District cooling system pdf

Cooling System Interface : Design and Practice. The effective utilization needs considerable attention on building side HVAC design. In the “real” district cooling system a combination of free cooling (from underground water, lake or sea), compression chillers and sorption chillers can be used to produce cold water.

Far a district cooling system to be successful, it is essential that all elements of the system are integrated and operate together without compromising performance. Central cooling plants house large, highly efficient, industrial-grade equipment that produces chilled water for supply to customer buildings through an insulated underground piping network. Working on broadly similar principles to district heating , district cooling delivers chilled water to buildings like offices and factories needing cooling.

The concept is to centralize the air conditioning system in the mega area into one plant. This paper presents the way to simulate the refrigeration plant by using the black box equipment model. Performance data of many equipment are collected such as chillers, pumps, and cooling towers.

It serves multiple buildings within a particular service area. Chilled water is delivered via an underground insulated pipeline to office, industrial and residential buildings to cool the indoor air of the buildings within a district. Centralizing the comfort cooling infrastructure offsets the need for mechanical rooms in each building within the district.

Its application was found in the Kai Tak Development (KTD) and other planned new developments in Hong Kong. Generally, the district cooling system is formed by four main subsystems: the cold production, the distribution, the heat exchangers and the utilization systems. The central power plant can be considered as the core of the system.

The ice storage system is important because, along with the centrifugal chiller, it dictates the performance and economy of the district cooling plant. Of the various methods of ice storage that have been develope the ice ball and ice- on-coil storage systems are the most frequently used. The district cooling plant is one of many concepts involved in energy management on the air conditioning system in the buildings. Almost every chilled water system is affected by the low delta-T syndrome in which the supply and return chilled water temperatures falls short of the design level, particularly at low loads.

The electrical energy required by an SDC system is only to run the pumps. Every ton of district cooling capacity installed can save one ton of CO² emissions. District energy systems, i. The development of a district cooling system is a response to the need to provide energy for the future in a manner that is consistent with the need to protect our environment. The production of cooling from a centralized facility allows for improvements in energy conservation.

Figure 2: Outline of district cooling system using free cooling from e. In all these problems the district cooling technology comes to give the solution. With the term district cooling , according to the interna-tional bibliography, the central mass production and distribution of cooling energy, is consid-ered. This project was an engineering, procurement, and construction contract that included the design, manufacture, procurement, construction, and commissioning of a high-efficiency district cooling plant that would serve as a model for South East Asia where the year-round cooling demand is high. Chilled water is centrally produced and distributed throughout the campus, and this district cooling system shall be utilized wherever possible. Some general guidelines are also outlined regarding design temperature and pressure conditions.

A DC system uses large capacity chillers with water-cooled condenser (WC) and centrifugal or screw compressors to produce cooling efficiently and save peak power and energy. GWh Annual Air Cooled System Energy Demand = 182. Air cooled Energy Demand 35.