DESC:FIELD OF INVENTION:
[001] The present invention generally relates to the field of ship building and particularly relates to a ship side exhaust system for main engine and diesel alternators.
BACKGROUND OF INVENTION:
[002] Conventionally in a ship, the exhaust of the main engine and the Diesel Generators flux gases are deducted vertically upward which finally ends in the superstructure. The initial design also considered the same arrangement. However, the ship sensitive sensors are affected by the high temperature of the exhaust and soot due to the sensors positioning in the upper deck. Additionally, the location of the sensors also precluded the fitment of a funnel.

[003] In the conventional approach, all the exhaust are together routed from the lower deck to the upper deck of the ship, thereby consuming huge space in the ship and reserving the top deck which otherwise may be used for accommodation and mission specific spaces. On the top decks if some sensitive equipment /sensor exists, then the performance of the exhaust can be affected due to hot black soot.

[004] It was observed that the various sensors of the ship were located on upper decks. These sensors were being affected by the high temperature of the exhaust and soot. Hence, there was a need to protect the sensors which are located on upper decks from the ill-effect of the high temperatures of exhaust gases and soot. One attempt to achieve this is made in CN111894702 which suggests a shipboard side exhaust system. The said system comprised of main engine outlet reducing pipe, exhaust expansion joint, exhaust elbow, side row square muffler, Exhaust expansion joint, water collection short pipe, exhaust elbow, side flap valve, side connection pipe, side flow cap, drain, side row square muffler inside equipped with a thermal insulation layer, the exhaust pipe and pipeline accessories are all laid with a thermal insulation layer, and the exhaust system is elastically installed on the hull structure. However, as can be seen from above, the system of CN ‘702 essentially depends on the use of heat insulations. This would essentially increase the cost input of the system.

[005] Further, the current systems used in ships are very bulky and span multiple decks. Hence, the conventional system tends to encroach upon the limited space available on the ship deck.

[006] Therefore, there is still a need to develop a system that is economical and effectively utilises the space available on the ship.

SUMMARY OF INVENTION:
[007] In view of the above, the primary object of the invention is to provide an exhaust system that is economical and effectively utilises the space available on the ship.

[008] It is yet another object, the invention intends to provide such ship side exhaust system that reduces the damage to the sensors which are placed on the ship caused due to high temperatures of the exhaust gases and soot.

[009] In another object, the invention intends to provide a system that provides good workable space inside the ship, thereby reducing the wastage of useful sites and improving the volumetric efficacy of the ship.

[010] The present invention pertains to a ship side exhaust system that is economical and prevents damage to the sensitive sensors located on the upper decks of the ship.

[011] In an aspect of the present invention, a ship side exhaust system for main engines and diesel alternators comprising an exhaust duct is located above the waterline on the side of the ship and passed above a damage control deck, a goose neck structure is positioned above the damage control deck, wherein the goose neck structure allows the exhaust duct to bend at a 180° angle.

[012] In an aspect of the present invention, the exhaust duct is routed from the main engines and diesel alternators to the ship's side.

BRIEF DESCRIPTION OF DRAWINGS:
[013] The invention has other advantages and features which will be more readily apparent from the following detailed description of the invention and the appended claims, when taken in conjunction with the accompanying drawings, in which:
Fig. 1: illustrates the exhaust system of the present invention.
Fig. 2: illustrates the conventional exhaust system known in the art.

DETAILED DESCRIPTION OF INVENTION:
[014] The invention will now be described in detail in connection with certain preferred and optional embodiments, so that various aspects thereof may be more fully understood and appreciated. As used herein, the following terms and phrases shall have the meaning set forth below.

[015] Unless specified otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art, to which this invention belongs. Although any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention, the preferred methods and materials are described.

[016] Unless stated to the contrary, any of the words “contains”, “containing”, "including," "includes," "comprising," and "comprises" mean "including without limitation" and shall not be construed to limit any general statement that it follows to the specific or similar items or matters immediately following it. Embodiments of the invention are not mutually exclusive, but may be implemented in various combinations. The described embodiments of the invention and the disclosed examples are given for the purpose of illustration rather than limitation of the invention.

[017] Further, words like “a”, “an”, “at least” and “the” should be construed to not only cover singular quantities but also plural quantities of the elements immediately following them.

[018] The present invention describes a novel ship side exhaust system that prevents any damage to the sensors placed on the upper decks by eliminating the exhaust gases just above the sealine of the ship.

[019] As illustrated in Fig.1, the ship side exhaust system 100 for main engines and diesel alternators consists of the exhaust duct 10 is located above the waterline on the side of the ship and passed above a damage control deck, a goose neck structure 20 is positioned above the damage control deck, wherein the goose neck structure 20 allows the exhaust duct 10 to bend at a 180° angle.

[020] In a preferred embodiment, the exhaust duct 10 is required to be given a 180° bend after reaching the main deck to bring it down till the waterline exhaust at shipside. The goose neck structure 20 above the damage control deck to meet the damage stability criteria and conceptualize the size of the exhaust duct 10 and with bends to meet the total pressure drop criteria. If this pressure drop takes place, required power cannot be obtained from main engine, which finally results in reduction of speed of the vessel.

[021] With the pressure drop criteria as the condition, a route with admissible duct sizes was made with a 180° goose bend in the exhaust line and the final outlet of the exhaust just above the waterline of the ship. While optimisation of the duct route, sizes, and components led to meeting the head loss criteria, the goose bend above the damage control deck met the damage flooding criteria. To arrive at this optimised concept, analytical duct loss calculation and CFD analysis using advanced numerical tools had to be used. This CFD analysis established the efficacy of the concept as the total back pressure of the exhaust system was 2.7 Kpa, which was well within the OEM specified limit of 3.4 Kpa.

[022] As locating the exhaust on the upper decks was not possible the only option was to undertake a concept to provide the exhaust on the ship’s side above the waterline. However, this concept was compounded by several unique features of this ship some of which are:
(a) Two main engines of 9.2 MW each.
(b) 9 Diesel alternators of capacity 1.2 MW each located in four separate compartments.
(c) Requirement of ensuring that water does not enter the exhaust from the sea side. Hence the limitations caused by damage control requirements.
(d) Limitations caused by pressure drop because of the bends arising in the system.
(e) Extreme high temperature of the exhaust meeting the surface close to sea water.
[023] Although a particular exemplary embodiment of the invention has been disclosed in detail for illustrative purposes, it will be recognized by those skilled in the art that variations or modifications of the disclosed invention, including the rearrangement in the configurations of the parts, changes in steps and their sequences may be possible. Accordingly, the invention is intended to embrace all such alternatives, modifications, and variations as may fall within the spirit and scope of the present invention.
[024] The foregoing descriptions of specific embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teaching.

ADVANTAGES OF THE INVENTION:
[025] The present invention provides a ship side exhaust system that prevents potential damage to sensitive sensors placed on upper decks, ensuring their reliability and longevity.

[026] The present invention provides a ship side exhaust system that offers an economical solution for designing an effective exhaust system that meets various criteria such as pressure drop, stability, and sensor protection.

[027] The present invention provides a ship side exhaust system that can be used in newly built ships or in cases where the location of the funnel cannot be positioned on top
,CLAIMS:1. A ship side exhaust system 100 for main engines and diesel alternators, comprising:
an exhaust duct 10 located above the waterline on the side of the ship and passed above a damage control deck;
a goose neck structure 20 positioned above the damage control deck, wherein the goose neck structure 20 allows the exhaust duct 10 to bend at a 180° angle.
2. The ship side exhaust system 100 as claimed in claim 1, wherein the exhaust duct 10 routed from the main engines and diesel alternators to the ship's side.