Browsing Fakultet for ingeniørvitenskap (IV) by Author "Saeed, Muhammad Zahid"
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CO2 refrigeration system design and optimization for LNG driven cruise ships
Saeed, Muhammad Zahid; Hafner, Armin; Gabrielii, Cecilia H; Tolstorebrov, Ignat; Widell, Kristina Norne (Chapter, 2021)The cruise industry is in the evolution of eco-friendly technologies due to strict environmental regulations. Liquified natural gas (LNG) is an alternative marine fuel. Compared to conventional diesel fuels, LNG offers a ... -
Cryogenic cold utilization and system integration possibilities for LNG-driven fishing vessels
Saeed, Muhammad Zahid; Widell, Kristina Norne; Hafner, Armin; Nordtvedt, Tom Ståle; Svendsen, Eirik Starheim (Chapter, 2020)Liquified natural gas (LNG) fuelled vessels are increasing in the fishing industry due to its reduced environmental footprint as compared to vessels using heavy hydrocarbon fuels. Cryogenic tanks are used to store LNG on ... -
Development and validation of CO2 cooling systems with expansion work recovery
Saeed, Muhammad Zahid (Doctoral theses at NTNU;2024:286, Doctoral thesis, 2024)The 2023 revised strategy of the International Maritime Organization (IMO) emphasises achieving net-zero greenhouse gas emissions within the shipping sector. Notably, nearly 40% of the energy demand in passenger ships is ... -
Development of CO2 refrigeration systems and thermal energy storage for cruise ships
Andersen, Henrik (Master thesis, 2022)Kjølemedier som er brukt om bord på cruiseskip i dag er assosiert med en betydelig innvirkning på global oppvarming. Disse kjølemediene blir stadig mer regulert, noe som understreker viktigheten av å bruke bærekraftige ... -
Energy efficient and climate friendly cooling, freezing and heating onboard fishing vessels
Saeed, Muhammad Zahid (Master thesis, 2020)Abstract: Liquefied natural gas (LNG) fueled vessels are increasing in the fishing industry due to its reduced environmental footprint as compared to vessels applying heavy hydrocarbon fuels. Cryogenic tanks are used to ... -
Energy efficient and climate friendly cooling, freezing and heating onboard fishing vessels
Saeed, Muhammad Zahid (Master thesis, 2020)Andelen sjøfartøy som drives av flytende naturgass (LNG) i fiskeindustrien øker på grunn av deres reduserte miljøavtrykk sammenlignet med fartøy som utnytter tunge hydrokarbonbrensler. På skip oppbevares LNG i kryogene ... -
Evaluation of mid-scale hydrogen distribution chains for compressed hydrogen
Koshelkov, Igor (Master thesis, 2022)Hydrogen for industrielle applikasjoner har eksistert i mange år. Det begynte å gå inn i et forbrukermarked som et tilgjengelig bærekraftig alternativ til fossilt brensel for cirka ti år siden. Årsaken til bruk av hydrogen ... -
Experimental investigation of a transcritical CO2 refrigeration system incorporating rotary gas pressure exchanger and low lift ejectors
Saeed, Muhammad Zahid; Thatte, Azam; Banasiak, Krzysztof; Hafner, Armin; Pardiñas, Angel A. (Journal article; Peer reviewed, 2024)Natural refrigerants like CO2 are playing a significant role in making refrigeration and heat pump systems climate-friendly by slowly phasing out the high global warming refrigerants like hydrofluorocarbons (HFCs). However, ... -
Innovative refrigeration concept for passenger ships - combining CO2 refrigerant, cold recovery and cold storage
Pardiñas, Ángel Á.; Selvnes, Håkon; Gabrielii, Cecilia H; Saeed, Muhammad Zahid (Chapter, 2022)More stringent international regulations on ship's emissions require a shift towards more climate friendly fuels, such as liquefied natural gas (LNG). On LNG-driven ships, the fuel is stored onboard at cryogenic temperature. ... -
Integrated thermal storage and heat recovery of the CO2 refrigeration system for fishing vessels
Saeed, Muhammad Zahid; Widell, Kristina Norne; Hafner, Armin; Nordtvedt, Tom Ståle; Svendsen, Eirik Starheim (Chapter, 2020)The natural refrigerant CO2 is gaining an attraction for fishing vessels due to its compact units, negligible global warming potential (GWP), and non-toxic behaviour. Chilling and freezing onboard are energy-consuming ... -
Integrated thermal system for hydrogen and ammonia driven cruise ship
Egerdahl, Magnus (Master thesis, 2022)Cruiseskipindustrien står overfor utslippsreguleringer på grunn av klimaendringer og global oppvarming. Tradisjonelt fossilt drivstoff som brukes til fremdrift og energibehov ombord på cruiseskip resulterer i et høyt ... -
Investigation of CO2 refrigeration system and thermal energy storage for passenger ships
Andersen, Henrik; Saeed, Muhammad Zahid; Hafner, Armin; Gabrielii, Cecilia H (Chapter, 2023) -
Mid-scale hydrogen distribution chains
Jacobsen, Lene Dahl (Master thesis, 2023)Dagens næringer streber etter å redusere karbonfotavtrykket og å gå inn i den grønne omstillingen verden sårt trenger. Hydrogen har vist seg å være en lovende løsning for grønn energi. Det er en allsidig energibærer som ... -
Simultaneous implementation of rotary pressure exchanger and ejectors for CO2 refrigeration system
Saeed, Muhammad Zahid; Hafner, Armin; Thatte, Azam; Gabrielii, Cecilia H (Chapter, 2022)Natural refrigerant CO2 has become a viable choice for refrigeration units. The CO2 systems are working efficiently on land-based facilities, and their demand is increasing for offshore applications, e.g., cruise ships and ... -
Thermal energy recovery and storage for a hydrogen fuel cell and battery driven cruise ship
Olberg, Vanja Revold (Master thesis, 2022)Den maritime sektoren møter strengere krav i forbindelse med klimagassutslipp basert på fremtidsplaner om nullutslippshavner langs Norges kyst innen 2026 og restriksjoner pålagt av Den internasjonale sjøfartsorganisasjonen ... -
Thermal Energy Storage with PCM for Refrigerated Sea Water System of Fishing Vessels
Saeed, Muhammad Zahid; Widell, Kristina Norne; Hafner, Armin; Svendsen, Eirik Starheim; Nordtvedt, Tom Ståle (Peer reviewed; Journal article, 2021)This paper investigates thermal storage integration with the refrigerated seawater (RSW) system of a fishing vessel. Four different scenarios were investigated, including ice in tanks, two design modifications in chilling ... -
Thermodynamic analysis of rotary pressure exchanger and ejectors for CO2 refrigeration system
Saeed, Muhammad Zahid; Pardiñas, Ángel Á.; Banasiak, Krzysztof; Hafner, Armin; Thatte, Azam (Journal article; Peer reviewed, 2024)Natural refrigerant CO2 has become a viable choice for refrigeration units for land-based and offshore applications due to its environment-friendly nature and compactness. The CO2 transcritical cycle allows operating in ... -
Ultra-Low-Temperature Refrigeration Systems: A Review and Performance Comparison of Refrigerants and Configurations
Saeed, Muhammad Zahid; Contiero, Luca; Blust, Stefanie; Allouche, Yosr; Hafner, Armin; Eikevik, Trygve Magne (Peer reviewed; Journal article, 2023)During the last decade, many industrial and medical applications have shown a requirement for low-temperature-cooling usage (from −40 to −80 °C), which cannot be efficiently obtained via the conventional refrigeration ...