The heat storage performance of sand is so strong, how about using it as a battery?

  Russia’s energy outage has made the energy supply of many European countries extremely tight, and Finland is one of them. Since announcing its membership in NATO, Russia has stopped sending gas and electricity to its northern neighbor.
  Under the energy crisis, Finland is now trying to use “sand energy storage” to store a batch of clean energy to cope with the next winter. The core of “sand energy storage” is to use low-purity sand as a battery. After being heat-treated with excess energy from wind and solar energy, the sand is fed into insulated silos made of concrete for storage. Sand can store heat at about 500 degrees Celsius, and when needed, through switches, the energy can be released and fed into the grid.
  In July this year, Finnish startup Polar Night Energy installed the world’s first “sand battery” in the Kankampe region of Finland to store more than 100 tons of sand for energy storage. On the one hand, this experimental device can slightly alleviate the energy anxiety in Finland, on the other hand, it explores a new green energy practice possibility. The company’s researchers say their device is capable of holding sand at 500 degrees Celsius for months.
  According to the BBC, the “sand energy storage” method used by Polar Night Energy first appeared in a pulp mill in Tampere, Finland. At the same time, the United States also published a research report on sand energy storage in August 2021.

  In late June, the founder of Bridgewater Fund, Rui Dalio, said in an online dialogue with Shen Nanpeng, the global executive partner of Sequoia, that the current global gap between the rich and the poor has reached the largest value since the “World War II”, and the concept of a big cycle is used. make an analysis.
  “The United States established most of the global order in 1945, when World War II ended. When the new global order developed, we ushered in a period of peace and prosperity. During this period, individuals and businesses became more Willing to take on debt, betting on the future. We will see debt relative to GDP growth as a natural cycle.
  “But the scale of wealth accumulation is uneven, which is one of the characteristics of the economic system, so while wealth accumulation, The gap between the rich and the poor is rising, which in turn challenges the current social order. At the same time, the power gap between other countries and the world’s leading economies has gradually narrowed after recovering and strengthening after the war. During this period, the debt gradually builds up, but the same amount of hard currency does not exist, so internal conflicts in the country can occur. This internal conflict and currency issue became a political issue, and international competition emerged.
  “When this type of international competition becomes more intense, there is an intensification of economic warfare. Economic, currency and capital sanctions are not new, they have occurred repeatedly throughout history. For example, on the eve of ‘World War II’, the US froze Japan assets, and restrict Japan’s oil imports, Japan suffered economic pain that led to its bombing of Pearl Harbor. Since there is no international tribunal to resolve the differences that result from these conflicts, economic warfare is likely to lead to a recurrence of military warfare, with the dominant power post-war The rules will be set and a new cycle begins.”
These sounds are also worth listening to

  We are seeing inflation become entrenched in the economy, and what is unusual about this particular period is that both demand and supply are affected by external events, namely the pandemic and the Russian-Ukrainian conflict. In conversations with the CEOs of the world’s largest corporations, they told me that they see persistent inflation in their supply chains. At the same time, our economists say there are signs that inflation will be lower in the second half of the year. The answer is uncertain, though, and we’ll keep an eye out.
  ——On July 18, Goldman Sachs CEO Su Dewei said on the second-quarter earnings conference call. He also expects more volatility and more uncertainty.
  Central banks are stepping up efforts to control inflation, a priority until inflation expectations are stabilized. At the moment we are still seeing inflation rising and we have to throw some cold water on it.
  ——On July 15, Georgieva, President of the International Monetary Fund (IMF), said that central banks will continue to raise interest rates until inflation shows signs of cooling, which may last until 2023. In this year’s World Economic Outlook report, the IMF cut its global growth forecast for this year and next to 3.6 percent from 4.4 percent.
  In the future, heat waves will be the norm. We could experience more severe extreme weather. I hope this situation can serve as a wake-up call for governments.
  ——On July 19, Talas, Secretary-General of the United Nations World Meteorological Organization, said in response to the rare heat wave sweeping the northern hemisphere. Taalas warned that extreme weather is becoming more common around the world, and only further curbs on global warming are expected to ease around 2060.
  The impact of high inflation on purchasing power, its constraining supply, and heightened uncertainty are having a dampening effect on the economy. Such problems not only affect Europe, but most of the world as well.
  - On July 21, the European Central Bank raised interest rates for the first time in 11 years. On the same day, European Central Bank President Christine Lagarde said that the weakness of the euro was part of the consideration for the sharp interest rate hike. Inflation will remain unwelcomely high for some time, she said.
  - On July 12, the euro-dollar exchange rate was flat for the first time in 20 years. Since then, the euro has continued to depreciate. “The Wall Street Journal” said “European economy is sinking.”

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