Heat Recovery Ventilation
The purpose of ventilation is to provide us with healthy fresh air indoors. It removes old, stale air and takes in clean, fresh air. Of course it’s main task is to ensure that the air indoors is healthy to breathe.
The traditional method of ventilating our homes is to put a hole in an external wall or use window vents allowing vast amounts of heat energy to escape. Ventilation needs to be focused on energy and providing a healthy environment in which to live.
Using ventilation systems with heat recovery will reduce energy consumption, lower running costs and reduce CO2 emissions.
INTRODUCTION TO SOLAR WATER HEATING AND ENVIRONMENTAL SAVING.
The sun is the ultimate source of most of our renewable energy supplies. Energy from the Sun is clean and abundant. There is a widely held opinion that Ireland does not have enough ‘sun’ to make solar systems worthwhile. In fact parts of Ireland have annual solar radiation levels equal to 60% of those experienced at the equator. However, this energy is not received uniformly troughv out the year. Some 70% of Ireland’s annual radiation is received over the period April to September and 25% is received in the months of June and July. Solar water heating technology is about capturing this energy and converting it into a form that can be used in buildings, industry etc. to substitute for fossil fuel energy.
APPLICATION OF SOLAR WATER HEATING.
Water Heating is required for space heating, domestic water heating, agricultural and commercial usage. Solar Water Heating can be used to a greater or lasser extent for each of these water heating applications.
DOMESTIC WATER HEATING.
Incoming mains water is usually at a temperature of around 10oC In Ireland and has to be heated, under recent recommendations, to a storage temperature of 60oC. For water heating, a typical house uses 5 kWh per day of useful energy (that is the energy content of the water leaving the tabs). This figure can very considerably from house to house, dependant on house size and water usage. A well designed system will provide typically up to 100% of a family’s hot water requirementsvduring the summer months of April to September and make a useful contribution during the rest of the year. In a typical year overall the system will provide 50-60% of a family’s annual domestic water heating needs.
Heat is widely available in the ground, air and water around your house.
These natural sources of heat are constantly replenished by the sun, wind and rain. A heat pump system will harness these free and renewable energy sources for heating your house and supplying hot water at a very low cost. The role of the heat pump is to ‘pump up’ heat from a low temperature source, for example the ground under your lawn and release it at a higher temperature into your central heating system.
OK. BUT WHY IS IT SO ECONOMICAL?
Because at least 70% of your heat will come from a free source.
For every unit of electricity used to drive the heat pump, 3 to 5 units of useful heat will be generated.
Manufacturers generally refer to the ratio between the useful heat produced and the electricity used as the co efficient of performance.
With an overall energy efficiency in excess of 400%, compared to 70%-85% efficiency for a good oil or gas boiler, no wonder a heat pump is so economical.
AND GOOD FOR THE ENVIRONMENT…
When driven with conventional electricity, a heat pump system emits 40% less CO2 emissions than a boiler.
That’s a great contribution to the fight against climate change.
But if you can operate your heat pump with green electricity (e.g. from wind farms) then your central
heating system becomes 100% renewable and totally free of greenhouse gases emissions.
FINE. WILL IT FIT MY HOUSE?
If you are building a new house, you are in the best position to do it.
You can cover the extra cost with your mortgage and finance the installation at a low cost.
Make sure your house is well insulated and opt for a heat distribution system operating at a low temperature (e.g. underfloor heating or fan coils).
This ensures optimal performance of your heat pump.
The heat pump itself requires little room and will fit neatly into your utility room or hot press.
- The Solar assisted heat pumps join 2 incomplete technologies, the heat pump and also the solar thermal collector.
- Heat pumps are quite economical instrumentality however the heat they produce from their renewable element varies solely in keeping with oscillations within the temperature of the atmosphere.
- Solar thermal collectors are the simplest supply of warmth on hot and sunny days however they\’re wholly inefficient whenever there\’s no sun.
- The solar assisted heat pump, through a consistent physical diagram thereto of a daily solar thermal system with forced circulation and sharing a number of the elements of heat pump, managed to surpass the restrictions of the referred 2 incomplete technologies.
- Through the cooling liquid (R134a) that covers a loop, the liquid goes into the solar thermal panel and suffers the action of sun, rain, wind, atmosphere temperature and different climate factors. throughout this method the liquid gains heat during in a lot of favorable manner than a heat pump.
- After this stage, the warmth is transferred to associate exchange with the assistance of a little mechanical device that heats the water. The liquid cools own and also the circuit are reprocess.
- As the fluid encompasses a boiling temperature of roughly -35ºC, the system works even once there\’s no sun and it even works at night time, providing plight at 60ºC, twenty four hours each day, not like the normal thermal system.
Imerys: the market leader in clay technology now celebrating 200 years of quality manufacturing standards, have designed a fully integrated Photovoltaic system for the roofing industry using standard roof battens. This makes the PV system quick and easy to install without the use of counter battens.
Imerys PV modules are installed by roofing contractors at the same time as the roof tiles ensuring complete synergy between the two.
Integrated PV Adventages
The Imerys PV module only weighs 7kg, reducing the roof loading weight by over 30 kg/m2 , therefore no additional live or dead load structural calculations are required. With on-roof systems there are concerns over the suitability of roof trusses carrying the extra weight and stresses, leading to increased costs. All connections are made without penetration of the roof membrane ensuring the water tightness of the roof is maintained.
Integrated PV Advantages System security is becoming an increasing issue in mainland Europe, where on-roof systems are quickly and easily removed from roofs, however the Imerys PV module is directly secured into the roof with hidden fixings, reducing the risk of theft
Industry Leading Guarantee
All Imerys PV Modules have a 25 year, 80% minimum performance warranty with the added benefit of a 30 year anti-corrosion guarantee on the aluminium frames, including a 30 year watertightness guarantee. * This industry leading triple guarantee provides complete peace of mind for the whole roof when combining our roof tiles, which themselves have a comprehensive 30 year durability guarantee. We felt it was important to offer our PV Modules a guarantee that matched the integrity and durability of our quality range of roof tiles. When our PV system is installed with other (non) Imerys products, the overall guarantee is 15 years, which still betters the industry standard of just 10 years. The PV Module performance warranty of 25 years is still maintained.