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14

Operating one cooking appliance would be more efficient. Using your two-pot method, to maintain the boiling water once it is transferred to the cooking pot, you'll have to first bring that cooking pot up to temperature. During that time, the system inefficiencies are in effect for two systems, and heat and energy are being lost. The heat being radiated ...


11

I live off-grid, so I did a lot of study on this topic. All used coffee grounds make good fertilizer. Drip machines seem to use a lot of energy, and they seem to use it for a lot of time. They also use disposable filters. Drip machines are kind of on the off-grid "blacklist". Percolators waste a lot of energy because they have to keep the water boiling ...


9

Solar thermal Given your limited criteria, solar thermal is in fact the ideal solution. I assume you say that "[solar] heating is so inefficient and the materials for solar panels introduce a can of worms sustainability", you refer to PhotoVoltaic panels, and not solar concentrators (mirrors and lens), which are silly cheap and sustainable. A large ...


7

I am by no means an expert in rocket stoves, but just in case we don't have a rocket stove expert here, I'll offer what I know. While rocket mass heaters have become popular in the USA as an efficient way for hippies in cob houses to stay warm with very little fuel, they originated as a way to cook when wood fuel was scarce. The basic principle is this: ...


7

From the Encyclopedia of Country Living by Carla Emery, which I cited here before and can warmly recommend to anyone: This makes about 5.5 sqm per kg of rye (grain or flour, doesn't really make a difference).


6

Your grinder may be less efficient than a commercial unit, and shipping beans rather than ground coffee may affect the bulk for shipping. If you use extra (hot) water in washing a permanent filter you may be better off using unbleached paper filters and composting them along with the grounds. I find that you can't put lots of coffee grounds through a ...


5

I'm going to focus my answer on 'recycling' the wastes and let someone else answer how to reduce kitchen waste. If your municipality doesn't collect and process kitchen and garden wastes then you can start composting (a lot of) the kitchen waste yourself. Basically you have 3 options: 'Regular' composting: create a compost pile or setup a compost bin in ...


5

It's going to depend on several factors. There is no one universal answer. It will depend on: the source of your electricity the rate of leakage of methane in your gas supply the relative efficiencies of the gas and electricity cookers under consideration the impact on your domestic heating / cooling energy consumption of the additional ventilation required ...


4

Based on personal experience, I agree with Zach's conclusion that the dedicated water boiling kettle is more effcient than the stove. My 1500W electric kettle boils a liter of water about 2-1/2 times faster than a covered pan on my stove's 2100W element (4 minutes versus 10 minutes)... and more than 3 times faster than the stove's smaller 1600W element). ...


4

Another idea is to reuse your wasted veggies and turn them into the food source for more food for yourself. We own chickens, who will eat almost anything. Here is a good chart to figure out how to recycle your table scraps into food for something that in return provides food for yourself. There are several types of fish you can also grow in small(er) ponds (...


4

Cold brew, which is essentially soaking the beans for 24 hours would only call for energy to roast the beans and to filter them. If you used a metal filter, there wouldn't be ongoing disposable costs, but some quantity of energy is needed to create the metal filter. If you used the lightest roast, that would minimize the the energy used in roasting. In ...


3

There is cookware that uses insulation for cooking, not quite in the way you envision, but close enough. I'm referring to a cooker Thermos Shuttle Chef, popular in Japan (as シャトルシェフ). It's an ordinary pot, but comes with a well-insulated case. You cook rice, for example, for 8 mins. (on an ordinary stove—no insulation, yet) and put the whole pot into the ...


3

If you are able to heat the oven from a renewable source (like solar energy, wood, biogas), this would be most efficient way to do it in terms of CO2-emmissions. Often, this is not possible. Then you have to choose basically between an electical and a gas stove. In this case, a gas stove is best, as long as less than 70% of electricity comes from renewable ...


3

If you live remotely, and have lots of wood or other biomass growing out back that you can harvest by hand, and that will grow at least as fast as you harvest it, then that is probably the most sustainable cooking fuel. However, this sort of cooking is typically 30-40% efficient, so high inputs are needed for a given output. For everyone else, then ...


3

Your phrase "not exclusively from renewable sources" straddles a great deal of ground, which makes any answer necessarily hedged. Great job above by EnergyNumbers. If I might illustrate my point: Look at BC Canada vs. California USA. http://www.empr.gov.bc.ca/EPD/Electricity/supply/Pages/default.aspx ^^ Those are just estimates, but 82% hydroelectric and ...


2

A water boiler or hot water tap are the most efficient ways to heat up water since they are insulated, keeping all of the heat in the container and water (and not the air). I would say that your best bet is heating water with the water boiler, pouring it into your pot, and cooking on the stove from there. Some heat would be lost to the container in the ...


2

The easiest design I've ever seen was made from materials obtained from a "Dollar" store. It was a cone shaped design made from: A windshield reflector Velcro A cooling rack A black enamel pot. The windshield reflector was folded into a cone shape with the indention to fit around the rear view mirror forming the "tip" of the cone. Velcro was applied to the ...


2

Stovetop vs water heater efficiency A gas stove-top is about 44% efficient (source), and a modern natural gas water heater with a tank is up to 67% efficient (source (pdf)). Basic formula From this answer on Chemistry.SE, the energy needed to heat a liquid from one temperature to another is: Q = (mass)*(specific heat)*(change in temperature) For water, ...


2

This answer won't cover all cases, but when you are cooking with water it starts boiling at roughly 100 degrees and won't get any hotter (unless you boil it dry). Unless you're steaming, cooking a reduction or need the vigorous motion of water boiling hard, you may as well turn down the element at that point to save energy. Often foods don't cook until ...


2

If the toaster oven is an option, it would generally be more efficient than a full-sized oven (unless the toaster oven is on it's last legs and the oven is a brand-new version, or something to that effect). Because the toaster oven is much smaller, it would require much less energy in order to create enough heat to cook your food, whereas the full-sized oven ...


2

Propane releases 59 kg CO2/GJ, which works out to ~0.06 g/BTU. On a 70000 BTU grill, that's 4000 g, or 4 kg, or 8.8 lbs CO2 per hour. Natural gas releases 49 kg CO2/GJ, or about ~0.05 g/BTU, or 3500 g, or 7.7 lbs CO2 per hour. There's are a lot of variation in types of charcoal due to different binders used, but consensus it's that about double natural gas....


1

A study recently published in Resources, Conservation and Recycling journal provides evidence that meal kits have a smaller carbon footprint than grocery shopping. From the study "Comparison of Life Cycle Environmental Impacts from Meal Kits and Grocery Store Meals": on average, grocery meal greenhouse gas emissions are 33% higher than meal kits (8.1 kg ...


1

There is quite a range of different meal kit services. To subscribe means to take that service for a longer period. We (in Germany) have different services. Some of those services just provide a weekly box of vegetables, potatoes, etc. with recommendations for recipes. That is ok, but leaves you with the decision to take what you like according to your ...


1

The page HealWithFood describes four alternatives to Teflon and declares: "The manufacturing process for PTFE (Teflon) cookware uses a chemical called perfluorooctanoic acid, or PFOA, which has been shown to contribute to the development of certain types of tumors in laboratory animals and which seems to increase the risk of thyroid disease in humans. PFOA ...


1

Cast iron, correctly seasoned and maintained, is very effective at providing a non-stick surface. Many cast iron pans are available "pre-seasoned" but this cannot generally be relied upon to be a complete seasoning. Regardless, periodic re-seasoning (and correct use in the interim) is required. Re-seasoning involves a thorough cleaning to remove the old, ...


1

Any water heater built in the last 10 years will be significantly more energy efficient than your stove. At the same time you might want to consider a number of other variables if you are really into crunching the numbers on this. 1) you mentioned that your pipes are not insulated but didn't say how much pipe the water travels through before reaching your ...


1

For your health you should consider the best ways to produce and recycle filter paper. "The problem with French press and other types of unfiltered coffee techniques lies with blood lipids. Compounds from coffee can raise total cholesterol, triglycerides and bad LDL cholesterol (European Journal of Clinical Nutrition, August 2012). The culprits are in ...


1

First of all, if you really want to cook green you should buy neither and instead go for a solar oven or solar cooker (more info on this on Wikipedia). However, if you live in a place where it is often cold and clouded then this isn't very practical. Now, back to your question about ovens. There are two ways of looking at this: How much energy and other ...


1

For casual use, have the feed come in at a slope to the burn chamber allows the stove to self feed as the ends burn off. The burn chamber has to be large enough for the heat to start pyrolizing the wood chunks. If the chimney is the same diameter as the feed tube it's harder to get a balance of air speeds that will keep the fire from moving up the feed ...


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