1. In the heating system, air used in the combustion of fuel such as natural gas, propane or oil can be preheated by use of a heat exchanger and passing of flue gas through a heat exchanger to preheat the air. This method can also be used for dryers and ovens to reheat the air ...
aThe most important and cost effective element of an efficient heating, ventilating, and air conditioning (HVAC) system is a well insulated building. A more efficient building requires less heat generating or dissipating power, but may require more ventilation capacity to expel polluted indoor air. ...
127 The cost of round -trip air transportation is included ___the nine -day cruise package. A.by B.in C.at D.to 免费查看参考答案及解析 题目: 62 The apartments on the lower floors cost less because they are more exposed ___ dust and the noise of traffic. A.to B.without...
preliminary results from an analysis of the potential energy savings, and resultant air pollution reductions associated with the energy savings from the application of cost-effective energy efficiency and renewable energy (EE/RE) projects applied to new and existing Texas Independent School Districts (...
aIn both cases, the design parameters of the reforming temperature and air pre-heating may be specified according to the necessity for cost-effective plant operation, allocating the exergy costs of the individual units of the plant. 在两种情况下,改革的温度的设计参数和空气预先加热也许根据必要指定为...
Heating, ventilation and air conditioning will carries the major portion of the total money spent by any company on the energy. Even small adjustments to the HVAC systems will improve the building internal comfort condition and can result energy savings, hence we can save money. Improvement of th...
作者: Ahmad 摘要: No abstract available 关键词: Air conditioning & heating & ventilation Buildings Environmental engineering Heat engineering Refrigeration and refrigerating machinery Energy conservation Energy conservation Automatic control Control theory 学位级别: Ph.D. 被引量: 126 收藏...
The values of the initial input data for the proposed cogeneration system are listed in Table 4. It is assumed that the system operates 8000 h a year producing power and cooling [24]. Table 4. Input parameters for the proposed cogeneration cycle. 5. Performance Results By applying the equa...
air-cooling system by modifying the number of cooling fans and the inlet air temperature. A numerical model of 74 V and 2.31 kWh battery packing was simulated using the lattice Boltzmann method. The results showed that the temperature difference between the battery cells decreased with the ...
California has the lowest average cost of solar, while West Virginia and Alabama have some of the highest prices. Because you probably need a larger system in sweltering Arizona than cooler Maine and New Hampshire, you may end up paying a similar price overall. Average cost of solar by ...