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Assessment of energy losses for the climate shell in a commercial passenger ship
Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Bio- och miljösystemforskning (BLESS), Energivetenskap.
2015 (Engelska)Självständigt arbete på avancerad nivå (magisterexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
Abstract [en]

The shipping industry is facing a major challenge. Current and future emission requirements result in considerably increased operating costs. Studies have shown that it is a large potential to reduce the ship operating costs by energy effectivisation. The focus has naturally been on systems with major energy losses, such as combustion engines, propulsion and hull friction.

A passenger ship like Stena Danica with a big climate controlled accommodation could be expected to have major heat losses. By calculating transmission losses from walls, ceilings, window sections, and the energy losses by ventilation, a general view of how heat losses are distributed has been established. The primary goal is to gather information that could be useful in further energy improvements.

Due to lack of information and deficiently measured data have several assumptions and simplifications been made. Despite this, the calculations can be considered as indicative. The results indicated that about 50 percent of the energy losses occur by ventilation and the remaining consists of transmission losses in windows sections and climate shell, (About 25% each). The focus in the calculations has been to estimate the accommodations heating demand. Energy improvements that reduce the heating demand will reduce the cooling demand as well. This may be a greater incentive for measures as the air conditioning system are powered with higher energy quality; electricity. Besides shore power the electricity is mainly generated by diesel generators. The energy used for heating is mainly produced by waste heat or is supplied by shoreside district heating.

Upgrading the ventilation systems are considered to be the most economic method to reduce the heat losses in the accommodation area. The ship's ventilation systems lack any type of demand control, this causes excessive energy losses as the ventilation demand vary greatly regarding to time of the day and numbers of passengers.

The ship has a large amount of single pane windows that also contributes to large energy losses. To upgrade or replace these are considered to be more economic than to improve the insulation on the rest of the climate shell as it doesn’t affect the interior to the same extent. The latter may be worth considering in case of a major renovation of the vessel.

Ort, förlag, år, upplaga, sidor
2015. , s. 38
Nationell ämneskategori
Energiteknik
Identifikatorer
URN: urn:nbn:se:hh:diva-29590OAI: oai:DiVA.org:hh-29590DiVA, id: diva2:859710
Handledare
Examinatorer
Tillgänglig från: 2015-10-12 Skapad: 2015-10-08 Senast uppdaterad: 2015-10-12Bibliografiskt granskad

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