Green technologies, renewable energy, environmental protection, technology reviews

Tuesday, February 16, 2016

Cái kết phút 89 của kẻ cạy cửa_2

Thursday, February 26, 2015

Financial And Environmental Benefits Of Solar Home Systems

Many people have already realized the benefits of solar energy and solar systems. Solar systems have a positive impact on the preservation of the environment and significantly reduce electricity costs. Here’s a list of all the financial and environmental benefits of solar home systems for domestic use.

The financial benefits of solar systems

The amount of energy savings by using a solar system depends on: place of residence, house size, number of sunny days during the year, type of system, type of system, and so on. Installation and maintenance of these systems require an average of 10,000 to 20,000 dollars for household needs. For those who can’t afford this amount of money, there are solar systems that can be obtained through leasing. Leasing a solar home system allows homeowners to install all the necessary equipment for solar heating with only a small amount of money.

This is the simplest description of the principles on which the solar home system works.

According to a study in the United States (from 2011), an average twenty-year savings by using solar systems can be over 25 000 dollars. The studies were conducted in the following countries: California – $34.260, New York – $31,166, Florida – $33,284, Texas – $20,960, Hawaii – $64,769. Also noteworthy is the fact that the average American household uses about 900 kWh per month. Of course, for other continents apply different data about these savings.

According to the experiences of some countries in Southeast Europe, the data are a bit different. The average electricity consumption of a four-member household is about 450kW/ h per month. Well placed solar panels (with total panel surface about 130 square meters) can save up to half of the annual costs for the electricity bill.

Since 2000, the annual energy costs in the United States have risen an average of 3.75%. One typical American family spends about 150 dollars each month for electricity. It is approximately two thousand dollars per year. The price of electricity is constantly growing, and household needs for this energy are higher than in previous years.

Here is another one interesting study about solar home savings, by the Lawrence Berkley National Laboratory.

Adding a solar home system increases a household’s resale value about $ 50 per watt
A 3.1kW system can add 17,000 dollars to your home’s value
Houses with solar system sell faster (about 15 %) than homes without them

Environmental benefits of solar home systems

From the standpoint of energy, solar energy is a huge energy source that can meet human needs for a very long time. The solar energy that reaches the Earth’s surface during only 6 hours is enough to satisfy the annual world energy needs. Recommended reading: Frequently Asked Questions About Solar Homes.

Ecologically speaking, it is pure energy whose energy technologies do not pollute the environment. Solar energy is transformed directly into thermal or electrical energy, enabling fast implementation in all energy processes.

Modern solar systems enable the utilization of solar energy throughout the year. They do not emit carbon dioxide (and other harmful gases) and don’t pollute our environment. In contrast, fossil fuels are becoming more expensive, and their reserves decreased. So it’s not surprising that more and more people are opting for solar home systems.

Solar Smartphone

The life of modern man has become unthinkable without a mobile phone. Only a few years ago, we marveled touch screen phones. However, mobile phone technology has progressed in recent years, and one of the latest innovations is solar smartphone. Like other solar devices, this phone uses free solar energy for its work and saves electricity.

There are four basic ways to charge your mobile phone:

Classic mobile batteries that are powered by the typical electric charger
A conventional mobile phones with batteries powered by external solar chargers
Solar mobile phones with built-in solar panel (cells) for solar energy absorption
The combined method of charging – the mobile phone can be charged by electricity and a built-in solar panel (or by some solar charger)

Many well-known mobile phone companies are interested in the production and development of these cell phones. So, it is very likely that almost all of us will have solar mobile phone very soon. In the text below, you can read about the solar smartphone technology and find out some models of these cell phones.

Samsung E1107 is the world’s first solar cell phone. It is also known as “Solar Guru” or “Crest Solar”. The Samsung E1107 was first released in India (July 10, 2009). It is a two-tier GSM device that can be recharged wherever the sun shines. On the phone back side is a built-in solar panel. Crest solar is equipped with many additional features including FM radio, MP3 ringtones, flashlight, video games, etc.

Another well-known Samsung solar smartphone model is Samsung Blue Earth (also known as Samsung GT-S7550 or Samsung S7550). It is a touch screen phone with a solar panel on its back. “Blue Earth” is made of recycled plastic, and its weight is 119 grams. Also, it can use some conventional rechargeable battery.

Samsung Blue Earth is one of the solar smartphones

The “Charg” is the first solar mobile phone made in China. This is a cell phone model with a built-in modern system for the use of solar energy. The solar panel is mounted on the front of the phone. Only 60 minutes of charging in direct sunlight, provides a telephone conversation up to 40 minutes. Phone charging is also possible on a cloudy day. Even the light that is emitted from an ordinary candle can charge this phone. Solar smartphone “Charg” has all the features and options as well as all other mobile phones. Its weight is 140 grams. In China, mobile phone chargers spend about 400 million kilowatt-hours of electricity per year.

Alcatel has demoed a cell phone with the built-in solar panel on its screen. However, the main problem of this Alcatel solar smartphone is short battery life. Therefore, experts from this company are still working on improving the efficiency of solar panel.

“Juse nano battery” charger for solar smartphone is one of the newest devices in the world of mobile phones. It absorbs solar energy, then stores solar power in special nano battery and charges phone. Built-in solar cells are twice as efficient as the external mobile chargers. Solar cells can also work in low light, and the battery is connected to a power system. This device is actually some kind of cases for mobile phones. The design is beautiful, and some phones (like Galaxy S5, Galaxy Note 4, iPhone 6, iPhone 5S, and so on) are already using this supplement.

Wednesday, February 25, 2015

Useful Tips For Buying Solar Products

Solar technologies are very advanced in the last ten years, and many households are already installed solar heating systems in their house (recommended reading: Useful Tips For Those Who Want To Put Solar Heating). We’re also seeing increasing use of various products and devices that work with solar energy. If you want to buy solar panels (or buy solar products), this is a good article that will give you some useful tips. Don’t rush to purchase, read this text first!

Before you buy solar products, check the prices in all companies available to you.

Purchase of solar panels

Before you buy solar panels, it is necessary to know how they need to be large. What surface of the solar panel is adequate for your house? The system size depends mostly on the surface of the roof that is not exposed to sunlight. The rule is as follows: for every 100 square meters of “optimal part” of the roof can be installed panel of 1,000 watts (1 kW). Here are three examples:

A simple roof with two surfaces, which are facing east and west. Available roof surface for the installation of solar panels is 65 square meters on both sides. It corresponds to the total power of the solar panels of 0.7 kW.
The roof is flat and quite spacious, but his one side is in the shade of the tree, and on the other side there is a chimney that prevents the installation of the panels. So, total available roof surface for the installation is about 74 square meters, which corresponds to the power of the solar panels of 0.8 kW.
The roof is very large, but the attic windows divide him into small areas of irregular shape. The available roof surface is about 80 square meters (power of panels is about 0.85 KW).

The next important thing when you decide to buy solar panels is their price. The price depends on many factors: the size of the panels, their type and quality, the state of your life, and the like. These are some of the current prices of solar collectors in different countries:

India (New Delhi): total watts 6,250 – cost per solar panel $ 195 – total cost $ 4,875
S.: Brand “Solar Fennel”-total watts 6,900 – cost per solar panel $ 228 – total cost $ 5,472
S.: Brand “Solar Fennel”-total watts 6,555 – cost per solar panel $ 240 – total cost $ 5,506
China: total watts 6,000 – cost per watt $ 83 – total cost $ 4,992
Germany: total watts 8,400 – cost per watt $ 15 – total cost $ 9,620

What buyers need to know about marketing tricks when they buy solar products?

Before buying you should pay attention to the various tricks that are used in marketing. Here are some more helpful tips:

Beware of sellers who talk fast – If the seller avoids some of your questions or his answers are not clear enough, perhaps it’s better to find another solar company.
High pressure tactics – Many companies use terms like “hurry before solar products run out”, and so on. Avoid any marketing pressures!
Ignore any simple solar efficiency solutions to reduce cost.
Don’t buy low quality solar components!
Before you buy solar products, check the prices in all companies available to you.

Home page: https://greentechbox.com

Source: https://greentechbox.com/675/tips-to-buy-solar-products.html