PHASE I : MARCH 2013 - SEPTEMBER 2013 PHASE II : SEPTEMBER 2013 - JULY 2014 PHASE III : JULY 2014 - SEPTEMBER 2023 In phase one, the boats will be retrofitted off-site and the site will be prepared for the phytoremediation garden and infrastructure installations. Efficiency targets have been defined for each boat in terms of heat and electricity demand, water use, and sewage management. Because the budget is limited, we will follow a priority list of modifications that need to be made to each boat, focusing on major changes to the building envelope (insulation and roof), and continuing as far down the list as the budget allows. Aſter installing the insulation and heating system, we will continue with electricity-efficiency measures, green roof construction or DIY greenhouses, and the installation of dry toilets. Additional upgrades will be made over time once the boats are placed on site. We estimate a minimum of 160 hours of labor per boat for the basic installations recommended in phase one and a conservative estimate of 240 hours. The materials budget is limited to 5.000 €. In phase two, the boats will be placed on site and essential site infrastructure will be constructed, including communal sanitation and wastewater treatment facilities as well as the walkways and phytoremediation garden. Phase two is currently scheduled to begin in September 2013. Shallow platforms will be installed on-site to stabilize the boats, prevent them from sliding, and provide additional insulation. The walkway will be constructed and used to store some infrastructural elements such as electricity cables. The interior of the boats will be further improved, with individual boat owners having the option to further reduce electricity consumption demand and upgrade water purification and heating systems. The communal wastewater treatment and biogas plant will also be constructed at this time. The construction of this facility is partially dependent on finding an appropriate partner (wastewater utility or private company) willing to assist with the final engineering and exploitation of the plan. In this phase, we will prepare the site for food production in raised beds. Community monitoring equipment will also be installed to record and showcase the system’s performance. We estimate around 800 hours of labor for communal installations and a total cost of around 10.000 €. Phase three is the least defined because it is largely dependent on the progress made in the preceding two phases. Exact activities will depend on the availability of financing and community investment preferences. At minimum, we expect that site additions in this phase will include floating garden platforms, electric power generation capacity, and a variety of potential upgrades to existing systems. An inexpensive DIY system of solar PV panels will cost an estimated 5.000 € per boat, with additional costs for efficiency boosting elements (e.g., concentrators) and electric storage capacity. However, as technology is advancing rapidly in the solar sector, it is possible that these prices will be lower by the time a purchase needs to be made. With the capacity to sell excess electricity back to the grid and highly energy efficient offices, we have calculated that these inexpensive solar installations could have a payback time of as little as five years. A decision about whether to invest in additional power generation or other technologies should be made by the group during phase two. Pagina 34
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