CN208109735U - Cargo tank cold conditions rate of evaporation system - Google Patents
Cargo tank cold conditions rate of evaporation system Download PDFInfo
- Publication number
- CN208109735U CN208109735U CN201820624939.9U CN201820624939U CN208109735U CN 208109735 U CN208109735 U CN 208109735U CN 201820624939 U CN201820624939 U CN 201820624939U CN 208109735 U CN208109735 U CN 208109735U
- Authority
- CN
- China
- Prior art keywords
- gas
- cargo tank
- cold conditions
- signal amplifier
- flow transducer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model provides a kind of cargo tank cold conditions rate of evaporation system, cargo tank is equipped with gas chamber and heat preservation insulation, and the measuring system includes heat flow transducer, signal amplifier, data logger, gas heater, gas mass flow meter and evaporator pipeline；The heat flow transducer is fixed in heat preservation insulation, and heat flow transducer is connect by conducting wire with signal amplifier circuit, and signal amplifier passes through conducting wire and data logger circuit connection；One end of the evaporator pipeline is connected to gas chamber, and the other end is connected to gas heater, and gas heater is connected to by conduit with gas mass flow meter.The utility model is safe and reliable, can be derived that more accurate rate of evaporation as a result, improving measurement accuracy, reduces measurement error；And using when do not need mobile cargo tank, measuring system is not limited by cargo tank volume of compartment and weight.
Description
Technical field
The utility model relates to liquefied gas carrier field, especially a kind of cargo tank cold conditions rate of evaporation system.
Background technique
Currently, the consumption of world's Gas Energy Source and gas industrial chemicals demand are in continue ascendant trend, this is transported to liquefied gas
The development of defeated ship (abbreviation liquefied gas carrier) brings very big opportunity to develop.Under this international situation, each Ship Design unit all increases
The big R&D intensity to liquefied gas carrier.
During designing and producing liquefied gas carrier, the design and construction of cargo tank are the most important things.And cargo tank is cold
Charging ratio limitation and underway safety, cargo tank cold conditions are steamed when the size relation of state evaporation rate is to Shipping liquefied gas
The size of hair rate is whether rationally and production technology foundation whether up to standard to measure cargo tank design.In order to ensure liquefied gas carrier
The design and construction of cargo tank reach expected requirement, need to carry out cargo tank the measurement of cold conditions evaporation rate.Existing evaporation rate
Measuring system is mainly weight method and natural boosting method.Weight method is fairly simple, but is only applicable to the measurement of small containers；It is natural
Boosting method is suitable for closed low-temperature liquid storage container, but is only applicable to that the storage tank of larger pressure, and measurement process can be born
There are security risks for mesohigh closed environment.Therefore, which kind of method is cargo tank cold conditions more acurrate can more safely be measured using
Evaporation rate is those skilled in the art's technical issues that need to address.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of cargo tank cold conditions rate of evaporation systems, use peace
It is complete accurate, the defect in the prior art can be overcome.
In order to solve the above-mentioned technical problem, the utility model adopts the following technical solution：A kind of cargo tank cold conditions evaporation rate
Measuring system, cargo tank are equipped with gas chamber and heat preservation insulation, and the measuring system includes heat flow transducer, signal amplifier, number
According to recorder, gas heater, gas mass flow meter and evaporator pipeline；The heat flow transducer is fixed on heat preservation insulation
On, heat flow transducer is connect by conducting wire with signal amplifier circuit, and signal amplifier passes through conducting wire and data logger circuit
Connection；One end of the evaporator pipeline is connected to gas chamber, and the other end is connected to gas heater, and gas heater passes through conduit
It is connected to gas mass flow meter.
Preferably, a pressure gauge is equipped on the evaporator pipeline and conduit.
Preferably, the conducting wire is low temperature resistant electric lead.
Preferably, the heat flow transducer is mounted on the lower part of cargo tank.
As described above, the utility model cargo tank cold conditions rate of evaporation system, has the advantages that：
1, the utility model keeps the temperature insulating surface by acquisition boil-off gas flow and cargo tank and is passed to heat flow density, obtains
The quality of unit time boil-off gas and the importing heat of unit area, by the total heat absorption of heat Calculation evaporation for importing cargo tank
Amount, is calculated the liquid goods quality of evaporation endothermic.By the evaporative mass directly measured and the evaporation matter by absorbing heat Calculation
Measurement averagely obtains boil-off gas quality, and the evaporation rate finally obtained with average boil-off gas quality divided by liquid goods gross mass is big
It is small, it can be derived that more accurate rate of evaporation as a result, improving measurement accuracy, reduce measurement error.
2, this measuring system is safe and reliable, does not need mobile cargo tank, measuring system is not by cargo tank volume of compartment and again
The limitation of amount can more be widely used in the measurement of all kinds of cargo tanks.
3, this measuring system does not need boil-off gas boosting in cargo tank, enhances the safety that cargo tank production is built.
Detailed description of the invention
Fig. 1 is the schematic diagram of the utility model.
In figure：
1 cargo tank, 11 heat flow transducer
12 signal amplifier, 13 data logger
14 conducting wire, 2 liquid goods
The heat preservation insulation of 3 gas chambers 4
21 pressure gauge, 22 gas heater
23 gas mass flow meter, 24 evaporator pipeline
25 conduits
Specific embodiment
Structure depicted in Figure of description, ratio, size etc., only to cooperate the revealed content of specification, with
Understand for those skilled in the art and read, is not intended to limit the utility model enforceable qualifications, therefore does not have skill
Essential meaning in art, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing the utility model institute
Under the effect of capable of generating and the purpose that can reach, the model that the revealed technology contents of the utility model can be covered should all be fallen in
In enclosing.Meanwhile cited such as "upper", "lower", "left", "right", " centre " term in this specification, it is merely convenient to describe
Be illustrated, rather than to limit the enforceable range of the utility model, relativeness is altered or modified, without substantive change
Under technology contents, when being also considered as the enforceable scope of the utility model.
As shown in Figure 1, the utility model is a kind of cargo tank cold conditions rate of evaporation system, cargo tank 1 is equipped with gas chamber 3
With heat preservation insulation 4.The measuring system includes heat flow transducer 11, signal amplifier 12, data logger 13, gas heater
22, gas mass flow meter 23 and evaporator pipeline 24.The heat flow transducer 11 is fixed in heat preservation insulation 4 for acquiring heat
Current density signal, because heat flow density signal is weak voltage signal, heat flow transducer 11 is amplified by conducting wire 14 and signal
Weak voltage signal is amplified to observable voltage signal, last signal amplification by signal amplifier 12 by 12 circuit connection of device
Device 12 carries out the transmission of final data by conducting wire 14 and 13 circuit connection of data logger.Meanwhile described in the utility model
One end of evaporator pipeline 24 is connected to gas chamber 3, and the other end is connected to gas heater 22, and gas heater 22 passes through conduit 25
It is connected to gas mass flow meter 23, has display screen on gas mass flow meter 23, the gas that can be flowed through in the unit of display time
Body volume.Since the temperature of boil-off gas is too low, may cause measuring device can not be measured, it is therefore desirable to gas be arranged and add
Hot device 22, to obtain the gas temperature for being suitble to measurement.
By taking one day calculates liquid goods evaporation rate for the unit time as an example, illustrate the principles of the present invention：
(1) the liquid goods 2 of certain known quality is housed, heat flow transducer 11 will be collected from heat preservation insulation 4 in cargo tank 1
Heat flow density signal signal amplifier 12 is transferred to by conducting wire 14, after signal is amplified, then number is transferred to by conducting wire 14
Record and the analysis of data are carried out according to recorder 13.Continuous measurement record one day, measurement start and end time is recorded, then
The mean heat flux for flowing through 4 surfaces of heat preservation insulation under unit area is calculated, with the heat flow density multiplied by total face of heat preservation insulation 4
Product, obtains the total amount of heat of unit time incoming cargo tank, and the total amount of heat of incoming cargo tank is the total caloric receptivity of liquid goods evaporation, use
The quality of boil-off gas is calculated in Thermodynamics Formulas；Calculation formula is conventional means in the industry, is not stated specifically.
(2) at the same time, the gas evaporated from gas chamber 3 enters gas heater 22 by evaporator pipeline 24 and heats,
Gas after heating by conduit 25 be transferred to gas mass flow meter 23 be evaporated the measurement of gas flow, record and point
Analysis.The gas flow flowed through in one day is obtained in this step, passes through the quality for the boil-off gas that flow velocity can be leaked.
It can be uniformly processed by the gas of gas mass flow meter 23.
(3) finally, the boil-off gas that will directly be measured in the quality for the boil-off gas being calculated in (1) and (2)
Quality be averaged, then with the average value divided by the gross mass of liquid goods 2 to get one day out liquid goods evaporation rate.
According to different situation needs, the unit time can be arbitrarily arranged, if allow (1) and (2) acquisition data time
It is identical.
Before being actually used, all appts instrument is both needed to by debugging and verifying before use.Because of the stream of gas
Speed is unknown, and the temperature setting of gas heater 22 need to be tested in advance, to obtain suitable gas outlet temperature.Gas passes through
Outlet temperature after gas heater 22 should be greater than 5 DEG C.It should ensure that liquid goods 2 does not shake in cabin in measurement process, because of liquid goods 2
Shaking will affect the accuracy of final evaporation rate result.
For the safty in use, it is equipped with a pressure gauge 21 on the evaporator pipeline 24 and conduit 25, in use, needing
Ensure gas pressure in rated range.Specifically in measurement process, the numerical value of two pressure gauges 21 should not exceed 0.6bar.
In a preferred embodiment, the conducting wire 14 is low temperature resistant electric lead.
In conclusion the utility model cargo tank cold conditions rate of evaporation system, effectively overcomes in the prior art one
A little practical problems are to have very high utility value and use meaning.
Above embodiment is only illustrative of the principle and efficacy of the utility model, and not for limitation, this is practical new
Type.The utility model can be improved there are many more aspect under the premise of without prejudice to overall thought, for being familiar with this technology
Personage can all be carried out modifications and changes to above-described embodiment under the spirit and scope without prejudice to the utility model.Therefore,
Such as those of ordinary skill in the art is in spirit revealed without departing from the utility model and institute under technical idea
All equivalent modifications or change completed, should be covered by the claim of the utility model.
Claims (4)
1. a kind of cargo tank cold conditions rate of evaporation system, cargo tank (1) is equipped with gas chamber (3) and heat preservation insulation (4), feature
It is：The measuring system includes heat flow transducer (11), signal amplifier (12), data logger (13), gas heater
(22), gas mass flow meter (23) and evaporator pipeline (24)；The heat flow transducer (11) is fixed on heat preservation insulation (4)
On, heat flow transducer (11) passes through conducting wire by conducting wire (14) and signal amplifier (12) circuit connection, signal amplifier (12)
(14) with data logger (13) circuit connection；One end of the evaporator pipeline (24) is connected to gas chamber (3), the other end and gas
Body heater (22) connection, gas heater (22) are connected to by conduit (25) with gas mass flow meter (23).
2. cargo tank cold conditions rate of evaporation system according to claim 1, it is characterised in that：The evaporator pipeline
(24) and on conduit (25) it is equipped with a pressure gauge (21).
3. cargo tank cold conditions rate of evaporation system according to claim 1, it is characterised in that：The conducting wire (14) is resistance to
Low temperature electric lead.
4. cargo tank cold conditions rate of evaporation system according to claim 1, it is characterised in that：The heat flow transducer
(11) it is mounted on the lower part of cargo tank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820624939.9U CN208109735U (en) | 2018-04-28 | 2018-04-28 | Cargo tank cold conditions rate of evaporation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820624939.9U CN208109735U (en) | 2018-04-28 | 2018-04-28 | Cargo tank cold conditions rate of evaporation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208109735U true CN208109735U (en) | 2018-11-16 |
Family
ID=64114897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820624939.9U Active CN208109735U (en) | 2018-04-28 | 2018-04-28 | Cargo tank cold conditions rate of evaporation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208109735U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111579575A (en) * | 2020-04-09 | 2020-08-25 | 海洋石油工程股份有限公司 | A on-line monitoring system for LNG storage tank evaporation rate test |
-
2018
- 2018-04-28 CN CN201820624939.9U patent/CN208109735U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111579575A (en) * | 2020-04-09 | 2020-08-25 | 海洋石油工程股份有限公司 | A on-line monitoring system for LNG storage tank evaporation rate test |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103308293B (en) | A kind of high temperature valve detection experiment system | |
| CN106338323B (en) | A kind of flowmeter in-situ calibration method and verification system | |
| CN105551542A (en) | Water-cooling containment simulation device | |
| CN208109735U (en) | Cargo tank cold conditions rate of evaporation system | |
| CN101470021B (en) | Temperature-pressure method for hydrogen gas consumption measurement | |
| CN111413371A (en) | Self-calibration device and method for seawater conductivity sensor | |
| CN207585645U (en) | Suitable for the portable intelligent static evaporation rate test device of LNG vehicle gas cylinders | |
| CN207716093U (en) | Vehicle-mounted LNG gas cylinders performance monitoring device | |
| CN107202619A (en) | A kind of container boiling water water level measurement method and device based on multiple repairing weld | |
| CN108917891B (en) | High-temperature liquid flow standard device | |
| CN105527369B (en) | A kind of implementation method of the kinetics detection means for the hydrogen catalysis plate that disappears | |
| CN106289372B (en) | Welded insulated gas cylinder Daily boil-off-rate measuring instrument test method | |
| CN107991224A (en) | A kind of metal bellows corrosion resistance experimental method | |
| CN103698092B (en) | The quantitative leak detecting device of pressure system | |
| CN105784257B (en) | A kind of minor diameter ball bed high-temperature helium pressure drop measuring device and method | |
| CN207716094U (en) | Welded insulated gas cylinder pressure liquid level heat-insulating property measuring device | |
| CN108511094A (en) | It is a kind of to be used to monitor reactor core liquid level and the device and method of vacuole | |
| CN112197831A (en) | Method for measuring irregular large volume by using gas state change method | |
| KR102304493B1 (en) | Flow measurement system and method for determining at least one property of a medium | |
| CN112763368B (en) | QCM (quaternary ammonium chloride) experimental system capable of adjusting different working conditions and adjusting method thereof | |
| CN106970108B (en) | Containment steam condensation heat transfer coefficient measurement experiment device and method | |
| CN111007112B (en) | System and method for online measurement of steam humidity based on conductivity method | |
| CN204007805U (en) | The online caliberating device of a kind of LNG filling machine | |
| KR102148120B1 (en) | Multi-source, flow-weighted complex sample system | |
| CN211783980U (en) | Ultrasonic heat meter testing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |