If you've got enough space on your roof after installing a solar pool heater, you might be able to offset this expense by adding solar panels to generate electricity -- but this, of course, only adds another substantial upfront cost to your pool heating project. Electric heat pumps ...
Gas furnaces generally heat homes more quickly than electric furnaces, despite lower efficiency. Higher efficiency can be gained in a gas furnace with an alternative to the traditional pilot light such as an intermittent, direct spark, or hot surface ignition. The higher cost of a more efficient...
Boosting 250 MSCF/day (7.1 kSCm/day) from 4 psig (27.6 kPag) to 10 psig (68.9 kPag) is a 10 hp (7.5 kW) job, so the ejector was 36% efficient while avoiding the cost of a downhole pump. In the first 4 years of this project, critical flow ejectors were installed on 32 CBM ...
The invention provides a low-cost oil-gas separator of a heat pump, and belongs to the field of oil development. The oil-gas separator comprises a shell, and the whole side face of the shell is defined by a first side face, a second side face, a third side face and a shell front ...
By convention, Bu>0 (Bu<0) if u∈Vs (u∈Vd), and Bu=0 otherwise. The basic mathematical model of the minimum fuel cost problem (MFCP) is given by: (4)ming(x,p)=∑(u,v)∈Acguv(xuv,pu,pv) (5)subjectto∑v:(u,v)∈Axuv-∑v:(v,u)∈Axvu=Buu∈V (6)(xuv,pu,pv)∈...
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For this purpose, it has been suggested to increase the amount of surfactants, but it should be noted that with the increase the concentration of surfactants, the injection process may not be cost-effective. In addition, it should be noted that many surfactants lose their properties when ...
The economic viability of this process may rely on the low cost of ethane near Saudi oil fields, and it may not be competitive with methanol carbonylation elsewhere in the world. Ethane can be used as a refrigerant in cryogenic refrigeration systems. On a much smaller scal...
The economic viability of this process may rely on the low cost of ethane near Saudi oil fields, and it may not be competitive with methanol carbonylation elsewhere in the world. Ethane can be used as a refrigerant in cryogenic refrigeration systems. On a much...
Climate change could significantly affect consumer demand for energy in buildings, as changing temperatures may alter heating and cooling loads. Warming climates could also lead to the increased adoption and use of cooling technologies in buildings. We a