{"id":10618,"date":"2022-08-04T13:53:38","date_gmt":"2022-08-04T20:53:38","guid":{"rendered":"https:\/\/essential.construction\/news\/?p=10618"},"modified":"2022-08-04T13:53:38","modified_gmt":"2022-08-04T20:53:38","slug":"building-managers-can-cut-costs-by-following-six-measures","status":"publish","type":"post","link":"https:\/\/essential.construction\/news\/building-managers-can-cut-costs-by-following-six-measures\/","title":{"rendered":"Building Managers Can Cut Costs By Following Six Measures"},"content":{"rendered":"
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World Construction Today \u2013 There are certain actions owners and operators of large commercial buildings may take to enhance impact on the environment, decrease carbon emissions, and save money on energy as Australia advances promises to net zero emissions. Building optimization and efficiency is a critical technique to minimise operational expenditure while improving the sustainability goals of constructed assets in light of inflation\u2019s effects on many businesses\u2019 costs and its spillover effects on consumers.<\/p>\n

The two possible methods for increasing a building\u2019s energy efficiency are capital spending and operational improvement, according to CIM founder and CEO David Walsh.<\/p>\n

While both have merit, one\u00a0should always prefer capital expenditures on new equipment to the more intelligent use of current equipment. The energy one\u00a0doesn\u2019t\u00a0utilise is always the least expensive. He claims that enhancing the efficiency of equipment through control systems might result in immediate power usage reductions and thus lower energy expenditures.<\/p>\n

The ROI can frequently be calculated in weeks or months rather than years. The majority of modifications that have an effect on operational efficiency are related to HVAC systems, which use the majority of the energy in a building. HVAC system optimization alone might result in an efficiency gain of 10% to 15%.<\/p>\n

The six actions that Australian building owners and operators can take right away to have a significant immediate effect are listed below.<\/p>\n

1. Implement a BMS control plan<\/strong><\/h3>\n

Run a control plan for a building management system (BMS) to assess, pinpoint, and address shortcomings. When backed by solid building analytics data, these optimization projects are likely to produce noticeable efficiency gains.<\/p>\n

Lockouts for outside air temperature
\nRegulation of cooling tower temperature
\nCalls for the cooling and heating of chillers
\nSetpoints for zone temperatures
\nCleanup operation at night
\nCHW setpoint for temperature<\/p>\n

2. Lockouts related to outside air temperature<\/strong><\/h3>\n

By removing heat from the condenser of the chillers, cooling towers lower the temperature of the water that the chillers use. There are more effective methods that take into consideration the quantity of moisture that is present in the air, or wet-bulb temperature, whereas chiller manufacturers define the highest water temperature the coolers can function at to meet the cooling loads. All cooling towers should ideally track the temperature of the outside air wet bulb and adjust their controls to it with an offset somewhere between 4 and 5 C.<\/p>\n

A tip for improvement:<\/em><\/strong><\/h4>\n

With a minimum temperature of 20 \u00b0C (adjustable) and a maximum temperature of 29.5 \u00b0C, the condenser temperature of the water should be adjusted based on the building\u2019s exterior air temperature, wet-bulb + 5 \u00b0C (adjustable).<\/p>\n

3. Boiler heating and chiller cooling<\/strong><\/h3>\n

To meet the building\u2019s cooling needs using central cooling systems, one must make sure the chillers turn on at the appropriate moment. Early chiller activation raises the possibility of excessive energy use and may shorten the lifespan of the equipment with time.<\/p>\n

Similar to this, boilers should only be turned on when necessary. Boilers should not be operated earlier than necessary as this increases consumption without attaining the desired results and raises the risk of equipment failure due to short rotation (continuously\u00a0turning on and off). For both the chilled and hot water valves, it is essential to establish the proper setpoint and time period.<\/p>\n

A tip for improvement:<\/em><\/strong><\/h4>\n
Chiller<\/strong><\/h5>\n

The cooling call must be made if the optimum chilled water valve setting is 90% for 10 minutes.
\nThe cooling call must be turned off if the maximum chilled water valve level falls below 20%\u00a0for 10 minutes.<\/p>\n

Boiler<\/strong><\/h5>\n

The heating call should be made if the maximum hot water valve position is 90% for 10 minutes.
\nThe heating call must be turned off if the maximum hot water valve level falls below 20%\u00a0for 10 minutes.<\/p>\n

4. Setpoints for zone temperatures<\/strong><\/h3>\n

Facilities managers and contractors frequently change zone temperature setpoints to resolve tenant concerns. However, it\u2019s crucial to keep the big picture in mind and align all setpoints to prevent neighbouring systems from colliding.<\/p>\n

A tip for improvement:<\/em><\/strong><\/h4>\n

Install more energy-efficient lighting; cold light is preferable to minimise the possibility of illumination warming the thermostat settings and causing temperature fluctuations.
\nClean the ducts, vents, and filters, which can collect dirt, dust, and other debris.
\nUpdate any outdated HVAC components or systems.
\nModify ductwork: New office and cubicle layouts can necessitate ductwork relocation.
\nInstalling new window coverings that are energy-efficient will help you save money on electricity and make your home more comfortable.
\nIncrease thermal properties by adding window film, which reduces hot spots and offers UV protection and sun control.<\/p>\n

5. Purge operations at night<\/strong><\/h3>\n

Buildings in warmer areas need more cooling at night because the surrounding light and temperature factors are more favourable. Commercial buildings operate as thermal storage, and temperatures may rise while vacant during the weekend. This significantly increases the air conditioning strain on buildings. A night purge is advised to exhaust the building during the dawn hours and eliminate the surplus cooling load in order to reduce this burden.<\/p>\n

A tip for improvement:<\/em><\/strong><\/h4>\n

When ambient conditions are at their worst, usually between 2 and 4 in the morning, a night purge typically functions. Its role is to vent the heated air that has accumulated inside the structure when the interior temperature is high (more than 25 \u00b0C). When the HVAC system is turned off for an extended period of time, this typically happens in warmer climes and is noticeable in office buildings (i.e., over the weekend).
\nTo bring cooler air into the building while venting warm air without using the central chilled water system, experts advise running the supply blower with the economy dampers fully open. It\u2019s crucial that the fans don\u2019t run on high for longer than an hour. An analysis of the thermal benefit vs energy consumption must be done if the device is operated for longer than an hour.<\/p>\n

6. Setpoint for chilled water temperature<\/strong><\/h3>\n

Based on the demands of the building, the building management system can modify the chilled water temperature setpoint of the chiller. In order to preserve internal thermal comfort conditions throughout the warmer months, buildings are often built with the chilled water set to 6 C. It is important to know when to increase the chiller\u2019s setpoint temperature since rebooting up too quickly could affect occupants\u2019 thermal comfort while resetting down too soon could affect the chillers\u2019 energy use and operation.<\/p>\n

A tip for improvement:<\/em><\/strong><\/h4>\n

If the average chilled water valve level is less than 60%, the chilled water temperature threshold must be increased.
\nIf the average chilled water valve level is more than 70%, the chilled water temperature threshold must be dropped.
\nEvery five minutes, the chilled water temperature threshold will be reset by 0.5\u00b0C.
\nThe setpoint for the minimal chilled water temperature is 6 C.
\nThe setpoint for the optimum chilled water temperature is 9 \u00b0C.
\n\u00a0<\/p>\n

This item was originally posted here: Read More<\/a>\u00a0<\/p>","protected":false},"excerpt":{"rendered":"

World Construction Today \u2013 There are certain actions owners and operators of large commercial buildings may take to enhance impact … Read more<\/a><\/p>\n","protected":false},"author":0,"featured_media":7303,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1066,461],"tags":[],"class_list":["post-10618","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-all-posts","category-world-construction-today","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-33"],"_links":{"self":[{"href":"https:\/\/essential.construction\/news\/wp-json\/wp\/v2\/posts\/10618","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/essential.construction\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/essential.construction\/news\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/essential.construction\/news\/wp-json\/wp\/v2\/comments?post=10618"}],"version-history":[{"count":0,"href":"https:\/\/essential.construction\/news\/wp-json\/wp\/v2\/posts\/10618\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/essential.construction\/news\/wp-json\/wp\/v2\/media\/7303"}],"wp:attachment":[{"href":"https:\/\/essential.construction\/news\/wp-json\/wp\/v2\/media?parent=10618"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/essential.construction\/news\/wp-json\/wp\/v2\/categories?post=10618"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/essential.construction\/news\/wp-json\/wp\/v2\/tags?post=10618"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}