The check valve is used in the piping system, its main function is to prevent the backflow of the medium, prevent the pump and its driving motor from reversing, as well as the release of the medium in the container.
Check valves can also be used to feed pipes where the pressure may rise to exceed the pressure of the main system. Check valve according to the different material, can be applied to a variety of media pipeline.
The check valve is installed on the pipeline, which becomes one of the fluid components of the complete pipeline. The opening and closing process of the valve disc is affected by the transient flow state of the system in which it is located. In turn, the closing characteristics of the disc have an effect on the fluid flow state.
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20 energy-saving tips to teach you energy saving and environmental protection knowledge
Energy conservation plays a crucial role in addressing the growing environmental challenges we face today. Natural disasters such as typhoons, droughts, floods, melting glaciers, and species extinction are all linked to climate change, which is largely driven by the excessive emission of carbon dioxide from fossil fuel consumption. By adopting energy-efficient practices, we can significantly reduce our environmental footprint and contribute to a more sustainable future.
During the “Eleventh Five-Year Plan,†China set a target to reduce energy consumption per unit of GDP by 20%. This handbook provides 20 practical tips that individuals can follow to help achieve this goal. Every small action adds up, and even minor changes in daily habits can lead to substantial energy savings.
For instance, each kilowatt-hour saved equates to saving 0.4 kilograms of coal, 4 liters of clean water, and reducing emissions of 1 kilogram of carbon dioxide and 0.03 kilograms of sulfur dioxide. These numbers might seem small, but when multiplied across millions of households, they have a major impact on the environment.
Understanding these figures helps us recognize the urgency of the situation. We are dealing with an increasingly polluted environment, depleting fossil fuels, and rising living costs. However, making small, conscious efforts can make a big difference. Energy conservation not only benefits the planet but also improves our quality of life.
Here are 20 effective energy-saving tips:
**Tuen Mun 1: Use energy-saving air conditioners**
Energy-saving air conditioners provide the same cooling effect while using less power. If every household in the country used them, it could save 3.3 billion kWh annually—equivalent to building a 600,000 kW thermal power plant and reducing greenhouse gas emissions by 3.3 million tons.
**Tuen Mun 2: Adjust your air conditioner temperature**
Raising the temperature by just one degree Celsius can save 3.3 billion kWh of electricity per year. It also helps maintain better body temperature regulation and reduces the risk of catching a cold.
**Tuen Mun 3: Replace traditional bulbs with energy-saving lamps**
An 11W energy-saving lamp produces the same light as a 60W incandescent bulb while using 80% less energy. If 1.2 billion energy-saving lamps were used nationwide, it would save enough electricity to match the annual output of the Three Gorges Dam.
**Tuen Mun 4: Dim your TV screen**
Reducing screen brightness not only saves energy but also protects eye health, especially for children. With 300 million TVs in China, simply dimming the screen could save 5 billion kWh annually.
**Tuen Mun 5: Unplug devices when not in use**
Many electronics continue to consume power even when turned off. Unplugging them can save 18 billion kWh per year—enough to power three Daya Bay nuclear plants.
**Tuen Mun 6: Optimize computer settings**
Set your monitor to sleep mode after short periods of inactivity and unplug the computer when not in use. This can save at least 1 kWh per day and extend the lifespan of your equipment.
**Tuen Mun 7: Choose energy-efficient refrigerators**
Energy-saving refrigerators are more efficient, helping you save money over time. A 268L model can save around 2,000 yuan in electricity costs over its lifetime.
**Tuen Mun 8: Use your refrigerator efficiently**
Even with regular models, following simple steps like timely defrosting, minimizing door openings, and pre-thawing food in the freezer can save over 20 kWh per year.
**Tuen Mun 9: Use a microwave for cooking**
Microwaves heat food directly, resulting in faster cooking and less energy waste. They are 65% more efficient than electric stoves and 40% more efficient than gas ovens.
**Tuen Mun 10: Install dual-flush toilets**
A two-button toilet can save up to half the water compared to a single-flush model. Water conservation also reduces the energy needed for water treatment and sewage disposal.
**Tuen Mun 11: Choose energy-efficient washing machines**
High-efficiency washing machines save both water and electricity, allowing you to wash twice as much clothing with the same amount of resources.
**Tuen Mun 12: Practice daily water-saving habits**
Use water from washing your face to wash your feet or collect wastewater for flushing the toilet. Small habits add up—three people can save over 1 ton of water per month.
**Tuen Mun 13: Go paperless**
Using email and messaging apps instead of printing documents can significantly reduce paper consumption. If all offices went digital, it could save over 1 million tons of paper annually.
**Tuen Mun 14: Install energy-efficient windows and doors**
Windows and doors account for about 50% of a building’s energy loss. Insulating glass helps keep your home comfortable while reducing heating and cooling costs.
**Tuen Mun 15: Use smart heating controls**
Adjustable thermostats allow you to control indoor temperatures, saving energy when you’re away. This method can cut heating costs by 15–30% compared to traditional systems.
**Tuen Mun 16: Install solar water heaters**
Each household with a 2-square-meter solar heater can meet 70% of its hot water needs throughout the year, reducing reliance on electricity and gas.
**Tuen Mun 17: Drive smaller, fuel-efficient cars**
Smaller displacement vehicles are more fuel-efficient, produce less pollution, and are easier to park in crowded cities. They are becoming the new standard for urban mobility.
**Tuen Mun 18: Take public transport**
Using buses and subways instead of private cars can reduce traffic congestion and energy use. For the same number of passengers, buses use 1/10 the fuel and emit 1/16 the pollutants of cars.
**Tuen Mun 19: Drive efficiently**
Maintain a steady speed, avoid sudden acceleration, and keep tires properly inflated. These habits can improve fuel efficiency and reduce emissions.
**Tuen Mun 20: Ride a bicycle**
Bicycles are eco-friendly, cost-effective, and promote physical health. If one-third of people switched to cycling, it could save 17 million tons of gasoline annually—equivalent to the output of a large oil refinery.
By making small, consistent changes, we can all play a part in protecting the planet and creating a healthier, more sustainable future.