A geothermal energy  cooling / heating system is based on using the full potential of the constant temperature and thermal conductivity of the earths substructure.

We can see this phenomenon in basement areas where during the summer the area is cool and during the winter warm without the use of air conditioning.

Geothermal energy can be broken down into two categories :Open loop systems and closed loop systems.

Open loop geothermal energy for cooling / heating is the pumping of under ground water source through a Heat pump (or VRV) and the return of the water after the energy transfer. This method needs a constant water supply.

Closed loop Geothermal energy systems can be divide into two categories.

Horizontal closed loop Geothermal energy system is installed at least 1.5 meters below the ground with pipe spacing of at least 1.8 – 2.2  Rm per m². Output is 20 – 35W/m². This system has the disadvantage of requiring a large area to be installed.

Vertical closed loop Geothermal energy system where the loop is installed in a vertical bore well (6” – 8” diameter) and 60 – 120 deep. The minimum distance between the wells is 5 meters and the output is 40-70W/meter of depth, and depending on the soil structure. This system is more popular as you need less space and have a higher output.

The heat which is collected from the earth is transferred to the  system(Heat pump, CHILLER, VRV e.t.c.) and the exchange is made via heat exchangers and transferred to the cooling circuit of the unit as in a normal system. Due to the fact that the temperature is constant in the earth (±18.5°C) the energy required for this  this process is much less than in a normal system where the  air temperature is 40°C in summer and 5-10°C in winter.

Geothermal  energy can be used for under floor heating, fan coils, or for VRV systems, and the savings in comparison to a normal Air to water system can be up to 50-60% depending on the application and use of system.     

Photovoltaics is a term which covers the conversion of light into electricity using semiconducting materials that exhibit the photovoltaic effect, a phenomenon studied in physics, photochemistry, and electrochemistry.

A typical photovoltaic system employs solar panels, each comprising a number of solar cells which generate electrical power. PV installations may be ground-mounted, rooftop mounted or wall mounted. The mount may be fixed, or use a solar tracker to follow the sun.

Solar PV has specific advantages as an energy source, its operation generates no pollution and no greenhouse gas emissions once installed, it shows simple scalability in respect of power needs and silicon has large availability in the Earth’s crust.

PV systems have the major disadvantage that the power output is dependent on direct sunlight, so about 10-25% is lost if a tracking system is not used, since the cell will not be directly facing the sun at all times. Dust, clouds, and other things in the atmosphere also diminish the power output. Another main issue is the concentration of the production in the hours corresponding to main insolation, which don’t usually match the peaks in demand in human activity. Unless current societal patterns of consumption and electrical networks mutually adjust to this scenario, electricity still needs to be stored for later use or made up by other power sources, usually hydrocarbon.

Photovoltaic systems have long been used in specialized applications, and standalone and grid-connected PV systems have been in use since the 1990s.They were first mass-produced in 2000, when German environmentalists and the Eurosolar organization got government funding for a ten thousand roof program.

Advances in technology and increased manufacturing scale have in any case reduced the cost, increased the reliability, and increased the efficiency of photovoltaic installations. Net metering and financial incentives, such as preferential feed-in tariffs for solar-generated electricity, have supported solar PV installations in many countries.More than 100 countries now use solar PV.

( A)

A solar system is installed to provide domestic hot water .The  Solar system uses all the available solar energy and at times when it’s not enough an electric element.

The solar system consists of  2 Solar panels 1.5×1.0  & a 200 Litre  Hot water cylinder.

( B)

A multi split system is installed for the space air conditioning and heating of the villa. The system consists of  air cooled  Outdoor units and  Indoor units ( Wall type) . The benefits of the air cooled Multi system from the spit unit type air conditioning is the efficiency and less number of outdoor units and the ability to install the outdoor units much longer distance from the indoors .

( C)

A complete plumbing system is installed consisting of : ( a)  Central pipes using Pex-C pipe in pipe piping and manifolds for the piping of all the sanitary fittings for both the hot and cold water as well as the drinking water through out the project.  ( b ) A complete sewage system consists of all the pvc plastic piping for all the sanitary fittings to the first outside manhole. ( c ) Connection of all the sanitary fittings to the plumbing and sewage piping and installation of all the accessories. ( d ) 1 pressure pump system per apartment  to provide high water pressure to all the sanitary fittings,

Solar thermal systems use free heat from the sun to warm domestic hot water and can also supply your heating system. An ordinary boiler can be used to make the water hotter, or as a back-up to provide hot water when solar energy is unavailable. The system works by having solar panels called collectors usually fitted to the roof. These collect and convert the solar radiation into heat which is then transferred through pipes to a hot water cylinder. This system does not demand direct sunshine to operate so it will work all year round.
There are two types of panels, the flat plate panel and the vacuum tube panel. The flat plate panels are often preferred for looks over the tube collector. The vacuum tube panels consist of glass tubes in which the solar radiation is converted into heat. Mirrors behind the tubes concentrate the sun’s rays and the vacuum in the tubes allows almost no heat to escape. Because of this they are more efficient in the autumn, winter and spring than the flat plate panels.

Solar thermal can be used for heating systems (space heating). It is most effective for low temperature systems such as under floor heating. This can be achieved by installing more collectors on the roof and using a larger capacity thermal store instead of a normal solar hot water cylinder.
The biggest benefit of using solar thermal in conjunction with an underfloor heating system is the reduced energy bills. Once a solar thermal system is installed it has an extremely low running cost over its lifetime, so you can enjoy paying less for energy. This also means reducing your home’s carbon dioxide production and being able to rely less on utility providers.
Maintenance costs for solar water heating systems are generally very low. Most solar water heating systems come with a five-year or ten-year warranty and require little maintenance.

Via Science

Η εταιρεία Z&X Mechanical Installations Ltd στη Πάφο ζητά άμεσα να εργοδοτήσει για θέση γραφέα / βοηθό γραμματέα.

Απαιτούμενες ικανότητες και προϋποθέσεις:
– Πολύ καλή χρήση ηλεκτρονικών υπολογιστών και γνώση εφαρμογών και προγραμμάτων, ιδιαίτερα των προγραμμάτων MS Excel και ΜS Word.
– Ικανότητα οργάνωσης και προγραμματισμού εργασιών, ομαδικότητα.
– Ακεραιότητα χαρακτήρα, εχεμύθεια, εμπιστευτικότητα.
– Καλές διαπροσωπικές σχέσεις, ικανότητα στην επικοινωνία.
– Προθυμία να εργάζεται και εκτός του κανονικού ωραρίου εργασίας, όταν απαιτείται.

Τρόπος υποβολής αιτήσεων:
– Οι υποψήφιοι θα πρέπει να αποστείλουν ηλεκτρονικά το βιογραφικό τους στην ηλεκτρονική διεύθυνση sales@zandxgroup.com

Z&X Mechanical Installations Ltd in Paphos is now recruiting for the position of administration / assistant secretary.

Skills and requirements:
– Excellent knowledge of computers and usage of MS Excel and MS Word.
– Ability to organise and plan tasks, as well as be a great team worker.
– Integrity, discretion, confidentiality.
– Good interpersonal relations and excellent communication skills.
– Willingness to work outside normal working hours when required.

How to apply:
– Candidates should send their CV to sales@zandxgroup.com

LORENTZ PS Swimming Pool Pumps are high quality products designed for use in residential and commercial swimming pools and spas. In most pool applications all of the filtration needs can be met directly from solar panels meaning no electricity costs and significant benefits to the environment.

The LORENTZ pump uses a DC brushless motor for high efficiency and reliability, it is connected to a solar generator via a controller. The controller monitors the system, controls the pump speed and optimizes the amount of water pumped based on the power available.

Benefits

• Zero energy costs provide a very fast return on investment
• Longer life expectancy than standard AC motors
• Quiet and efficient
• Proven in service record
• Speed controllable to match the pool size exactly
• Smart modular design for simple and cost effective servicing and repair
• Fast and simple installation, direct replacement for an existing pool pump

Features

• Engineered in Germany
• ECDRIVE DC brushless motors, designed for solar with over 90% efficiency
• High quality non corrodible materials used throughout
• Solar direct connect with AC connection options
• MPPT technology to maximise power use from PV modules
• Optional data logger

Z&X Mechanical Installations Ltd is a proud dealer and representative of LORENTZ  in Cyprus. For more information, please do not hesitate to contact us.

Via Lorentz

The future is looking sunny for solar as the clean, renewable energy source gets cheaper – and fast. In just five months, the cost of solar plummeted an incredible 25 percent as demonstrated by two recent construction bids for solar projects in China and Abu Dhabi. On August 11 a bid of $0.46/W was put forward to build 500 megawatts of solar power in China and on September 19 a record low bid of $0.023/kWh was submitted for 1.2 gigawatts of solar power in Abu Dhabi.

China and Abu Dhabi are not the only places in the world seeing dramatic decreases in the cost of solar. A 100 MW solar project in Nevada recently submitted for approval would deliver electricity at $0.04 per kilowatt-hour (kWh). That is the lowest price ever seen for a US solar farm and much lower than the price of electricity for a new coal, nuclear or natural gas power plant.

A new report from the US Department of Energy found that the cost of clean energy technologies has fallen 41 to 94 percent over the past seven years. The report looked at wind, residential solar, utility-scale solar, batteries and LED lighting and found that all of the clean energy technologies experienced dramatic price decreases from 2008 to 2015. Wind and solar accounted for two-thirds of new energy installations in the US in 2015. The report found that utility-scale solar farm costs have fallen by 64 percent since 2008 and distributed solar costs have fallen by 54 percent.

One thing seems to be certain: Technology for developing renewable sources of energy gets better through time. And while it does, the cost of an energy efficient world becomes more and more affordable.

“We’re still learning how to further reduce the cost of solar cells and other components, as well as operation and maintenance costs,” said Frank Wouters, former director of Masdar Clean Energy. “There’s no reason why the cost of solar will ever increase again.”

Via inhabitat

Z&X Mechanical Installations Ltd is the chosen representative of LORENTZ PS helical rotor pumps in Cyprus.

LORENTZ PS helical rotor pumps are high quality products designed for drinking water supply, livestock watering and smaller irrigation applications. PS helical rotor pump systems deliver water economically, cleanly and reliably, anywhere.

The LORENTZ PS range of DC powered helical rotor pumps have been designed specifically to pump water efficiently using solar power. The helical rotor pump is simple, efficient and reliable, pumping water with very low levels of solar power from up to 450 m below the ground.

Each system consists of a pump, pump motor and a controller. This modular concept keeps all electronics above ground providing, simple servicing, ease of access and a low cost of ownership.

Benefits

• Long life expectancy and proven in service record
• Designed for use in remote and harsh conditions
• Smart modular design for simple and cost effective servicing and repair
• Water filled motors for reliability and to avoid oil contamination
• Fast and simple installation
• Cost effective spare parts philosophy
• Very strong ROI against diesel powered pumping
• Large range of pumps to closely match each application and optimise efficiency

For a free consultation and case study, feel free to contact us on +35726945222.

Electricity produced by photovoltaic systems is pure – green energy. Because they do not use fuel other than sun rays, Photovoltaic systems do not loosen any dangerous air or water pollution into the environment or destroy natural resources. They produce energy supplied by nature it is thus free and endless!

Photovoltaic systems can operate reliably for long periods of time with almost no maintenance. Small photovoltaic systems can take place of unused space on rooftops of existing buildings.

At Z&X Mechanical Installations Ltd we provide you with free study for your perfect photovoltaic system at the best oriented position at your rooftop or in a field. We have proudly been installing solar thermal and photovoltaic systems for over 7 years and this experience is reflected by our ability of completion and licensing photovoltaic systems.

Our mission is to give you the chance to see the future technology through our excellent and high quality services at competitive prices.

For more information, please do not hesitate to get in touch on +35726945222 or at info@zandxgroup.com.

Solar panels are one of the fastest evolving energy sources around the world, giving an alternative way of providing energy for your home apart from electricity.
Solar panels are devices that capture daylight and convert it into electricity. Domestic solar panels are fitted to the roof basically or can be installed on the ground at the best possible angle to receive all-day sunlight. Properties facing south have better results, but with little formal exclusion from south it works perfectly.
The price of gas and electricity continues to rise and bills are increasingly expensive. What better way is there to protect yourself from continuously rising costs, than by producing your own electricity?
Solar panels will work efficiently for at least 25 years, cutting bills by over €800 (3KW) a year up to €1300 (5KW) a year.