Cooling systems, high capacity

The processes in a cooling system of electronic devices with high power density can be modeled as follows. The coolant with temperature T2.0 and pressure F2.0 enters into the micro-channel from the tank (5) (Fig. 10.2). The mass capacity of the liquid in the tank (5) is large enough, therefore the heat flux from the micro-channel... 

L High 1. High water supply temperature 1. Cooling system capacity 1. Install high flow alarm and/or JW 1/93 ... 

Electrophoresis apparatus It may have a built-in cooling system, but this is not essential if cold buffer (4-8°C) is used, except when very high voltage is applied (>15 V/cm in the gel for more than 1 h). The buffer vessels should have a volume of 1 L or more to ensure a sufHcient capacity of the buffer system (se Note 2). 

For multilamp photo reactors to handle large capacity, about 200-500 lamps can be replaced by one 30 kW medium-pressure high-intensity lamp at the same operating cost, but with much lower volume. However, systems with medium-pressure lamps require an efficient cooling system to maintain the desired reactor temperature. For UV/ozone AOP, ozone dissolution is enhanced by efficient design of the diffusers to improve the mass transfer. 

These tanks, each with a capacity of about 150 m , are constructed of stainless steel to very high standards and are contained in concrete cells. The tanks are fitted with water-cooling coils and a water jacket to remove radioactive decay heat, and a cooling tower system is used to reject this heat to the atmosphere. In order to ensure the high reliability required, diversity, segregation, and redundancy are used in the cooling system, both external and internal to the tank. The insides of the concrete cells that house the tanks are lined with stainless steel to act as a third line of containment. 

Laboratory testing showed that although the reaction between A and B was rapid at 70°C, accumulation of unreacted material would occur if the temperature was allowed to drop below 40°C. The reaction was highly exothermic with an adiabatic temperature rise of >100°C. The rate of heat output at the proposed addition rate was within the heat removal capacity of the cooling system. 

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