Abstract
The advantages of green roofs are well documented, ranging from heat island reduction, thermal comfort, air quality, stormwater management and energy savings for buildings. However, it has been shown that green roof retrofits are more effective in old, low efficiency buildings. This paper studies the possibility of retrofitting a high efficiency solar house with a green roof system being partially shaded, optimising its characteristics by means of parametric simulation. The input variables of the green roof system are: growth medium thickness, LAI (leaf area index) and height of plants. The output variables by which the different green roof systems are compared are: annual energy demand for heating and for cooling. The study concluded that the average reductions of energy consumption when retrofitting an efficient building with an extensive green roof are of 1.01% for heating and 4.61% for cooling, but optimising parameters (low LAI in winter, high LAI and height of plants in summer) can get reductions to 1.55% for cooling and 5.95% for cooling.
Highlights
Solar Decathlon competitionIt challenges collegiate teams to design and build, at the site of the competition, solar house prototypes which are monitored and juried by 10 contests, varying from architecture, engineering and construction, energy efficiency, comfort conditions to sustainability and innovation
1.2 EFdeN Signature prototype1.1 Solar Decathlon competitionSolar Decathlon is the most important solar architecture and technologies competition worldwide, started by the U.S Department of Energy in 2002
Solar Decathlon Middle East 2018 was the first competition of this kind to be taking place in the Middle East, with the intention of developing and promoting ideas, capacities and technologies that can be implemented for the benefit of the inhabitants of the Middle East region
Summary
It challenges collegiate teams to design and build, at the site of the competition, solar house prototypes which are monitored and juried by 10 contests, varying from architecture, engineering and construction, energy efficiency, comfort conditions to sustainability and innovation. House EFdeN Signature is the solar house prototype which represented Romania in the Solar Decathlon Middle East competition in 2018, the first to be taking place in an extreme hot and humid climate, Dubai. Cooling is done with a multi split system with two indoor units, this system combination having a cooling capacity of 8.5 kW, a SEER of 6.97 and a SCOP of 4.71 Features that improve both comfort and energy efficiency are the airflow distribution smart systems of the indoor units. The system turns off all the lights in the house, stops some of the appliances in use (TV, oven, stove, washing machine) and keeps turned on only the ones that must remain powered on (fridge) and reduce the power of the HVAC system to avoid the waste of energy
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
