Shipbuilding -- Ventilation and air-treatment of galleys and pantries with cooking appliances

ISO 9943:2009 specifies the design requirements and general considerations for the ventilation and air-treatment of galleys and pantries with cooking appliances on board merchant seagoing ships, when such ventilation and air-treatment is specified by the shipowner. It applies for normal conditions in all waters except those encountered in extremely cold or hot climates. For the purposes of ISO 9943:2009, pantries with cooking appliances, referred to above, are those which contain appliances consuming more than the small amount of electrical power needed for coffee urns, hot-plates for keeping food warm, electric water boilers, etc. Users of ISO 9943:2009 should note that, while observing its requirements, they should at the same time ensure compliance with such statutory requirements, rules and regulations as may be applicable to the individual ship concerned.

Construction navale -- Ventilation et traitement de l'air des cuisines et des offices avec appareils de cuisson à bord des navires

General Information

Status
Published
Publication Date
28-Apr-2009
Current Stage
6060 - International Standard published
Start Date
20-Apr-2009
Completion Date
29-Apr-2009
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INTERNATIONAL ISO
STANDARD 9943
Second edition
2009-05-15
Shipbuilding — Ventilation
and air-treatment of galleys and pantries
with cooking appliances
Construction navale — Ventilation et traitement de l'air des cuisines
et des offices avec appareils de cuisson à bord des navires
Reference number
ISO 9943:2009(E)
ISO 2009
---------------------- Page: 1 ----------------------
ISO 9943:2009(E)
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© ISO 2009

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Published in Switzerland
ii © ISO 2009 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 9943:2009(E)
Contents Page

1 Scope ..................................................................................................................................................... 1

2 Normative references ........................................................................................................................... 1

3 Terms and definitions........................................................................................................................... 1

4 Design requirements ............................................................................................................................ 2

4.1 General................................................................................................................................................... 2

4.2 Ordering information............................................................................................................................ 2

4.3 Summer conditions .............................................................................................................................. 2

4.4 Winter conditions.................................................................................................................................. 2

5 Airflow calculation................................................................................................................................ 3

5.1 Supply airflow ....................................................................................................................................... 3

5.2 Exhaust airflow ..................................................................................................................................... 4

Annex A (informative) Guidance and good practice..................................................................................... 5

Annex B (informative) Sensible and latent heat emission of galley appliances to room ......................... 7

Annex C (informative) Galley ventilation example ........................................................................................ 9

Annex D (informative) Galley ventilation/conditioning process................................................................ 12

© ISO 2009 – All rights reserved iii
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ISO 9943:2009(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies

(ISO member bodies). The work of preparing International Standards is normally carried out through ISO

technical committees. Each member body interested in a subject for which a technical committee has been

established has the right to be represented on that committee. International organizations, governmental and

non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the

International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards

adopted by the technical committees are circulated to the member bodies for voting. Publication as an

International Standard requires approval by at least 75 % of the member bodies casting a vote.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 9943 was prepared by Technical Committee ISO/TC 8, Ships and marine technology, Subcommittee

SC 3, Piping and machinery.

This second edition cancels and replaces the first edition (ISO 9943:1991), which has been technically revised.

iv © ISO 2009 – All rights reserved
---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 9943:2009(E)
Shipbuilding — Ventilation and air-treatment of galleys
and pantries with cooking appliances
1 Scope

This International Standard specifies the design requirements and general considerations for the ventilation

and air-treatment of galleys and pantries with cooking appliances onboard merchant seagoing ships, when

such ventilation and air-treatment is specified by the shipowner.

It applies for normal conditions in all waters except those encountered in extremely cold or hot climates (i.e.

with a lower or higher temperature than those stated in 4.3 and 4.4).

For the purposes of this International Standard, pantries with cooking appliances, referred to above, are those

which contain appliances consuming more than the small amount of electrical power needed for coffee urns,

hot-plates for keeping food warm, electric water boilers, etc.

NOTE Users of this International Standard should note that, while observing its requirements, they should at the

same time ensure compliance with such statutory requirements, rules and regulations as may be applicable to the

individual ship concerned.
2 Normative references

The following referenced documents are indispensable for the application of this document. For dated

references, only the edition cited applies. For undated references, the latest edition of the referenced

document (including any amendments) applies.
ISO 31-4, Quantities and units — Part 4: Heat
ISO 3258, Air distribution and air diffusion — Vocabulary
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 31-4, ISO 3258 and the following

apply.
3.1
ventilation

provision of air to an enclosed space, sufficient for the needs of the occupants or process

3.2
air-treatment

use of devices to control such air properties as temperature, humidity and cleanliness

3.3
galley

enclosed space(s) containing appliances used for cooking food for the ship’s crew

© ISO 2009 – All rights reserved 1
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ISO 9943:2009(E)
3.4
pantry with cooking appliances

pantry with devices that typically produce significantly more heat load than a single coffee urn, electric

hot-plate, electric water boiler, etc.
4 Design requirements
4.1 General

A separate supply air system shall be provided for the galley; this supply air system shall take in outdoor air

only.

A separate exhaust air system shall be provided for the galley, discharging the total airflow to the atmosphere.

The system shall be designed for the conditions given in 4.3 and 4.4 and the airflow required by Clause 5.

For pantries of comparatively low heat generation, the supply air system may be connected to an air-

conditioning system serving other spaces. In such cases, approval by the appropriate authority of such

arrangements is a precondition.
4.2 Ordering information
The purchaser shall provide the manufacturer with the following:
a) a plan showing the galley with its appliances;

b) rated power, heating method, amount of release of heat and humidity, and the details of the hood (if

installed) with respect to each cooking appliance;
c) simultaneity factor for the appliances (see 5.1).
4.3 Summer conditions

The cooling power shall have the capability of cooling the supply airflow to 10 °C below an outdoor condition

of 35 °C dry bulb and 70 % relative humidity.
4.4 Winter conditions

The heating power shall have the capability of heating the supply airflow to +20 °C when the outdoor air

temperature is −20 °C dry bulb.
2 © ISO 2009 – All rights reserved
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ISO 9943:2009(E)
5 Airflow calculation
5.1 Supply airflow

The supply airflow to a galley shall be determined in accordance with the formula below.

The airflow, V (expressed in m /s), to remove the sensible heat and latent heat emitted from appliances,

shall be determined by the following formula (see also Annex C for example calculation):

L× φ
∑ qt
V =
ρ×∆
where
L is the simultaneity factor [see a)];
φ is the total heat emitted from the appliances, expressed in kW [see b)];
ρ is the density of the air, i.e. 1,2 kg/m [see c)];

∆ is the difference between the average enthalpy of the room and the supply air, expressed in kJ/kg

[see c)].

a) Simultaneity factor L means the ratio of operating and installed appliances. The factor shall not be lower

than 0,5. Where specific data are not available, the following factor may be used for calculations.

L = 1 for pantries.
L = 0,8 for galleys with up to 250 cooked meals served per day.
L = 0,7 for galleys with more than 250 cooked meals served per day.

b) Where specific data on the emitted heat are not available, the values of Table B.1 may be used for

calculation.

c) Supply air condition is changed as shown in Figure 1. Outside air (35 °C, 70 % RH) is cooled by 10 °C to

25 °C (see 4.3). Properties of supply air blown into the room change according to the incline angle of

room sensible heat factor (RSHF) and reach room conditions
...

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