marine engineering

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Heating,Ventilation and air conditioning for cargo ships

Air conditioning means the control of temperature and humidity in a space together with the circulation, filtering and refreshing of the air.

Air conditioning system - A typical recirculating system contains a fan to produce the airflow through the system, a cooling coil where the heat from the air is transferred to the cooling medium, and ductwork to distribute the air through duct terminals and to return the air to the cooling coil. Many recirculating systems contain heaters for use in the heating season or for use in maintaining a specific relative humidity requirement.

Air conditioning is based on the ventilation requirement for accommodation and incorporates heating with any necessary humidification and importantly, cooling with de-humidification as necessary. Comfortable conditions depend on the temperature and humidity but are also sensitive to air movement, air freshness and purity.

Summarized below some of the basic procedure of marine air conditioning system :
  1. Types of air conditioning system

  2. Air conditioning systems may be divided into two main classes the central unit type in which the air is distributed to a group of spaces through ducting, and the self-contained type, installed in the space it is to serve. .....

  3. Marine air conditioner

  4. A very significant factor affecting an air conditioning system is the rapidly changing climatic conditions. The equipment has to perform within these variations and has to meet the differing requirements of the occupied spaces of the ship......

  5. Air conditioning central unit

  6. The elements of a central unit are fan, filter, cooler, heaters and plenum chamber. Normally these are all housed within a single casing, with the possible exception of the fan. It is possible to carry this further by including the refrigerating plant in a single assembly thus providing a complete package. ....

  7. Air conditioning air terminals

  8. The best designed air conditioning system is only as good as the means of delivering the air to the spaces. The main function of the air terminal is to distribute the air uniformly throughout the spaces without draughts......

  9. Heating and cooling loads and air quantities

  10. Outside air must be introduced to all living spaces, although the amount of fresh air necessary to sustain life is very small indeed. Space conditions can vary greatly in a short time. They are governed by factors such as body odours and smoking, which may require a fresh air supply of 12 litre/s per person or more. ...

  11. Air conditioning unit typical specification

  12. To prevent excessive leakage of conditioned air, all doors leading from the conditioned spaces to the outside atmosphere, machinery casing, etc., should be of the self-closing type and reasonably airtight......

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General Cargo provide information on cargo ships various machinery systems -handling procedures, on board safety measures and some basic knowledge of cargo ships that might be useful for people working on board and those who working in the terminal. For any remarks please Contact us

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