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[General] AEE CEM考題資訊是行業領先材料＆CEM考試證照綜述

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【General】 AEE CEM考題資訊是行業領先材料＆CEM考試證照綜述

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P.S. Testpdf在Google Drive上分享了免費的2026 AEE CEM考試題庫：https://drive.google.com/open?id=1TdYDVfSVeEXFaiFQQT65Xrf2hHVzkAga
彰顯一個人在某一領域是否成功往往體現在他所獲得的資格證書上，在IT行業也不外如是。所以現在很多人都選擇參加CEM資格認證考試來證明自己的實力。但是要想通過CEM資格認證卻不是一件簡單的事。不過只要你找對了捷徑，通過考試也就變得容易許多了。這就不得不推薦Testpdf的考試考古題了，它可以讓你少走許多彎路，節省時間幫助你考試合格。
IT行業中很多雄心勃勃的專業人士為了在IT行業中能更上一層樓，離IT頂峰更近一步，都會選擇AEE CEM這個難度較高的認證考試來獲取通認證證書從而獲得行業認可。AEE CEM 的難度比較高所以通過率也比較低。但是報名參加AEE CEM 認證考試是個明智的選擇，因為在如今競爭激烈的IT行業應該要不斷的提升自己。但是您可以選擇很多方式幫你通過考試。
CEM考試證照綜述，CEM題庫資訊你用過Testpdf的CEM考古題嗎？這個考古題是最近剛更新的資料，包括了真實考試中可能出現的所有問題，保證你一次就可以通過考試。這個考古題可以讓你看到你意想不到的成果。如果你考試失敗Testpdf將會全額退款，所以請放心使用。利用Testpdf的考試資料，你肯定可以得到你想要的成功。
最新的 Energy Management CEM 免費考試真題 (Q136-Q141):問題 #136
In an ammonia-water absorption chiller, what material is the refrigerant?
  • A. Some form of fluorocarbon
  • B. Water
  • C. Lithium bromide
  • D. Ammonia
答案：D

問題 #137
Which of the advantages listed below, makes an ice TES system more preferred over a water TES system, when a load shifting strategy is considered?
  • A. Ice-storage systems require lower maintenance due to lower pumping volume
  • B. Ice-storage systems require smaller storage tanks since ice has a higher energy storage density
  • C. Water-storage systems require smaller storage tanks since water has a higher density than ice
  • D. Ice-storage systems operate with a higher coefficient of performance (COP)
答案：B
解題說明：
To determine which advantage makes an ice Thermal Energy Storage (TES) system more preferred over a water TES system for a load shifting strategy, we need to evaluate each option based on the principles of thermal energy storage as outlined in the Association of Energy Engineers (AEE) Certified EnergyManager (CEM) training materials. Load shifting involves storing energy (cooling capacity) during off-peak periods and releasing it during peak demand, making storage efficiency and capacity critical. Let's analyze each option step-by-step.
Step 1: Understand Ice TES vs. Water TES in Load Shifting
* Ice TES: Uses the latent heat of fusion of water (ice melting) to store cooling energy. Ice is formed during off-peak hours (e.g., overnight) and melted during peak hours to provide cooling.
* Water TES: Uses the sensible heat capacity of water, storing chilled water (typically 4-6°C) to provide cooling.
* Load Shifting Goal: Maximize cooling storage in minimal space and cost, shifting electrical demand from peak to off-peak periods.
* CEM Reference: CEM materials in the "Thermal Energy Storage" section highlight ice TES for its high energy density and compact storage, contrasted with water TES for simpler operation but larger volume requirements.
Step 2: Evaluate Each Option
Option A: Ice-storage systems operate with a higher coefficient of performance (COP)
* Analysis:
* COP Definition: COP = (Cooling Output) / (Energy Input). For TES, this relates to the chiller's efficiency.
* Ice TES: Requires chillers to operate at lower temperatures (e.g., -5°C to 0°C) to freeze water, which typically reduces chiller COP (e.g., 3-4) compared to water TES chillers operating at 4-6° C (COP ~5-6).
* Reality: Ice TES systems often have a lower COP due to the additional energy needed for phase change, though total system efficiency may improve with load shifting benefits.
* CEM Reference: CEM notes that ice TES energy input is higher per unit of cooling due to lower evaporating temperatures, contradicting a "higher COP" claim.
* Conclusion: This statement is incorrect and not an advantage for ice TES in load shifting.
Option B: Ice-storage systems require smaller storage tanks since ice has a higher energy storage density
* Analysis:
* Energy Storage Density:
* Ice TES: Relies on latent heat of fusion = 334 kJ/kg (80 kcal/kg or ~144 Btu/lb). This is the energy absorbed/released when water freezes/melts, far exceeding sensible heat.
* Water TES: Relies on sensible heat = cp##T c_p cdot Delta T cp##T, where cp=4.18 kJ
/kgcdotp°C c_p = 4.18 ,         ext{kJ/kg °C} cp=4.18kJ/kgcdotp°C (1 Btu/lb °F). For a typical #T=10°CDelta T = 10°C#T=10°C (e.g., 4°C to 14°C), energy stored = 4.18×10=41.
8 kJ/kg 4.18         imes 10 = 41.8 ,         ext{kJ/kg} 4.18×10=41.8kJ/kg (~20 Btu/lb).
* Comparison: Ice stores ~8 times more energy per kg than water for a 10°C range (334 vs.
41.8 kJ/kg).
* Volume Impact: Ice's density (~917 kg/m³) is slightly less than water (~1000 kg/m³), but the latent heat advantage dominates, reducing required tank volume significantly.
* Load Shifting: Smaller tanks mean less space and potentially lower capital costs, a key advantage for peak load management.
* CEM Reference: CEM training emphasizes ice TES's high energy density as a primary reason for its preference in space-constrained load shifting applications.
* Conclusion: This statement is correct and a clear advantage for ice TES.
Option C: Water-storage systems require smaller storage tanks since water has a higher density than ice
* Analysis:
* Density: Water = 1000 kg/m³; Ice = 917 kg/m³. Water is denser, but density alone doesn't determine storage size in TES.
* Energy Storage: As calculated, water's sensible heat capacity (e.g., 41.8 kJ/kg for 10°C) is much lower than ice's latent heat (334 kJ/kg). To store the same cooling capacity, water TES requires
~8 times more mass and thus larger tanks (even accounting for density differences).
* Implication: Water TES tanks are larger, not smaller, contradicting the statement.
* CEM Reference: CEM materials note water TES's larger volume requirements as a disadvantage compared to ice TES.
* Conclusion: This statement is incorrect and not an advantage for ice TES (it favors water TES incorrectly).
Option D: Ice-storage systems require lower maintenance due to lower pumping volume
* Analysis:
* Pumping Volume: Ice TES often uses glycol or brine solutions to transfer heat at lower temperatures, requiring pumps sized for smaller volumes due to concentrated coolingcapacity.
Water TES circulates larger volumes of chilled water. However, "lower pumping volume" doesn' t directly translate to "lower maintenance."
* Maintenance: Ice TES systems are more complex (ice-making equipment, heat exchangers), potentially increasing maintenance (e.g., defrost cycles, corrosion from brine). Water TES is simpler, often with lower maintenance needs.
* CEM Reference: CEM discusses ice TES complexity as a trade-off for its density advantage, not a maintenance benefit.
* Conclusion: This statement is questionable and not a primary advantage for load shifting.
Step 3: Identify the Key Advantage for Load Shifting
* Load Shifting Context: The goal is to store maximum cooling capacity efficiently during off-peak hours. Option B (smaller tanks due to higher energy storage density) directly supports this by reducing space and installation costs, a critical factor in TES design per CEM guidelines.
* Elimination:
* A: Incorrect (lower COP, not higher).
* C: Incorrect (water TES tanks are larger).
* D: Weak (maintenance isn't clearly lower; not the primary driver).
* B: Correct and relevant.

問題 #138
Using a degree-day base of 18°C, calculate the number of cooling degree days (CDD) if the outside temperature is a uniform 25°C throughout the year (365 days/year).
  • A. 1,955 CDD/yr
  • B. 2,975 CDD/yr
  • C. 2,250 CDD/yr
  • D. 2,555 CDD/yr
  • E. 1,845 CDD/yr
答案：D

問題 #139
For general indoor residential lighting applications, which lamp would you recommend to replace an 11 watt CFL with in order to provide the most appropriate illumination with the highest efficacy?
SELECT THE CORRECT ANSWER
  • A. 4 watt incandescent
  • B. 10 watt light-emitting diode
  • C. 5 watt low-pressure sodium
  • D. 36 watt fluorescent tube with electronic ballast
  • E. 7 watt light-emitting diode
答案：E

問題 #140
A facility uses 250,000 kWh in a 31-day billing period. The peak demand in the billing period is 1,200 kW.
What is the facility partial load factor?
  • A. 45%
  • B. 66%
  • C. 77%
  • D. 28%
  • E. 33%
答案：E
解題說明：


問題 #141
......
在現在這個人才濟濟的社會裏，還是有很多行業是缺乏人才的，比如IT行業就相當缺乏技術性的人才。而AEE CEM 認證考試就是個檢驗IT技術的認證考試之一。Testpdf是一個給你培訓AEE CEM 認證考試相關技術知識的網站。
CEM考試證照綜述: https://www.testpdf.net/CEM.html
在互聯網上，你可以找到各種培訓工具，準備自己的最新 AEE Certified Energy Manager (CEM) - CEM 考試，但是你會發現 AEE Certified Energy Manager (CEM) - CEM 考古題試題及答案是最好的培訓資料，我們提供了最全面的驗證問題及答案，想要通過AEE的CEM考試並取得CEM的認證資格嗎，更新最快、最全的 CEM 考古題，Testpdf CEM考試證照綜述對自己的資料有足夠的信心，你也要對Testpdf CEM考試證照綜述有足夠的信心，本站提供的認證具有一種震撼力，業界人士都知道，擁有AEE CEM認證指南，將意味著在全球範圍內可獲得一個令人羨慕的工作和豐厚的優惠待遇，提供免費下載試用CEM-Certified Energy Manager (CEM)題庫和一年的免費更新服務。
妳說妳會木匠活”桑梔問道，餐館集群在吸引新餐館，吸引社區外的食CEM客以及增加當地稅收方面非常成功，在互聯網上，你可以找到各種培訓工具，準備自己的最新 AEE Certified Energy Manager (CEM) - CEM 考試，但是你會發現 AEE Certified Energy Manager (CEM) - CEM 考古題試題及答案是最好的培訓資料，我們提供了最全面的驗證問題及答案。
CEM考題資訊＆認證成功保證，簡單的培訓方式和CEM考試證照綜述想要通過AEE的CEM考試並取得CEM的認證資格嗎，更新最快、最全的 CEM 考古題，Testpdf對自己的資料有足夠的信心，你也要對Testpdf有足夠的信心，本站提供的認證具有一種震撼力，業界人士都知道，擁有AEE CEM認證指南，將意味著在全球範圍內可獲得一個令人羨慕的工作和豐厚的優惠待遇。
從Google Drive中免費下載最新的Testpdf CEM PDF版考試題庫：https://drive.google.com/open?id=1TdYDVfSVeEXFaiFQQT65Xrf2hHVzkAga
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