The data center power consumption more than a year the dam capacity, it's time to consider energy storage type data center "is published, some industry experts are given guidance, put forward the major problems, also have a lot of industry colleagues, thank you very much for my attention, also is the typical problems which you proposed, to give its reply, for your reference!
Q: Does the low peak-to-valley price difference or low load rate in data centers affect energy storage revenue?
A: As for the load rate and electricity price difference of data centers, the situation of each data center varies from place to place and needs to be analyzed according to the situation of users. There are no standard solutions for energy storage, only customized solutions. According to the current power price policy, it is of economic value to do energy storage in data centers with large peak-valley price difference and high load ratio (representing stable electricity consumption). Of course, the author has also been thinking of new energy power generation and energy storage type data center combined with technology and business models, has yet to have a very clear idea after clear report with all of you again, also expect to exchange ideas with you, together to explore data center power increase the level of "green" way.
Q: The data center may not have enough space for batteries, and what about the limited load-bearing floor?
Answer: As for the site, if the horizontal expansion can not be extended, we can try to expand it vertically. In addition, lead-carbon battery is only one kind of electrochemical energy storage technology. It is not limited, but can be applied as long as it can meet the requirements of safety and economy. As for the load-bearing problem, the battery room of the new data center can be considered as a whole on the first floor. For the reconstructed data center, a detailed plan should be re-evaluated.
3 Q: Does the increase in the UPS charging power affect the number of cabinets that the UPS can support?
A: In terms of hardware, you only need to increase the power of the rectifier module, but do not need to change the inverter module. Therefore, the number of cabinets that can be supported by the UPS is not affected.
4 Q: Does it increase security risks?
A: Theoretically speaking, there is no absolute safety, only relative safety, but this has little to do with whether the data center does energy storage, even if the data center does not do energy storage, safety risks also exist, just say that when making plans, we should try to consider the safety.
Q: Can the data center meet the requirements of high precision management when it is doing economic generating points such as demand side response?
Answer: About fine management, it needs a powerful energy management system (EMS). The energy management system should realize the collection and analysis of data, and at the same time mine the potential value of data, so that problems can be visible, predictable and manageable. At present, the function of energy management system of some manufacturers in the market has been very intelligent and can meet the requirements, so at this time node, the technical problems of energy management system will not bring great impact on business promotion.
6 Q: What should I do with the battery?
A: The battery can be recycled according to the market price of lead recovery, after smelting, green recycling; Recovery residual value is introduced in the economic calculation section of the paper. Here also to correct the misunderstanding of environmental protection of lead-acid battery manufacturing, as long as the production link, recycling link, re smelting link environmental protection meet the requirements, 98% of the materials of lead-acid battery can be recycled, when the formation of production to recycling to reproduction of the industrial loop, lead-acid battery is environmental protection products.
7 Q: The data center load does not change from one day to the next. Do you need to expand power capacity when adding UPS for energy storage? Where does the expansion cost go?
A: 2 n structure commonly used data center power supply, transformer load is usually below 50%, because of long charging time charging ratio is small, and the charge is more, at the off-peak period decreased, normal load server this time period due to the click rate is reduced, its power consumption will also drop, so affect the pressure of the transformer is very limited. In the course of operation, if it is found that capacity costs have been increased, such costs can be deducted from the economic income. Economic analysis has many boundary conditions, so it needs to be calculated according to specific projects. However, as a whole, data center energy storage is a very valuable market segment in the current energy storage market.
Q: The battery is evenly charged and deeply discharged. Has the cycle life been considered? At present, which brand of battery on the market can reach 5 years, but also consider the site, bearing capacity, battery charge and discharge temperature rise, the environment, supporting air conditioning and other small details.
A: Ordinary lead-acid batteries are not suitable for energy-storage data centers due to their poor cycle performance. Lead-carbon batteries have better cycle performance than ordinary lead-acid batteries. This provides technical prerequisites for building energy-storage data centers, as detailed in the author's article. In the process of using lead-carbon battery, the temperature rise is very small due to the low charging and discharging rate and the good thermal conductivity of carbon, and the conventional cooling mode and capacity of data center can meet the requirements.
Q: Can I buy commercial insurance for storage batteries?
Answer: In order to avoid risks, safety insurance can be purchased, but there is no electricity generation insurance similar to pv at present. The author has also discussed the possibility of introducing more detailed insurance with many insurance brokers, but there is no conclusion.
Q: Why not use echelon lithium batteries?
A: Data center is a place with very high requirements for power supply safety (including power failure and fire). With the current technical status, the capacity and safety of step lithium batteries are unpredictable. Therefore, the author holds a conservative attitude towards using retired lithium batteries for energy storage.
