to the Solar CollectorBrainstorming and Development
Water Project 1
Water & Space Heating
recent research has indicated that HVAC systems (heating, ventilation and air conditioning) contributes to approximately 62% of the energy consumption of auxiliaries on board.
I am currently investigating how solar and wind energy can be used to support these systems however, weight has a considerable role in the performance of vessels and I would like to ask the members of this forum as to whether they have investigated the use of lightweight solar collectors? Is this even possible? What sort of challenges may I face when considering light weight solar collectors?I look forward to reading your opinions.
Hi, I am not a marine engineer or anything, but I would not necessarily look to *solar* energy for "supporting HVAC" I mean, a ship has an enormous powerplant so space heating (by air or by water), and domestic hot water are not, in my layman's view a big problem... A ship probably WASTES more hot water from its steam turbine, than me and all my neighbours put together, could get through in five years !Nonetheless, everything is relative, and I supposed we *are* suppose to think green these days, and no doubt you are looking at downsizing ancillary equipments, in order to make lower demands on the prime mover in the 1st place, so that is good for the planet , I guess !(Using the aircon on my car increases the fuel consumption by 10 percent ! but so does having underinflated tires !)(Many cars in Europe now come with two batteries ! because one is not enough, there's so much electronics on vehicles !)Since I have (apparently) a problem getting my head round our "classic" solar techniques of thermosiphon, I propose to ignore those approaches for onboard ship, and that just leaves you with PV (photovoltaic).(By the way, I fail to see how WEIGHT is going to be an issue (except an academic one, that is...): designing a system for use aboard a 80,000 ton vessel, would make it a twenty-ninth order priority, in my view...)Apart from PV, not many options, therefore... Well, YOU COULD install a solar furnace, but it would be tough - on land they require tens of hectares, and loads of computers to focus the mirrors on the lens (normally a very HIGH tower), so on a ship, that just does not bear wasting brainpower on !)(at last for another 20 years I guess...)I ought to state, I have zero experience with PV - try visiting the PV section of this site and brainstorming with some knowledgeable folx on there...
OK, you could install a square mile at least of PV panels on a good-sized container vessel, and in addition, drive around or across the tropics - wow !However, the biggest problem wth PV would be SALT ! and atmospheric muck, not to mention CARBON from the ship's exhaust stack...You *could* install electrostatic systems to help, but that is even *more* expense... On land, cleaning of PV is a nightmare that nobody who buys them ever thinks of - most folks can't do this job themselves (safety, roofs ladders, accident insurance etc.) so cleaning of PV is becoming a GROWTH INDUSTRY... I would say, is the biggest problem with it -- if you DON'T clean, then efficiency drps off REAL quickly... At least in the industrial areas where most of us live - in the country, you might get away with it, but what about FARM DUST (after harvesting etc...).So cleaning PV will be a genuine headache - you would need robot systems to do it - corrosion sensors, salt eliminators, water jetters, spray gear, you could not put deck hands up there, in their normal shoes, to clean a thousand square meters of PV panels while transiting Cape Horn on a bad day... Anyhow, I hope you find this amusing, if not informative !Here's wishing you luck in your endeavors,Garage_HermitPort du Légué
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