By Lal Jayamaha
Confirmed innovations and options for lowering power intake estate and facility managers can flip to Energy-Efficient development structures as a one-stop consultant to working and holding advertisement construction structures at height potency. Designed to aid lessen strength bills and meet environmental criteria, this cutting-edge productiveness instrument comprises absolutely illustrated, real-world examples of profitable eco-friendly construction initiatives that experience completed major, energy-saving effects. From power administration and auditing, HVAC platforms, cooling towers, and pumping systems…to lighting fixtures, electric platforms, automation, and development envelope, this specialist source takes readers step-by-step via systems for buying optimum functionality from each development approach. for every process, the ebook provides the newest equipment for bettering efficiency…identifying promising new solutions…evaluating their feasibility…and estimating real rate reductions. entire and authoritative, Energy-Efficient development structures permits construction pros to: Get an in-depth knowing of the rules of every construction process decide upon the best platforms for any nonresidential construction Maximize strength potency with functional recommendations and ideas make the most of hands-on equipment for comparing feasibility and estimating discount rates evaluate real-world examples of profitable eco-friendly construction tasks inside of This Cost-Saving power consultant • power administration and effort Auditing • Air-Conditioning and significant Chiller structures • Boilers and Heating structures • Pumping platforms • Cooling Towers • Air dealing with and Distribution platforms • lights structures • construction electric structures • development Automation platforms • construction Envelope
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Extra resources for Energy-Efficient Building Systems: Green Strategies for Operation and Maintenance
9 Typical centrifugal compressor. 517 The energy efficiency ratio (EER), which is the ratio of the cooling capacity (Btu/h) to the electric power input (W), is sometimes used to rate reciprocating and scroll compressors in air-cooled chillers and direct-expansion refrigeration units. ). This information, normally provided by chiller manufacturers, is useful in selecting chillers for different applications. 61 kW/RT at 70 percent load. If based on the expected load profile of the building, the chiller is going to operate only for a short period of time at 100 percent load and most of the time at 70 percent load, then chiller B would be a better option due to its superior performance at the operating point that will be most frequently encountered.
If these data are not available, a kWh consumption meter can be used to compute the electricity consumption of the chiller. Next, using manufacturers’ efficiency data, the kWh consumption for the proposed water-cooled chiller can be estimated. The difference between present (3915 kWh) and proposed (1803 kWh) total daily kWh consumption gives the daily savings (2112 kWh). Additional savings will also result from reduction in peak power demand if the peaks for power usage and cooling load coincide.
Commonly applied control strategy using cooling load and chilled water temperature (Fig. 20). In this system, the cooling load is calculated using the temperature difference for chilled water (T2 – T1) and the chilled water flow rate.