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Residential house energy class a+
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Residential house energy class a+


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  • 1. Residential House Energy Class A Building characteristics The residential house in photo has been certified as energy class A+. The total covered building area is 750m2 consisting of two floors. Downstairs we have the swimming pool outside in the garden. Dimensions of the pool are 25x5 and the volume is 180m3. There’s also a large living room, kitchen, cinema room and a bathroom. On the first floor now we have 6 bedrooms, office of the owner and two bathrooms. Thermal and cooling loads Thermal load of the building has been calculated at 45kw with an external ambient temperature of -5ο C using the radiant system. The cooling load has been calculated at 65kw with an external ambient temperature at 42ο C. We choose a geothermal heat
  • 2. pump 45kw thermal and cooling load with a recovery system producing domestic hot water at 60ο C. The rest of the cooling load has been designed to be covered with direct expansion fan coils. So the maximum efficiency we can get from radiant cooling is 50w/m2 ,the rest 15 kw are covered from the fan coils and three water cooled VRV systems by Daikin ,only if the outside temperature exceed 40οC. If the system was designed with chiller and fan coils or vrv system the thermal and cooling loads would be 45% more. Benefits of using geothermal The extremely interesting thing regards the efficiency and economy of the system due to the constant temperature of the earth regardless of climate change. Practically, we can look back through the comparison with a simple air conditioner. During a hot day of summer (40-45 ° C), we all know the decline in performance of the air conditioner and the inability to adequately cool the space. This is because the device is required to expel heat into an environment already saturated by thermal load, and make futile effort consuming excessive amounts of electricity. If the air conditioner expelled heat to a cooler environment such as soil, and the temperature remain constant independently of external climatic changes, their odds would be too great and the economy in electricity enormous. In this principle of thermodynamics is based the use of geothermal heat exchangers that take advantage of stable soil temperature with the minimum power consumption The concept of combined geothermal energy and Thermal Active Building Systems (TABS), Known as GEOTABS, has been developed the last years and has known great success. The energy saving potential is substantial, starting from 20% and going up to 70%. For a system like this though, to reach its maximum potential of energy savings, professional design, control and installation, combined with a product of highest quality, must be combined from feasibility stage to final building-in-operation stage. The latter means that experienced and professional partners are considered crucial for system optimization. Another and last great advantage that ground energy heat pumps can give you is the long life of the equipment. No need of service because the unit is in a closed and protected space area. Not affected by moisture, sand and external conditions.
  • 3. Machinery room & geothermal collector The photo shows you the complete installation. We have one geo heat pump producing hotcold water and domestic hot water. One geo heat pump producing only hot water to heat the swimming pool and another heat pump producing only cold water for the wine room. Geothermal collector is outside in the garden.
  • 4. Comparison cost-energy saving BUILDING Air Conditioning surface Relative & required cooling Power Energy Consumption /Year 750 100 75.000 m2 in total w/m2 kW Air cooled system Geothermal Heat Pump COP 3 COP 5,0 Power Consumption 25.000 kWh 9.091 kWh eur Power Consumption El. Power Price / KWh El. Power Price / KWh ( with Fixed Ch and taxes 0,15 0,15 eur El. Power Cost /year 3.750 eur El. Power Cost /year 1.363,64 eur Total Cost per year 3.750 eur Total Cost per year 1.363,64 eur 2.386 63,64 eur % Saving for Cooling with the use of Geothermal pump per year Conversion of Savings in USD Per Annum BUDGETARY Total Exchange 1.36 750 sqmtr Qty Unit Euro Euro USD as on 18.10.13 60 KW GHX Pump 1 9500 9000 12240 750 sqm Radiant Cooling 750 50 37500 51000 12 fan coils 12 635 7620 10363,2 Controls machinery room 1 15000 15000 20400 Geo Exchanger 10 300 3000 4080 Drilling ( in feet) 800 20,00 16000 21760 88120 119843,2 750 sqmtr Qty Unit Euro Euro USD as on 18.10.13 100 KW GHX Pump 1 15000 15000 20400 12 fan coils 24 635 15240 20726,4 Controls machinery room 1 15000 15000 20400 Geo Exchanger 10 300 3000 4080 Drilling ( in feet) 800 20,00 16000 21760 64240 87366,4 WB Chiller VRV 39 67000 60000 figures in USD Savings P.A. Radiant Cooling + Geo 29475 Geo ( 45% less efficient than RC) 22673 WB Chiller 0 VRV 0 Incremental Cost for RC + Geo @ fixed En Cost Pay back in Years CAPEX USD 119843,2 87366,4 67000 60000 52843,2 1,79
  • 5.
  • 6. The M.E.P. (mechanical, electrical and plumbing) studies office with the title Cambicci+Associates was founded in February 2007 by Gerasimos Kampitsis (Yerasimo Cambicci), Mechanical Engineer of the Aristotle University of Thessaloniki, following his work experience in electromechanical design and supervision since February 1992. Furthermore the office was manned with electrical and mechanical engineers Aiming at the technologically sufficient and on time preparation of m.e.p. studies and supervisions. A consulting and engineering services company was legally constituted in 2012. The scope of our office in its current form is: • The elaboration of m.e.p. installations studies, for all types of projects (buildings, urban design and infrastructure). • Renewable energy systems design • Nearly zero energy buildings design • Energy feasibility inspections and evaluation of buildings • Obtaining permits and licenses for buildings and installations • Lighting Studies • Supervision for all of the above subjects. • Consulting Services as a Project Manager