Navalyze · Bulk carrier · Ship

WEN ZHU HAI

IMO: 9488475
Type: Bulk carrier
Average cargo carried: 32,806 t
Flag (estimated): China
Port of registry: Tianjin
Technical efficiency: EEXI 3.61 g CO₂/t·nm

ISM company (DoC holder) in 2025: COSCO SHIPPING BULK CO., LTD · part of COSCO Shipping

Report year

2019 at a glance

From the 2019 THETIS-MRV report. Carries about 44,971 t of cargo on average.

Fuel kg/nm

100

Bulk carrier median 91.2 kg/nm (+10%)

CO₂ per transport work (cargo)

6.99

g CO₂/t·nm · Bulk carrier median 8.38 (−17%)

Average speed

10.5 kn

Bulk carrier median 10.3 kn (+2%)

Fuel per day at sea

25.2 t/day

Fuel consumed

765 t

CO₂ emitted

2,401 t

Distance sailed

7,638 nm

CO₂ ÷ CO₂ per mile

Time at sea

730 h

30 days, 8% of the year

Within the bulk carrier fleet, 2025

Set against all 3,611 bulk carrier ships with a full-year 2025 report. Bigger ships burn more per mile but less per tonne of cargo, so read fuel per mile with the ship's size in mind.

Fuel kg/nmThis ship 98.3 kg/nm · median 82.6 (+19%)

61.0Ranks 2,849 of 3,611, lowest first114

Average speedThis ship 11.3 kn · median 10.7 (+6%)

8.8Faster than 76% of bulk carrier ships11.8

CO₂ per transport work (cargo)This ship 9.35 g CO₂/t·nm · median 7.90 (+18%)

4.80Ranks 2,398 of 3,611, lowest first15.9

Middle 80% of shipsMiddle 50%Bulk carrier medianThis ship

Where the emissions happen, 2019

THETIS splits each ship's CO₂ by voyage type. The split sets how much falls under the EU ETS: all of it within the EU and at berth, half of it on voyages into or out of the EU.

Between EU ports0%
From the EU0%
Into the EU91%
At berth in the EU9%

Fuel burned laden

–

Not reported

CO₂ at berth

215 t

9.0% of the ship's CO₂, alongside in EU ports

Methane (CH₄)

–

Mainly from LNG; small for oil, biofuel and methanol

CO₂eq uplift

–

CO₂eq on top of CO₂ alone, from CH₄ and N₂O

Over the years

Full-year reports only. The Bulk carrier median is the middle ship of all bulk carrier ships reporting that year; it moves with the fleet, so a ship can gain on it without changing itself.

Fuel kg/nm

WEN ZHU HAI
Bulk carrier median

80.090.0100.0110.0120.0

’192019’202020’212021’222022’232023’242024’252025

Average speed, kn

WEN ZHU HAI
Bulk carrier median

10.010.511.011.512.0

’192019’202020’212021’222022’232023’242024’252025

CO₂ per transport work (cargo), g CO₂/t·nm

WEN ZHU HAI
Bulk carrier median

4.06.08.010.012.014.0

’192019’202020’212021’222022’232023’242024’252025

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	+0.4 kn	+6%	+9%	−48%	+60%	0.4 kn faster, fuel per mile up 6%; in line with the speed change.
2023→2024	+0.4 kn	−7%	−3%	−33%	−6%	0.4 kn faster, fuel per mile down 7%; better than speed alone explains (hull, engine or trade).
2022→2023	−0.4 kn	+6%	+1%	+4%	−34%	0.4 kn slower, fuel per mile up 6%; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	−1.0 kn	−17%	−23%	+74%	−26%	1.0 kn slower, fuel per mile down 17%; in line with the speed change.
2020→2021	+1.1 kn	+17%	+29%	−7%	+97%	1.1 kn faster, fuel per mile up 17%; in line with the speed change.
2019→2020	+0.3 kn	−3%	−0%	+101%	−7%	0.3 kn faster, fuel per mile down 3%; better than speed alone explains (hull, engine or trade).

Fuel per mile rises roughly with the square of speed for a given ship, so a change in speed explains much of a change in fuel per mile.

Every reporting year

One row per THETIS-MRV report. A ship that changed operator during a year has a part-year report for each.

Operation

Year	ISM company	Fuel t	CO₂ t	Distance nm	Hours at seah	Average speedknots at sea	Fuel kg/nmthis ship	CO₂ per transport work (cargo)g/t·nm, this ship	Laden fuel
2025	COSCO SHIPPING BULK CO., LTD	893	2,785	9,080	805	11.3	98.3	9.35	–
2024	COSCO SHIPPING BULK CO., LTD	1,618	5,092	17,404	1,594	10.9	93.0	5.85	–
2023	not published	2,590	8,121	25,832	2,462	10.5	100	6.21	–
2022	not published	2,361	7,435	24,951	2,280	10.9	94.6	9.43	–
2021	not published	1,628	5,142	14,351	1,203	11.9	113	12.8	–
2020	not published	1,491	4,708	15,352	1,426	10.8	97.1	6.50	–
2019	not published	765	2,401	7,638	730	10.5	100	6.99	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Bulk carrier median	vs Bulk carrier	Rank	Verifier	Methods
2025	COSCO SHIPPING BULK CO., LTD	9.35	7.90	+18%	2,398 of 3,611	China Classification Society	A
2024	COSCO SHIPPING BULK CO., LTD	5.85	8.09	−28%	633 of 3,089	China Classification Society	A
2023	not published	6.21	8.27	−25%	844 of 3,548	China Classification Society	A
2022	not published	9.43	8.71	+8%	2,286 of 3,968	China Classification Society	A
2021	not published	12.8	8.57	+50%	2,887 of 3,466	China Classification Society	A
2020	not published	6.50	8.24	−21%	822 of 3,150	China Classification Society	A
2019	not published	6.99	8.38	−17%	1,102 of 3,360	China Classification Society	A

Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. Bulk carrier ships are benchmarked on CO₂ per transport work (cargo) (TW), in g CO₂/t·nm. CO₂eq adds methane and nitrous oxide and is in the public files from 2024. Rank counts from the lowest figure among that year's bulk carrier ships. Methods: A delivery notes, B tank monitoring, C flow meters, D direct measurement. FuelEU GHG intensity is not shown: it needs fuel types, which the public file does not carry. Operators are named only from 2024, the first year the public files carry them; earlier years belong to the ship, not to any company.