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HomeIndustry InformationWhat is 10 tips of Cleanroom market?

What is 10 tips of Cleanroom market?

2019-11-21

There are plenty of energy-saving places in the clean room, such as heating, ventilation and air conditioning (HVAC), process cooling, compressed air, and some other facilities. Efficient use of the clean room's original energy, mining waste energy can increase profits more than selling products. Especially when building a new clean room, energy saving measures can save capital and construction time. Although preliminary design quotations are expensive, the possibility of economic refurbishment still exists.

Here are ten tips for new and existing plants to provide energy efficiency, providing reliable technology, minimal risk, low cost or no cost, and an attractive payback period.

First, low section wind speed design

The cross-section wind speed is the speed at which air in the air treatment component passes through the filter or the heating/cooling coil. The Low Profile Wind Speed (LFV) design uses a larger air handler and a smaller fan to reduce air flow, reduce energy consumption and equipment life costs.

Most engineers designed the air handler to be 500 inches per minute based on "experience." This design saves time but increases operating costs. In low profile wind speed (LFV) designs, larger air handlers and smaller fans are used to reduce air flow rates, reduce energy consumption and set life costs.

Second, the number of air changes

The clean room maintains a constant air flow to maintain cleanliness and particle count. The flow rate is determined by the number of air changes per hour, which also determines the size of the fan, the building configuration and the energy consumption. Under the premise of maintaining cleanliness, the reduction in air flow rate can reduce construction and energy costs. A 20% reduction in the number of air changes can reduce the size of the fan by 50%. Air cleanliness is more important than energy savings, but new research results have documented the need to reduce cleanliness costs.

Third, motor efficiency

The motor consumes most of the power in the clean room. A continuously operating motor consumes a lot of electricity every month. Properly improving efficiency and properly adjusting the size, after refurbishment, the economic effect is mostly good. When efficiency increases by a few percentage points, profits can increase. Using a high-quality and efficient motor does not necessarily cost too much. High efficiency means minimal, and the load is minimized before changing the size of the motor. When the output changes, the variable speed drive (VSD) can improve the operating efficiency.

Four, variable speed drive freezer

The variable speed drive freezer saves a lot of energy and money. Many cleanroom designers and operators believe that it is not necessary to use a variable speed drive freezer because the load is usually constant and the multistage freezer unit is typically controlled to operate at high loads. However, a refrigerator with a constant load usually operates below full load. Variable speed drive chillers typically operate at 90%-95% of full load to save energy.

Five, double temperature refrigeration cycle

Freezing systems are usually designed to withstand the maximum load, regardless of whether the maximum load occurs frequently. The chilled water temperature in the refrigeration cycle in the process is determined by the extreme heat load of only a small fraction of all loads, which is just one or two of many cases. This can result in excess refrigeration capacity and inefficiency in the event of insufficient load. When the temperature of the supplied chilled water is low, the operating efficiency of the freezer is also low. On average, the chiller efficiency increases by more than one percentage point for each additional 1/2 degree Fahrenheit supply temperature. If the load is divided and two different temperatures of chilled water are provided, the work efficiency will be higher.

Sixth, cooling tower optimization

High efficiency cooling towers increase the efficiency of the freezer by reducing the supply temperature of the condensate. All cooling towers should work in parallel and evaporate cold with increased surface area for better results.

For every ton of chilled water that is exported from a freezer, a typical cooling tower requires 100 watts of energy. Up to ten times higher efficiency, for example, closer to inlet and outlet temperature differences, more efficient airflow design, high quality and efficient fan with variable speed drive motor, reduced height to limit pump head and increased fill area (select large size Tower) and so on.

Seven, free cooling

Cooling with outside air is economical and widely used in commercial buildings. Another "free cooling" solution is available for systems that require constant chilled water and fan coils, such as clean rooms.

Free cooling technology directly uses chilled water in a cooling tower in a low temperature or low humidity environment to reduce or replace the use of a freezer. Depending on the weather, the use of a free cooling system can reduce the energy consumption of the cooling system to one tenth (from 0.5 kW / ton to 0.05 kW / ton).

Eight, heat recovery

Many mission plants consume a lot of energy to heat, while consuming more energy to remove "waste" heat from the process, but not combining the two processes. The recovered heat can be used to preheat fresh air, reheat the air, and other uses. The AHU preheating coil can preheat the outside air with wastewater (pre-cooled in hot weather).

The reheat coil can recover waste heat from the air compressor or the condenser backwater of the freezer, while saving the freezer energy and boiler fuel. Heat exchangers allow for the exchange of heat between different media that cannot be mixed or in direct contact.

Nine, lead pump

In the past, equipment equipped with variable frequency drives often failed and the control was complicated, so many engineers and managers were reluctant to use variable frequency drives. Reliability is more important than energy saving, while old variable frequency drives are less reliable. In the last decade, the reliability of the variable frequency drive has increased and the price has decreased. Many key systems are now using variable frequency drives.

We believe that the use of variable frequency drives in many systems and pumps of all types in Cleanrooms is safe and cost effective. In fact, it can be shown that considering the investment recovery rate without using the variable frequency drive is irresponsible because the investment payback period is less than one year.

Ten, centrifugal compressor

Improvements in air compressors have saved a lot of energy. Centrifugal compressors are oil-free and much more efficient than screw compressors. However, centrifugal compressors cannot be idling, which makes them inefficient at low loads. The most efficient and economical method is the combination of both centrifugal and screw compressors. The centrifugal unit is selected to meet the basic load, and the smaller screw unit is used to satisfy the peak load. The compressor unit should be equipped with a heat recovery system

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