combined cooling and power generation. The PEF DC in the case of combined cooling and power generation is lower than when cooling with electrically driven compressor chillers when the energy efficiency of the electricity generation in thermal power plant is low or the PEF of the electricity (PEF el) is high. In cold production technologies where coal is used as the primary energy source more primary energy is consumed compared to other primary energy sources (i.e. naturaThe primary energy efficiency for various energy-related processes can be calculated using the primary energy factor (PEF). In this paper, the PEFs of district cooling systems (PEF DC) for different types of cold production are derived. These concern cold production with an absorption chiller driven by different available sources and cold production with a compressor chiller driven by different types of engines and related energy sources. Based on the fundamental definition of the PEF, a mathematical model for calculating the PEF DC for different types of cold production was developed. The results in this study reveal that the PEF DC can be significantly improved in the case of combined cooling and power generation. The PEF DC in the case of combined cooling and power generation is lower than when cooling with electrically driven compressor chillers when the energy efficiency of the electricity generation in thermal power plant is low or the PEF of the electricity (PEF el) is high. In cold production technologies where coal is used as the primary energy source more primary energy is consumed compared to other primary energy sources (i.e. natural gas, waste heat, etc.).

• Jezik: Angleški jezik
• Ključne besede: primary energy factor, combined generation, district cooling, chiller
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2016
• Št. strani: Str. 717-729
• Številčenje: Vol. 62, nro 12
• PID: 20.500.12556/RUL-126297
• UDK: 621.565.9(045)
• ISSN pri članku: 0039-2480
• URN: URN:NBN:SI:doc-BIYYZLO5
• DOI: 10.5545/sv-jme.2016.3777
• COBISS.SI-ID: 15130651

Avtorske pravice

© 2016 Journal of Mechanical Engineering

• Datum objave v RUL: 15.04.2021

Gradivo je del revije

• Naslov: Strojniški vestnik
• Skrajšan naslov: Stroj. vestn.
• Založnik: Zveza strojnih inženirjev in tehnikov Slovenije [etc.], = Association of Mechanical Engineers and Technicians of Slovenia [etc.
• ISSN: 0039-2480
• COBISS.SI-ID: 762116

Sekundarni jezik

• Jezik: Slovenski jezik
• Naslov: Faktor primarne energije sistema daljinskega hlajenja

Izvleček

V zadnjem desetletju EU zavzema aktivnejšo vlogo na področju energijske učinkovitosti oziroma zmanjšanja rabe energije ter na področju izkoriščanja obnovljivih virov energije. Kot orodje za določitev energijsko učinkovitejših procesov v smislu minimalne rabe primarne energije nam lahko služi faktor primarne energije (PEF). Definiran je kot razmerje med celotno primarno energijo, ki je potrebna za proizvodnjo nekega končnega energetskega produkta, in končnim energetskim produktom. V primeru sistema daljinskega hlajenja je energetski produkt hlad, ki ga dobavljamo končnim odjemalcem. Faktor primarne energije upošteva energijo, ki je potrebna za pretvorbo primarnih virov energije, shranjevanje, transport, distribucijo končnega produkta do odjemalcev ter celotne izgube, povezane s temi procesi.

• Ključne besede: faktor primarne energije, proizvodnja hladu, daljinsko hlajenje, hladilnik