Success Stories

Residential Building Thermal Cooling Load Assessment

An overview on an assessment done on a residential building based in Dubai Investment Park 1

Background Story

The Client owns a residential building located at Dubai Investment Park 1, Dubai which comprises of mixed studio and deluxe apartments. The building in question had a conditioned floor area of 12,858 m2, with a common area of 4,096 m2. To ensure that the building cooling requirements have been met, the Client was keen to assess the difference between the design and the actual cooling load present.

As a result, the Client engaged Ark Energy to develop and execute a program  and carry out a thorough, process-driven cooling load assessment in order to portray the difference between the intended design load and actual load required. Once this difference has bees assessed, the Client’s aim was to present the data to the local District Cooling Operator  to establish a rationale to revise the Declared Load.


During the life-cycle of this assessment, there has been ​very few issues with the handling of this project as this activity was focused on the assessment of the load through the use of the HAP simulation

Main Objective

The main goal of this activity was to determine the difference between the signed cooling load from the simulated cooling load assessed using the HAP Energy Model Software. This  analysis would be based on the collated data, site survey and reports provided by the Client to ensure accuracy of the outcome. This would give the Client the optimum thermal load estimates to which they can present to the District Cooling Provider


As shown in the following, a plan was drafted to ensure a proper cooling load assessment was conducted. During the analysis, the total cooling load is calculated based on Design conditions, and architectural drawings and the internal and external loads of the building are based on worst case scenario in terms of Ambient temperature, occupancy lighting, and appliances schedules

Table 01

Overall plan conducted for the Thermal Cooling Load Assessment for this building

From the analysis done using the software, the analysis revealed that the Client/Landlord’s load was 4% less than the signed load with the District Cooling Operator

Table 02

Deviations presented from the analysis emphasizing the difference between the actual and signed cooling loads

  • Some of the findings present from the analysis are as follows:
  • The common areas require 195.8 TR of cooling while the Signed Load is 170.1 TR
  • FAHU load is 99.1 TR, which is 27.4% lower than the Signed Load of 136.5 TR
  • The total cooling tonnage required by the client is 294.9 TR, 3.8% lower than the Signed Load with the District Cooling Operator

Table 03

Actual Declared Load distribution assessment reveals that the landlord’s consumption is lower than the simulated Peak and Calibrated design conditions

A reduction in Declared Load is warranted but must be coupled with Energy Efficiency (building retrofit), Low Delta-T rehabilitation, and energy management digitalization project


The results that were generated from the project include the following:

  • An assessment of the declared load was provided
  • Further insight on the further reduction

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