Advantages & benefits in converting to LNG Fuel tanks
1. Environmentally friendly.
2. ECO friendly with governmental support and approvals.
3. Compliance to the European and Asian approvals.
4. Flexible to made capacities ranging from 300 litres up to 600 litres – customer choices.
5. Based on factual analysis, the use of liquefied natural gas (LNG) is more economical than diesel (fuel cost saving 25-38.6%), safe, efficient, environmentally, and more in line with the country's future energy development direction. Liquefied natural gas (LNG) is recognized as the best energy.
Comparative analysis of energy saving between LNG and diesel vehicle
Since June 2016, the gradual increase of fuel oil price and the adjustment of national energy policy have caused the rising operating costs of enterprises, coupled with the increasing pressure of environmental protection. In order to reduce the running fuel cost of diesel vehicles, we make an energy-saving analysis of liquefied natural gas (LNG) vehicles and diesel vehicles for your reference.
1. Comparative analysis of energy characteristics:
| Item | LNG | Diesel |
| Component and utilization analysis | The main component is methane, which can be fully burned, and the combustion products are all carbon dioxide and water. Due to the purification process in the liquefaction process, the gas composition is stable, free of impurities, and the utilization rate is up to 92-94%. | The main composition is high carbon compounds, hydrocarbons, before combustion must be atomized, and contains more impurities, comprehensive utilization rate up to 85%. |
| Cleanness | No effect on combustion equipment. | Sulfur content is higher, has certain influence on the equipment, shorten the equipment maintenance period. |
| Calorific value | 11800Kcal/KG | 9180kcal/L |
| Safety | With a high ignition point, it is less likely to ignite than other fuels under the same conditions. LNG Weight is 0.664 of the air, even if the occurrence of leakage, can immediately drift away, not easy to have an explosion accident. | Low ignition point, easy to ignite the explosion, the use of a variety of processes, such as pumps, atomization and other processes, there exits safety risk. |
| Operation maintenance | Less floor space, less pollution and most of key equipment is austenitic stainless steel material, basically maintenance is not required. | In the operation, the labor cost of smoke and oil removal and the maintenance cost of the flue are increased. At the same time, other harmful equipment, such as NOx and SOx, is also needed to be added. The maintenance cost of the equipment is relatively high. |
2. Calorific value analysis of liquefied natural gas (LNG) and diesel oil
Calorific value of liquefied natural gas (LNG) : 11800 kcal /kg;
Calorific value of diesel: 9181 kcal/L
Therefore, when the same calorific value is obtained: For 1000L diesel, we need to use LNG as (9181×1000) ÷11800=778kg.
3. Economic analysis of liquefied natural gas (LNG) and diesel
i) The theoretical calculation
Suppose the company's diesel consumption is 1000L/ day, if your company changed the entire diesel to natural gas, the consumption of LNG is 778kg/ day. By calculation, the economic comparison of monthly and annual consumption of diesel oil and LNG can be obtained as follow chart (fuel price: 5.7 RMB /L for diesel and 4.5 RMB /kg for LNG):
2. Calorific value analysis of liquefied natural gas (LNG) and diesel oil
Calorific value of liquefied natural gas (LNG) : 11800 kcal /kg;
Calorific value of diesel: 9181 kcal/L
Therefore, when the same calorific value is obtained: For 1000L diesel, we need to use LNG as (9181×1000) ÷11800=778kg.
3. Economic analysis of liquefied natural gas (LNG) and diesel
i) The theoretical calculation
Suppose the company's diesel consumption is 1000L/ day, if your company changed the entire diesel to natural gas, the consumption of LNG is 778kg/ day. By calculation, the economic comparison of monthly and annual consumption of diesel oil and LNG can be obtained as follow chart (fuel price: 5.7 RMB /L for diesel and 4.5 RMB /kg for LNG):
|
Fuel |
Daily using |
Price |
Monthly fee |
Monthly saving |
Annual fee |
Annual saving |
|
Diesel |
1000L |
5.7 RMB/L |
171000 RMB |
/ |
2052000 RMB |
/ |
|
LNG |
778kg |
4.5 RMB/kg |
105000 RMB |
66000RMB |
1260300 RMB |
792000 RMB |
Analysis: cost saving rate, 6.6/17.1* 100% = 38.59%.
ii) Actual measurement and verification (data from logistics department of nanjing China resources gas co., LTD.)
Load 20 tons LNG truck 100 km LNG consumption: 35kg
The gas price is calculated by 4.5 RMB /kg, the fuel cost of 100 kilometers is 157.5RMB
Load 20 tons diesel truck 100 km LNG consumption: 37L
The diesel price is calculated at 5.7 RMB /L, and the cost for 100 kilometers is 210.9 RMB
Analysis: cost saving rate (210.09-157.50) /210.09* 100% = 25.03%.
4. Comparison of the effect of diesel and natural gas (LNG) on combustion equipment
2. Calorific value analysis of liquefied natural gas (LNG) and diesel oil
Calorific value of liquefied natural gas (LNG) : 11800 kcal /kg;
Calorific value of diesel: 9181 kcal/L
Therefore, when the same calorific value is obtained: For 1000L diesel, we need to use LNG as (9181×1000) ÷11800=778kg.
3. Economic analysis of liquefied natural gas (LNG) and diesel
i) The theoretical calculation
Suppose the company's diesel consumption is 1000L/ day, if your company changed the entire diesel to natural gas, the consumption of LNG is 778kg/ day. By calculation, the economic comparison of monthly and annual consumption of diesel oil and LNG can be obtained as follow chart (fuel price: 5.7 RMB /L for diesel and 4.5 RMB /kg for LNG):
ii) Actual measurement and verification (data from logistics department of nanjing China resources gas co., LTD.)
Load 20 tons LNG truck 100 km LNG consumption: 35kg
The gas price is calculated by 4.5 RMB /kg, the fuel cost of 100 kilometers is 157.5RMB
Load 20 tons diesel truck 100 km LNG consumption: 37L
The diesel price is calculated at 5.7 RMB /L, and the cost for 100 kilometers is 210.9 RMB
Analysis: cost saving rate (210.09-157.50) /210.09* 100% = 25.03%.
4. Comparison of the effect of diesel and natural gas (LNG) on combustion equipment
|
No. |
Item |
Diesel |
LNG |
|
Burner regulation mode |
Two stage fire control |
Sliding stepless adjustment |
|
|
Temperature control |
Large temperature gradient, low control accuracy |
Small temperature gradient, high control accuracy. |
|
|
Use and maintenance |
Oil nozzles and oil filters need to be cleaned frequently |
Basically no maintenance |
|
|
Change in fuel consumption |
When the oil quality is poor, the oil nozzle is easy to be blocked, the fog effect becomes bad, fuel consumption increases sharply |
Clean gas, premixed combustion, combustion fully stable without change |
|
|
Cost of wearing parts |
Nozzles and pumps |
no |
|
|
Emission factor of harmful substances |
CO2:82.4kg/GJ SO2:0.99kg/GJ CO:14.7kg/GJ NOx: 0.193kg/GJ |
CO2:56.4kg/GJ SO2:0.005kg/GJ CO:3.1kg/GJ NOx: 0.111kg/GJ |
|
|
Service life |
The content of sodium, vanadium and sulfur in diesel is high and the high temperature and low temperature corrosion of the heating surface is large during combustion, and the service life of the equipment is relatively short. |
Gas does not contain sodium and vanadium, sulfur content is also very low, heating surface during combustion basically does not exist high and low temperature corrosion phenomenon, the normal operation period of the equipment is long. |
Based on the above analysis, the use of liquefied natural gas (LNG) is more economical than diesel (fuel cost saving 25-38.6%), safe, efficient, environmentally, and more in line with the country's future energy development direction. Liquefied natural gas (LNG) is recognized as the best energy.
335L Cylinder Technical data
335L LNG Tank （Chinese Standard）本体参数- 中国标准GB
|
No. |
Item |
Unit |
Data |
Remark |
|
1 |
Working pressure |
MPa |
1.59 |
|
|
2 |
Test pressure |
3.18 |
||
|
3 |
Main safety valve pressure |
1.9 |
||
|
4 |
Second safety valve pressure |
2.41 |
||
|
5 |
Design Temp |
℃ |
-196 |
|
|
6 |
Working Temp |
-162 |
||
|
7 |
Volume |
L |
335L |
|
|
8 |
Effective volume |
291L |
|
|
|
9 |
Tank material |
/ |
S30408/304/SUS304 |
|
|
10 |
X-ray nondestructive testing |
/ |
100%RT Ⅱ级 |
NB/T47013-2015 or GB/T17925-2011 |
|
11 |
Medium |
LNG |
||
|
12 |
Outer dimension |
656×1605 |
Φ×L(mm) |
|
|
13 |
Insulation |
High vacuum multilayer |
||
|
14 |
Max filling weight |
108Kg |
||
|
15 |
Empty weight |
220Kg |
||
|
16 |
Evaporation rate %/Day(LN2) |
≤2.4 |
||
Based on the above analysis, the use of liquefied natural gas (LNG) is more economical than diesel (fuel cost saving 25-38.6%), safe, efficient, environmentally, and more in line with the country's future energy development direction. Liquefied natural gas (LNG) is recognized as the best energy.
335L Cylinder Technical data
335L LNG Tank （Chinese Standard）本体参数- 中国标准GB
