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District Energy for Partial Building Load

NC-v4 EAp2: Minimum Energy Performance
posted by Jess Scanlon on Jul 6, 2017, 2:07 pm

I am modeling a new building on a university campus following LEEDv4 Option 1, Whole Building Energy Simulation.
Heat Recovery Chillers are providing 44% of the cooling load of the building...

Last reply: Tyler Thumma, Apr 5, 2024, 11:43 am

Designing Baseline with Natural Ventilation using IDA-ICE

NC-v4 EAp2: Minimum Energy Performance
posted by Azra on Feb 7, 2024, 3:31 am

Hi,
Does someone know how are we to design baseline when we have natural ventilation?  According to ASHRAE 90.1 - 2010 Table G3.1.1A, we have to use System 7 as baseline HVAC System Type,...

Last reply: Tyler Thumma, Apr 5, 2024, 11:37 am

How to report High COP values for Chillers

NC-v4 EAp2: Minimum Energy Performance
posted by Rajat Wadhwa on Jan 25, 2024, 4:05 pm

Hi I am working on a Data Center in Chicago, and we have Chillers which have a high COP when the ambient temperature is low outside, so The energy modeling software that I am using can ony get as...

Last reply: Tyler Thumma, Apr 5, 2024, 10:59 am

Make Up Air Units Modeling Requirements (System or Process Load)- ASHRAE 90.1-2010

NC-v4 EAp2: Minimum Energy Performance
posted by Richard Tran on Dec 26, 2023, 9:05 pm

Hello,

I'm currently working on my first Energy Model for a dining hall/domitory on a college campus. Currently I'm having a dillema on if I need to model the Make Up Air Unit as a process...

Last reply: Tyler Thumma, Apr 5, 2024, 10:56 am

Water Heater Efficiency per Table 7.8 of ASHRAE 90.1-2010

NC-v4 EAp2: Minimum Energy Performance
posted by Richard Tran on Dec 26, 2023, 8:12 pm

Hello,

I'm currently working with two (600,000 Btuh, 130 Gallons, 97 EF) boilers for a dormitory building. From my interpretation of Table 7.8 the equation I'm suppose to use is 80%Et(Q/...

Last reply: Tyler Thumma, Apr 5, 2024, 10:49 am

Baseline system Exhaust Air Energy Recovery and Heating Supply air, Preheat coil

NC-v4 EAp2: Minimum Energy Performance
posted by J.W. Shin on Nov 22, 2023, 3:01 am

Dear Collegue,

I have some questions for Baseline model's System control

The project has the baseline system (System-7...

Last reply: Tyler Thumma, Apr 5, 2024, 9:54 am

Industrial or non-regular process load

NC-v4 EAp2: Minimum Energy Performance
posted by Charalampos Giannikopoulos on Nov 16, 2016, 8:52 am

For a facilities with increased process load (more than 60%), other than data centers, including but not limited to industrial facilities, is there a particular guidance in establishing a...

Last reply: Farooq Saeed, Mar 29, 2024, 1:40 am

Predictive Climate Data

NC-v4 EAp2: Minimum Energy Performance
posted by Dave Hubka on Feb 15, 2024, 8:17 am

Hello, 

Wondering if anyone is using predictive (i.e., Future) climate data rather than past climate data when performing energy models. 

Thanks!

Last reply: Farooq Saeed, Mar 27, 2024, 11:52 pm

Credit For Excess Chilled Water Rejected To Plant Site Chilled Water System

NC-v4 EAp2: Minimum Energy Performance
posted by Michael Hill on Feb 14, 2024, 4:53 pm

I am working on a project that is using heat pump chillers to generate hot and cold water for the building systems. When the building loads are cooling dominated, the excess heat is rejected to...

Last reply: Farooq Saeed, Mar 26, 2024, 4:29 am

Modeling only conditioned area

NC-v4 EAp2: Minimum Energy Performance
posted by Omar Elrawy on Dec 9, 2020, 10:05 pm

I'm certifying a huge factory with an attached office building. Is it possible to model only the office area?
The factory is high on process loads, which will make it impossible to achieve...

Last reply: Farooq Saeed, Mar 25, 2024, 1:38 am