The value and quantification of circulating cooling water treatment
1. Automatic monitoring and dosing equipment;
2. Medicinal solutions for water replenishment characteristics;
3. Services In daily operation and maintenance, in addition to paying attention to the water system and the solution itself, we should pay more attention to the economic benefits brought by the water treatment solution. That is, what value is brought by controlling the scaling, corrosion, microorganisms and sedimentation problems of the water system, and pay attention to the overall operating cost of the water system.
Usually, a targeted water treatment solution can bring the following value enhancement.
Equipment such as refrigerators and air compressors use electricity to drive compressors to work to meet the needs of the process, and are major power consumers in factories. Improving the scaling and microbial problems of cooling water can greatly improve the heat exchange efficiency of the heat exchanger, thereby reducing the work of the compressor, which means saving electricity consumption. The most direct method is to track and compare the power consumption before and after the implementation of the water treatment plan under similar operating time and load conditions, so as to calculate the saved electricity cost.
Economic benefits of power consumption saving USD/yr=Annual power consumption saving KWh/yr×unit price of electricity USD/KWh
For refrigerators, you can also compare and calculate the energy efficiency ratio (COP) of its operation to calculate the expected power consumption savings.
2. Save water consumption
It should be noted that for specific water replenishment conditions, the cooling water system has its appropriate operating concentration ratio, and it cannot blindly increase the concentration ratio in pursuit of water saving.
3. Reduce equipment downtime
The water treatment solution reduces scaling, corrosion, microorganisms and deposition problems, maintains the cleanliness of the heat exchanger pipe surface, greatly extends the continuous working time of the heat exchange equipment, and improves production efficiency. This part of the benefit can be quantified by the following formula:
Reduced downtime economic benefit USD/yr = (original annual equipment downtime hrs-current annual equipment downtime hrs) × unit time output value USD/hr
4. Extended equipment life
The water treatment solution can significantly extend the service life of the water system pipes and heat exchanger equipment by slowing down the corrosion, thus protecting the customer's assets. Through the corrosion rate coupon test, the metal corrosion rate of the pipes and equipment can be calculated, thereby estimating the service life of the pipes and equipment.
The economic benefits of improving the corrosion rate can be quantified by the following formula: Corrosion Improvement Economic Benefit/yr = C÷T0－C÷(CR0×T0÷CR)
5. Reduce the frequency of cleaning heat exchange equipment
The scaling, microorganisms and sedimentation problems in the cooling water system greatly reduce the heat exchange efficiency of the heat exchanger and easily cause the heat exchange pipeline to be blocked. The factory has to clean the heat exchanger to restore the working condition of the heat exchanger. By controlling the above problems, the cooling water solution can extend the cleaning cycle of the heat exchanger and reduce the cleaning frequency. The benefits are quantified as follows: Reduced cleaning economic benefits USD/yr = Reduced number of cleaning times/yr × Single cleaning cost USD/time
6. Benefits of system process improvement
Through a deep understanding of the customer's water system and professional knowledge, we propose improvement measures for the factory's water use, reuse, and process flow. The benefits brought are often far greater than the benefits brought by the water treatment solution. This is the greatest value of professional services, which is quantified by the benefits of specific transformation projects.
7. Save labor time
This part of the benefit is usually brought by highly intelligent dosing equipment and leading pharmaceutical technology (such as solid pharmaceuticals, safer pharmaceutical ingredients, etc.). The benefit calculation is as follows:
Work time saving benefit USD/yr=man-hours saved hrs/yr×man-hour cost USD/hr
Combining the above calculations, we can derive the ROI (return on investment) of the circulating cooling water solution to evaluate the total benefit of the solution.
ROI=(increased economic benefits RMB/yr-increased expenses USD/yr)/increased expenses USD/yr×100%
Rather than paying attention to the cost of the water treatment solution itself, we should pay more attention to the ROI of the solution, which is an indicator that better reflects the value of the solution.
Glossary:
C—Total investment in pipeline equipment, USD
T0—Benchmark service life, yrs
CR0—Benchmark corrosion rate, mm/yr
CR—Operational corrosion rate, mm/yr
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