Electronically controlled heater

Infinitely electronically controlled instantaneous water heater with
21 kilowatts peak power.
TW = leaving the taps
TWW = inlet control valve with
L1/L2/L3/PE = Electric Connection
1) heater
2) Pressure Switch
3) the central retaining screw
L2 of the upper clamp connection (second from left) is already
scorched and melted on the corresponding vein isolation. The device is
not reliable.

For electronic instantaneous water heaters can select the water
temperature at the device. To the mixture of cold water is not
necessary. But even if a mixing valve is used, even a thermostatically
controlled, subject to true electronically controlled water heater is
no longer the limitations of the hydraulic water heater, the heater is
specifically required for proper thermostatic mixing valves.

Benefits are increased comfort and a slightly better efficiency, which
enables energy savings of up to 20% compared to hydraulic
instantaneous water heaters, as well as small amounts of water are
heated only as far as necessary. The warming is largely variable.

The water is usually heated by a heater element in which the filaments
are washed directly from the water. Tap water is usually a good
insulator, so that up to a certain, obvious to the device conductance
no significant fault currents. The bare wire heating elements are
compared with the previously used indirectly heated tube radiators in
addition to the higher efficiency also has the advantage of a much
shorter reaction and thus heating. A disadvantage is the higher
susceptibility to air bubbles and steam bubbles, which can lead to
partial overheating of the heating wires.

Fully electronic water heater, the outlet temperature even above the
performance limit held constant by reducing engine via an
electronically controlled valve, the flow rate to the extent that the
set desired temperature is reached. The world's first fully electronic
water heater in 1987 developed and patented by Stiebel Eltron.

There are also known as "electronic" heater advertised performance
without expensive electronics that have only an electronically
controlled engine valve. By controlling the flow rate can be kept
constant with the temperature limitations, therefore have similar
restrictions on such devices as the hydraulically controlled
instantaneous water heater.

"Great opportunities for more solar energy"

In three months of construction, built in Brandenburg, the largest current photovoltaic plant in Germany. The company Göppinger Speidel provides the electrical systems. Andreas Wolff NWZ-conversation.

Mr. Wolff, you are involved in building the largest photovoltaic plant in Germany. Given this summer - because you can actually think seriously about the use of solar energy at our latitude?

ANDREAS WOLFF: We consider the issue of renewable energies is not as seasonal products and are committed already since the year 2004 in this area. The owners of facilities must consider the entire period under the Renewable Energy Act, EEG. Moreover, the spring was great. There are, as far as the income stream, a normal year.

You are responsible for the entire electrical equipment plant in Brandenburg. Engage only in large plants?

WOLFF: We specialize in the field of photovoltaics in 2004 on large-scale plants in the megawatt range, and here were among the first in the county, perhaps even nationwide. Similarly, we build but also for the classic customer complete rooftop systems from three kilowatts. Thus, the private client benefits from the insights gained from the large-scale plant.

To what degree have you been equipped facilities?

WOLFF: We have already distributed a total of 400 megawatts to over 100 major installations and successfully connected to the mains.

How much does this now by investing in a circle Oberspreewald / Lausitz?

WOLFF: The plant in Meuro on an area of ​​150 acres will provide 70 megawatts, in time, 52 tons of CO2 per year.

How many households can thus be supplied with electricity?

WOLFF: The plant will provide electricity for 17 500 households.

See further potential for the use of solar energy, especially in Baden-Württemberg?

WOLFF: Absolutely. What has shifted in recent months after the nuclear disaster in Japan in the federal policy helps ensure that developing alternative solar energy even further. Especially in Baden-Württemberg, we see great opportunities for additional investments by the change of government in the spring. Therefore we want to focus on this market, although we will continue to remain active in other European countries.

During the construction of the plants, but they are not general contractors, but focus on the electronics.

WOLFF: Right. Our performance in the electricity, which covers part of the current example, cabling and the connection of more than 300 000 PV modules, inverters 2555, 650 pieces AC / DC sub-distributors and 141 medium-voltage transformers. Further equipping the entire medium-voltage switchgear, distribution equipment for the AC and DC voltage, but also building the entire communications and information technology is in our scope of services and for the successful operation of such facilities is necessary. The distribution systems are manufactured with our own staff here in the house. In these businesses, we build the number of employees from stable.

How many employees do you employ?

WOLFF: We have been employed continuously for over ten years, 280 employees, spread over our head office in Göppingen and our offices in Berlin, Leipzig, Ludwigsburg.

In which areas?

WOLFF: We offer a complete range of electrical and communication technology and see us here as a total service provider. Whether business or pleasure, we equip the house from classic to office complex or industrial plant building. The occupation of the necessary core competencies is well trained and flexible staff, particularly for the areas of renewable energy is a very central issue. Other areas of responsibility, such as the rent construction of wind and biogas plants provide, in addition to the use of solar energy has good prospects for our employees.

They stressed that you keep your employee base constant. Do you also like?

WOLFF: We are involved heavily in the training. We currently employ 40 trainees and have completed all currently an educational partnership with the Albert Schweitzer School in Göppingen to establish important contacts in advance and to set the course.

More solar energy in the Czech Republic

Czech President Klaus on Friday had a "positive" news for claims to the Austrian public: "We have now moved on solar energy." Czech Republic will therefore in future less need for "dangerous" energy sources have, Klaus said after a meeting with President Fischer and Lower Austria's Governor Pröll in Geras.

Fischer stressed that "confess rules" Austria and the Czech Republic to that every country has its own energy policy and decide is responsible for it, but at the same time take care of the concerns and arguments of the neighborhood. Klaus confirmed this. He added: "We believe in global warming." Therefore, future not so much energy for heating, the Czech president, who is known for his skepticism about measures to mitigate climate change.

He was also skeptical about the time perspectives of the planned expansion of the North Highway (A5), which will link Vienna with Brno. "Whether I have the experience," asked Klaus. Governor Pröll said: "With a little faith in God (...) I am hopeful that we can use three of the northern motorway yet.

Pröll said that it had been fixed now, both on the Czech and Austrian side on the final routing. "We expect that 2013, 2014 direction can be started with the construction of border."

Transport issues are, according to Governor Pröll a focus of cross-border cooperation. The second is a flood early warning from the March. Fischer and Klaus praised the bilateral relationship as "very constructive" and "very positive".

Solar energy systems for roofs in Germany

Munich. Solar energy is a topic that has in recent years in Germany increased more and more important.



Solar energy is a topic that has in recent years in Germany increased more and more important. The decision whether to install solar panels on the roofs of busy homeowners in Germany, therefore increasing. Since solar energy system solar system but is not the same, the different types of energy are defined first donation.

In solar thermal systems passes through a liquid substance to a medium. Thus, the liquid is heated by sunlight. This type of solar heating systems is often used for water heating in homes.

In contrast, it is in thermal solar power plants to significantly larger plants that generate electricity usually in larger quantities.

In photovoltaic systems, solar energy generated DC, as a result of using an inverter in the regional electricity circuit is passed.

Most homeowners are not aware of these distinctions, however. Rather, decides on the basis of use objective, what kind of solar system installed on the roof. Nevertheless, here, as are also other purchases, the price comparison first. Solar thermal systems are already available quite cheap. When the other two described types of solar systems has mostly counted with significantly higher costs. Interested parties should, however, the purchase of solar panels not only think of the costs. Rather, households with solar energy to make an important contribution to environmental protection.

Installation of solar systems
For the installation of solar panels on the roof, a local specialist will be contacted. Many roofing companies in Germany have already specialized in the installation of solar systems. The expert should first check the roof on his fitness and then connect a comprehensive advice to the customer. The installation is also on the professional, as has this right only on the equipment for anchoring and connections of the system. DIY and hobby tinkerers is strongly recommended that you try to to the mounting of solar systems.

Pitfalls in solar energy

photovoltaic systems are not covered by homeowners insurance automatically

Bergisch Gladbach - More and more households produce their own electricity or supplement their existing heating system with a photovoltaic system on the roof. The share of photovoltaic installations grew in German households in recent years by more than 60 percent. What is the environmental aspects of a positive development may, in case of damage occasioned by the risks in property insurance for homeowners angry: Then that is when the insurance does not cover the costly photovoltaic solar panels on the roof.

"Miss many residential buildings insured to obtain information, what protection to the existing policy is an actual and know, therefore, that the energetic masterpieces are not automatically covered," shows the professional practice of Jens Grönke, Expert and Managing Director of Regudat Ltd. "In this context information then only a few homeowners insurance on their buildings to upgrade to the roof, "he added. In a smaller storm damage to the plant can get quickly to the insured a few thousand euro for repair. In addition, the entire building is underinsured, as the new acquisition of a photovoltaic solar renewable energy system increases the overall value of the building significantly. this is not recalculated and confirmations, insurance, insurance value, the causes of this increased under-insurance. The sum insured for the building is located below the currently valid insurance value and needs to be adapted.

Shall recommend the expert to examine as soon as possible to provide the protection offered by current policy of homeowners insurance and, if necessary, to extend this 'danger' photovoltaic system. "In case of doubt should be anticipated, the broker, insurance agent or pull in doubt, the insurance company to rate themselves," said Jens Grönke. This can incidentally also be aware of whether, for example, operator error, sabotage or damage are also covered in the induction system. "Of course our office is also available for questions. As an insurance bureau is among other things our goal to educate about insurance stumbling blocks in building and maintaining insurance against financial loss, informed Grönke.

expansion of solar energy will be accelerated

Dusseldorf - E. ON to expand its solar activities and will continue to make solar energy as the second pillar in the field of renewable energies. Within the next three years would make E. ON in his own words photovoltaic and solar thermal power plants for commercial production. The company enjoys in the photovoltaic sector already has a well equipped project pipeline of 300 MW in France and Italy. In Spain, E. ON to build two solar Abengoa Solar thermal power plants with a total capacity of 100 megawatts, the company said.

The Germans are nuclear critics

Old gate. The running times of nuclear power plants extend and promote the expansion of renewable energies - both holding EU Commissioner Günther Oettinger for "reasonable and necessary" as the "Forum Altensteig" erklärte.Eine hour to put the former Prime Minister of Baden-Wuerttemberg and current EU Commissioner of the questions Frank Krause. Had gathered along with representatives of politics and leaders from industry, trade and commerce.

Mayor Gerhard Feeß not only took over the greeting born in 1953 in Ditzingen politician, he practiced criticism "on the zigzag course of the Federal Government" in terms of energy. Old trail had assured that the terms of the nuclear power plants are not renewed, and had then made investments in the millions.

wanted to-day politics Oettinger not comment directly, but the European coverage described with power. 14 of the 27 EU countries relied on nuclear power. "But it applies to France 80 percent of its needs." Sweden had made his exit to reverse. And the Chinese would build just 25 units. This should not be disregarded in the assessment. "But in no other country in the world, the heart swings as high as in Germany."

According to the Commissioner of the energy demand increases over the next decades, "dramatic". dine The goal by 2030 about 20 percent of electricity consumption from renewable sources (wind, solar power, hydro, biomass, geothermal), Oettinger has to be realistic. At the same time will result shows that one in the foreseeable future could do without nuclear power. The final disposal of nuclear waste should not be moved abroad, "not to Siberia."

Because the wind farm in Simmersfeld the earnings, according to the operator failed to meet expectations, the question arises whether a gap between desire and reality. The 57-year-old is convinced that the plants would no longer supported so strongly. His motto is: "Wind in the north, the sun in the south." When Germany is heavily dependent on gas from the delivery of third countries. "We are thus vulnerable to blackmail?" Oettinger denies this "Russia wants to sell, to build new roads, as is the dependence of each other."

Although the Germans knew very well informed what a liter of gasoline costs, but not how much they must pay for the kilowatt hour of electricity, can not understand Oettinger. "For me the washing machine is turned on, not when the price is very high, at midnight, when I go to bed."

Finished, the hour-long interview with personal questions to the Commissioner. No, the activities in Brussels, had not originally been on his career plan, but now he feels very comfortable. After Altensteig he would like to come "because my brother is gone to St. Christopher's School, also had his parents had an apartment in masters.