摘要:
Ein Verfahren zur Rückverflüssigung und Kühlung von Flüssigerdgas mittels Flüssigstickstoff für Tanksysteme auf beziehungsweise in Wasserfahrzeugen, Schwimmkörpern und dergleichen, welche zur Übertragung von Flüssigerdgas geeignet sind.
摘要:
An inland waterway tanker for transportation of liquid product over inland waterways, e.g. crude oil. The tanker comprises cargo tanks in a double hull configuration. A combustible fuel powered propulsion engine is cooled preferably by a closed cooling water circuit with a pump and a first heat exchanger arranged in a below waterline recessed compartment to exchange heat between the cooling water and outboard water. A cargo tank heating system comprises a closed thermal oil circuit with heat exchanger ducts to heat the liquid product in the cargo tanks. A high-temperature thermal oil heating device has capacity to heat the thermal oil in said circuit to a temperature above 100 °C. The heating system further comprises a thermal oil circuit heat exchanger adapted to exchange heat between the cooling water and the thermal oil in order to allow for heating of the liquid product in the one or more cargo tanks by heat recovered from the cooling water emerging from the propulsion engine. The cooling water circuit comprises a bypass duct and one or more valves to allow for selectively bypassing the cooling water about the cooling water flow path in the thermal oil circuit heat exchange.
摘要:
An enclosed offshore tank for storing crude oil in a flowable form where the problems associated with flow assurance are prevented. The enclosed offshore tank includes a floor, an insulated cover and perimeter wall secured to a floor forming the offshore tank. The enclosed offshore tank can include a means of floor heating, wherein the floor is provided with piping which receives heated fluid to heat the crude oil. The perimeter wall can have an inner wall and an outer wall forming an annulus, wherein a heated fluid from a heating source fills the annulus to heat the crude oil. A microwave heating system can include at least one microwave generator, at least one waveguide and at least one radiating element to indirectly heat crude oil in the offshore tank.
摘要:
Arrangement (1) for providing cooling energy to a cooling medium circuit (7) of a marine vessel (20) having a storage of liquefied gas (2), the arrangement having a gas feeding system (3) being provided with gas evaporation/heating apparatus (5). The gas evaporation/heating apparatus (5) is arranged in heat transfer connection with the cooling medium circuit (7) of the vessel (20) through an interme- diate flow circuit (6).
摘要:
An apparatus and method for controlling temperature in a boil-off gas in a liquefaction plant prior to compression, wherein boil-off gas originating from an LNG storage tank is compressed and at least partially condensed, and wherein said condensed boil-off gas (LNG) is being returned to the storage tank. A heat exhanger (20) is connected to the boil-off gas feed line upstream of the compressor (10), and a first conduit (22) fluidly connects the line for returning LNG to the storage tank and the heat exchanger (20). A second conduit (26) fluidly connects the heat exchanger (20) to the boil-off gas feed line at a point upstream of said heat exchanger (20). Boil-off gas is heat exchanged against said cooler (24) prior to being fed into said compressor (10). Thus, the boil-off gas temperature is lowered downstream of said heat exchange. With the present invention, a selected temperature or range of temperatures - for example determined by the compressor characteristics - may be used as a controlling parameter for the choke valve in order to control the flow through the cooler and into the boil-off gas feed line upstream of the heat exchanger.
摘要:
A ship includes: a gas-consuming apparatus for propulsion; a tank storing liquefied natural gas; a first supply line provided with a compressor, the first supply line leading boil off gas generated in the tank to the gas-consuming apparatus; a branch line whose both ends are connected to the first supply line at an upstream side of the compressor; a second supply line that takes the liquefied natural gas out of the tank, and leads vaporization gas resulting from vaporization of the liquefied natural gas to the gas-consuming apparatus or another gas-consuming apparatus; a heat exchanger that performs heat exchange between the liquefied natural gas flowing through the second supply line and the boil off gas flowing through the branch line; an adjustment valve that adjusts a flow rate of the boil off gas flowing through the branch line; and a controller that controls the adjustment valve such that, under a predetermined condition, a temperature of the liquefied natural gas flowing out of the heat exchanger is kept to a setting temperature.
摘要:
Arrangement for recovering the waste heat produced by a ship (1) engine in which arrangement the waste heat of the engine (2) is directed to a container located on the ship and including liquid when the ship is sailing and at a harbour the liquid is pumped from the mentioned container to a container or a pipework located on shore. The waste heat is directed to crude oil being the cargo of the ship and at the harbour the crude oil which is pre-heated for a refining process is pumped to the storage of an oil refinery or directly to the process pipework of the refinery.
摘要:
An LNG carrier having onboard regasification capability that includes a primary source of heat (21) for regasifying the LNG (24) is disclosed. Further, the LNG carrier includes at least one secondary source of heat for regasifying the LNG, a vaporizer (23), an intermediate fluid, and a pump (22) that circulates said intermediate fluid through said vaporizer and said primary and secondary sources of heat.