tailieunhanh - ENERGY MANAGEMENT HANDBOOKS phần 9

vụ bê bối, giá năng lượng tăng cao, mất bảo vệ giá ở các bang enzim và bạn có thể thấy lý do tại sao tiện ích bãi bỏ quy định ngày càng nhiều vào tâm trí của khách hàng tiện ích trên toàn Hoa Hoa trong và ngoài nước. Với các hành động của nhà nước cá nhân về việc bãi bỏ khí tự nhiên trong | 730 Energy Management Handbook . The savings are determined by comparing the annual lighting energy use during the baseline period to the annual lighting energy use during the post-retrofit period. In Methods 5 and 6 the thermal energy effect can either be calculated using the component efficiency methods or it can be measured using whole-building before-after cooling and heating measurements. Electric demand savings can be calculated using Methods 5 and 6 using diversity factor profiles from the pre-retrofit period and continuous measurement in the post-retrofit period. Peak electric demand reductions attributable to reduced chiller loads can be calculated using the component efficiency tests for the chillers. Savings are then calculated by comparing the annual energy use of the baseline with the annual energy use of the post-retrofit period. F. HVAC Systems As mentioned previously during the 1950s and 1960s most engineering calculations were performed using slide rules engineering tables and desktop calculators that could only add subtract multiply and divide. In the 1960s efforts were initiated to formulate and codify equations that could predict dynamic heating and cooling loads including efforts to simulate HVAC systems. In 1965 ASHRAE recognized that there was a need to develop public-domain procedures for calculating the energy use of HVAC equipment and formed the Presidential Committee on Energy Consumption which became the Task Group on Energy Requirements TGER for Heating and Cooling in TGER commissioned two reports that detailed the public domain procedures for calculating the dynamic heat transfer through the building envelopes 126 and procedures for simulating the performance and energy use of HVAC These procedures became the basis for today s publicdomain building energy simulation programs such as BLAST DOE-2 and 129 In addition ASHRAE has produced several additional efforts to assist with the analysis of .