Study of sorption systems for application on low-emission fishing vessels

Abstract

Waste-heat driven refrigeration technology represents a promising alternative for food preservation on-board, that could help reducing pollutant emissions and, at the same time, limiting fuel consumption. Aim of the present work is the assessment of possible benefits arising from the use of thermally driven systems, with focus on two technologies: absorption and adsorption. A dynamic simulation of the whole waste heat recovery system and the sorption refrigerators has been performed. For the modelling of the thermally driven chillers, experimental data from two prototypes have been employed. The results show that, for a cooling load typical of the Italian fishing fleet, fuel savings up to 1600 kg/y can be achieved, corresponding to 3 ton/ y of avoided CO 2 emissions. Moreover, for bigger vessels with 10 kW cooling load needed, up to 7 times higher fuel savings can be obtained.

Decarbonising the Shipping Sector: A Critical Analysis on the Application of Waste Heat for Refrigeration in Fishing Vessels

“…Based on the analysis reported in [25] for fishing vessels that included a refrigeration system on board, three cases were selected, mainly differing in the dimensions and prime movers. In addition, according to what was reported in [20], a fourth case was considered, typical of the Mediterranean fleet, a vessel with 10 m 3 frozen fish storage, with 10 days of operation. The amount of fish that each vessel could hold was calculated using the cubic number (CUNO) method [26]: the fish hold is equal to CUNO × 0.14, where the CUNO is:…”

“…From such a literature review, it is clear that the vast majority of studies available are concentrated on the thermodynamic and dynamic efficiency of the system [17], or the development of prototypes for application on-board [18][19][20] and their testing [15,21]. Only a few studies have actually considered how the whole energy system could be included on-board and the possible implications of the installation of such a system.…”

“…For instance, in [14,22], a complete system for providing heating, cooling, and refrigeration demand on a container ship was modelled in the dynamic systems modelling software TRNSYS, thus considering, on the one hand, the dynamic behaviour under realistic conditions, and on the other hand, the actual connections of all the components of the system. In [20], the effect of the sorption system was evaluated, in terms of weight and therefore extra fuel consumption, proving that the benefits arising from the use of such a system are strictly dependent on the routes followed and the duration of the cruise. Nonetheless, the integration of these innovative energy systems within the ship architecture and its already complex power generation system has not been properly addressed up to now.…”

“…Nonetheless, the integration of these innovative energy systems within the ship architecture and its already complex power generation system has not been properly addressed up to now. In [20,23,24], only the waste heat recovery system was included in the energy and environmental analysis of refrigeration systems for fishing vessels. The results, however, demonstrated the need for a careful evaluation of the sorption systems in relation to the operational features of the ship, i.e., days at sea, dimension of the cold room, and so on.…”

Comprehensive Parametric Study of a Solar Absorption Refrigeration System to Lower Its Cut In/Off Temperature

“…However, additional power is needed to run the auxiliaries (fans and cooling water pumps). Palomba et al [25] recently reported that the power consumed by auxiliaries in AARS can be estimated as 23 W/kW cooling . Hence, for a system with 100 kW cooling power, the auxiliaries' power will be 2.3 kW.…”