They cause distribution system congestion, and significantly increase the electricity bill.
Ground, below 4/5 ft below surface,is having, low temperature(15 to 20 degree Celsius below.).By blowing air from wind turbine to the underground metallic/cement pipe, feeding the home cooling system, would be cheaper, and will not consume energy. Instead of ground, garden pond bottom surface, can also be used to cool down the air.
Use coolers with thermal storage, such as ICE Energy's devices that make ice or chillers with a large cold water tank. These run at night (offpeak, when load and energy cost is lower and cooling efficiency is higher) to produce cooling during the day.
One should use passive cocepts for cooling, I have published a paper that gives diffeent techniques, it is available on mu publication list
One should use passive cocepts for cooling, I have published a paper that gives diffeent techniques, it is available on mu publication list it is attached
Thermal compression refrigeration systems, absorption cycles and energy storage would help alot in reducing energy consumption.
In underdevelopped countries with desert type climates a popular system is based on air cooling by humidification, by passing air through wet packs. A more refined system could be based on air drying by humidity absorption with zeolites, followed by dry air cooling by water spraying (and zeolite regeneration by hot flue gases). Almost no mechanical energy required, just for ventilation. Heat consumption for zeolite regeneration. Conceptually similar to absorption type refrigeration, but simpler
The complexity of the task, given by the bandwidth requirements (climatological, political, social, and economic objectives), and the cross-linking of disciplines impedes the development of integrated systems approaches. To integrate the building into the overall energy system has resulted in a reductionist approach and the splitting of manageable components that are natively designed and optimized independent of each other (e.g. maximizing building efficiency, integration of renewable energy resources, web development, etc.). Further, systemic interactions are seldom taken into account. This has resulted in a technological arms race in individual disciplines which is questionable ecologically, economically, and especially in terms of spatial planning. At the same time, optimizing the infrastructure of the energy supply is done completely separate from the planning and building design and does not take address local consideration (e.g. traditional structures , socio-spatial identities ) or user groups.
Therefore the building potential at the systemic level integrates efficient and highly-adaptive buildings, storage, and converters in power systems with distributed generation. The potential is derived through energy hubs and multi-energy grids. The organization of these two new elements in the future energy system ensures the efficacious development of an operational and decentralized energy supply.
e.g..: The energy system of a hotel will cover the energy demand by a solar based, tri-generation energy system. A diesel engine produces base load electricity and heat. The heat will be used for hot-water treatment, pool heating and cooling purpose. The peak load of cooling will be covered by conventional chillers. The required electricity demand of these chillers will be produced by the co-generator and photovoltaic system. The high correlation between the cooling peaks and the photovoltaic peaks will reduce the grid load and hence increase the gird stability. Additionally, a solar heat system will preheat hot water and support the absorption cooling system.
I lead a research project that looks specifically at demand scheduling and thermal storage in the fabric of buildings and hot water systems to minimize peak demand at times of low availability of embedded renewables. You may wish to look at our webpages at www.origin-concept.eu it can be scaled up to city or regional scale via informational systems rather than through direct actuation of loads.
Dear Salah,
Your question is so general and needs to discuss extensively.
There is a dozen way to reduce HVAC portion of electricity bill before and after construction:
- Using smart house method for HVAC system
- Using renewable energies
- Using high efficiency HAVC systems such as inverter air conditioners.
- Reduce solar gain heat: 1) with curtains and UPVC windows after construction 2) construct the building with low solar gain.
- .....
Please let me know if you want to discuss about details.
Thanks dear Maysam. Considering renewable energy, to what extent are they practically used in covering the load demand? Additionally, it is known that they are more economic generation, but is their usage has shown actual reduction in the electricity bill?
Dear Salah,
We did implement a central 30 KW solar power plant in Tax Organization in Ahvaz, Iran. Results showed that in 6 months of year, the building had not need to power grid.
Furthermore, in hot months (June and July) our solar power plant give electricity to power grid, interestingly.
Renewable energy could be economic if your design and implementation would be correct and suitable. For example, Iran has not good potential for use of wind turbine and is suitable for solar gains.
Feel free in contact
I will replace air conditioner with a dehumidifier. The AC cools the air that is high in humidity so it does not solve the problem, which is not the high temperature ( a bit uncomfortable) , but the high humidity (very uncomfortable).
The air conditioning business has a lot of explaining to do.
It is the freon leak of the old ACs that started the ozone problems in the atmosphere (today's skin cancer epidemic is the end result) ) and now it will be the mercury leak in the new ACs that will increase the mercury pollution that will affect the following generations.
We could also consider ACs based on absorption cycles. If cheap fuels are available locally, they avoid overloading the electrical grid.
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