This is a compact, foldup, easy to carry and setup solar cooker that you can either buy or make. It heats water in a central, vacuum insulated, glass tube using reflectors to direct sun onto the tube. A very well thought out and researched solar food dryer from Dennis Scanlin at Appalachian State University. However, we are now seeing new developments within architecture which permits the use of natural lighting, ventilating & heating, these technologies come under the term of passive design. I have been working on several different platforms to understand the potential of passive design within the marine industry.
One uses a roof design which enhances the Bernoulli effect and thus creates low pressure regions pulling air from the interior without the use of mechanical systems.
Clearly these systems require advanced engineering and experimentation but the principles have been exercised successfully in architecture which begs the question: Could passive design be used in the large domestic yachting industry?
Location: Spain I do not know if this new system takes into account that the air conditioner, as well as controlling the temperature, and above all, should control the humidity.
Third masts are in pretty high compression, and the plate they rest on needs to be extremely strong. As you mention this would be a very significant undertaking, and require a good amount of engineering work. Location: Great Lakes I would put your efforts into air sealing and insulation. Natural air flow , fore and aft, inside a boat is always interrupted by cabins , cabin doors and bulkheads..
Also study isolating and extracting machinery heat and particularly the battery bank heat.
The big problem with generator driven air conditioning is that as soon as you shut down the generator and AC the latent heat of the machine room and charged battery banks re warms the entire boat.
Location: spain Typically the wheelhouse of a yacht is built on top of the engine room. When motoring, the engine room heats the floor of the wheelhouse and drives the temperature inside the house to 40 plus degrees.
Location: United Kingdom Whole System Design Stratergy Thank you for your comments! I have also been doing some work on PCMs (Phase Change Materials) as an alternative to preconditioning incoming air.
The idea being that the natural ventilation strategies will pull the air through (Perhaps supported by low voltage mechanical systems) the PCMs and thus cool the incoming air.
Internally I have come up with some very basic concepts of channelling exhausts from high heat gain sources to furthure reduce the load on conventional HVAC systems. Location: Italy (Garda Lake) and Croatia (Istria) The AC load is not only due to heat exchanged through the windows. High-efficiency (90% and more) heat recuperators, like the ones produced to meet the stringent EU energy efficiency goals, can be used to recover a major part of the power expended for heating and cooling the inlet air. Regarding your solution of capturing the hot air above the point where it is created, it is ok for the summer condition. Location: Beaufort, SC and H'ville, NC I see several have chimed in while I was typing this.


These need to be figured hour by hour based of usage, and as a function of outside conditions so seasonal effects and changing routes can be figured in. It needs to be done regardless of whether it's passive or conventional and there are charts of this stuff for anywhere in the developed world.
On board systems differ from shore systems principally in that the cost is pretty steady on board, where there is a peak rate system of pricing for shore systems. For passive systems, you are lossening up the temp control and you must do everything you can to retain comfort control. All up, the boat ran at about 80 amps average while under way, so the tv wasn't really the problem. Location: spain Mechanical system optimization mean nothing if you cant get the solar energy off the decks.
Location: Great Lakes While windows with solar reflective coatings work well, I also agree with some type of shades or snap on covers for windows. Decks should be white (anodized aluminum is even better, but it's not as practical) and well insulated (as in inches of foam). When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Passive design has been stimulated by its growing success within Europe, with some buildings operating ?without the use of active forms of air conditioning despite high internal heat gain sources? (Thomas, R.
The other uses a development of a solar thermal chimney where the mast section is used to enhance the stack effect and induce natural ventilation.
This acts as an attachment point for halyards, lights, wind instruments, radio antennas, ect. It would take a good bit of engineering to cut open the deck into the bottom of a deck step mast, without sacrificing this strength. But I do believe that Passive design has a high potential within the marine industry, particularly on large vessels.
Many of the PCMs I have discovered are salt hydrate based and can be engineered to have different phase change temperatures. A lots of power is expended to heat and cool the fresh air moving through the ventilation system. In the winter, however, that same hot air is a free collateral heating for your cabin, so you have to devise a system which will allow you to make use of it before expelling it outside.
Oiled wood and natural fibers feel comfortable over a wider range of temps and humidities than plastics. Weight reduction is a huge deal with respect to propulsion, and I suspect that using light weight furnishings and tight climate control is better than luxurious, heavy, cozy, high maintenace furnishings and a less intensive climate control.
The problem with these, and your design, is that during bad weather they must be fully sealed. You would have to find a way to still allow for all of this, since most of it cannot be compromised. Making the vessel very site specific but may be of use to medium sized catamaran platforms. However from preliminary research I managed to find that a large portion of the HVAC load is from solar thermal energy coming from the windows. Here I was thinking of using a polymer shield between a large TV and media system (which would otherwise exhaust heat into the room) attached to an exhaust ventilation shaft directly above.


One way of doing it might be to make it got through the above-mentioned heat recuperator, where it will be used to pre-heat the inlet air.
Passive usually works if there is the ability to control or encourage the usage of certain areas at times that make the most sense.
To get passive to work, you need a fairly good time dependent model of the individual spaces, and this model needs to be incorporated into the control system of the actual space when built. This is a slideshow of type A boat i made when i was 12 it took just about sextuplet weeks to make.
The plywood boat constructed from the free D4 boat plans have been downloaded over a hundred thousand times. These systems can also take up a considerable amount of space and in some cases have been the result of bad health due to microbial growth within ducting.
I don't know enough about your system to comment on this, but it would need to be taken into account.
In architecture it is known that 42% of the cooling load is from windows orientated to capture solar energy. The heat from the TV and media systems, could potentially help good ventilation behind the installation and reducing the risk of mould growth etc.
So General Arrangement plays a huge role in passive, and houses and other buildings usually have a lot more freedom in the GA department than do boats. You need a lot of extra sensors to monitor comfort and assess the effect of the passive system from moment to moment.
So the crossover point is probably drifting towards better and more sensors, more control over separate zones, better predictive control systems, and occupancy sensors that turn remote control over to central control when a space is unoccupied. For a boat such as the cat pictured (edit, I just noticed the size of the boat- a bit bigger than the 50'er I sailed on), isolating the engines and tanks from thermal transfer to the aft cabins would be number one.
Otherwise the basic intention here is to ensure that high heat gain sources are close to exhaust shafts. Passive puts huge restrictions on zoning since it usually requires big zones that influence one another.
Needed a gravy boat for lake fishing no plans just read lots of boats I liked atomic number 53 like the Jon boats thus I built this. The polymer shield can also be polarized so as to allow only the TV screen to be seen thus doubling as an interesting design feature.
Ane Master of Arts building antiophthalmic factor Plywood jon gravy boat and I would wish advice on the outflank caulk to use for the seams. I assume that All of the equiment is aft- gensets, watermakers, engines, hot water heaters, hydraulics, and fuel.
It was This is a video showing you how atomic number 53 made my electric plywood gravy holder and a litle test outpouring peradventure iodin bequeath place an solar. If possible, set a couple ac compressors there as well, but they would normally be in a cabnet in the aft cabins.
All were water cooled (which sucks if you are on the hard for a week) and seven were in the bilge where the heat helped keep the bilge dry.



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