Monday, January 30, 2017: 8:00 AM-9:30 AM
Fundamentals and Applications
Chair:
Glenn Friedman, P.E., Taylor Engineering
Technical Committee: 4.1 Load Calculation Data and Procedures
The components of lighting heat gains are a significant contributor to space cooling load in buildings. These components include the fraction of convective and radiative heat gains, as well as the fraction of conditioned space and plenum space heat gains. Relevant data for the LED lighting heat gain is sparse. As the LED technology and application are rapidly growing, the need to identify LED lighting heat gain becomes highly demanded. This seminar summarizes the findings of ASHRAE RP-1681, in which 14 commercially available LED lighting luminaries’ heat gain distributions were determined through systematically designed experiments.
1 Approach, Test Setup and LED Luminaire Selection for Testing LED Lighting Heat Gain Distribution
This session introduces the technical approach to determine the conditioned space heat fraction and the radiative heat fraction of the LED lighting fixtures under test. The session describes the configuration of the test chamber, net radiometer, and instrumentation. The criteria of selecting representative LED luminaires for testing are also discussed.
2 Test Results of LED Lighting Heat Gain Distribution and Comparison to Conventional Lighting
The test results of fourteen LED lighting luminaires are analyzed in this session, including the heat gain fractions obtained from base case and the impact of different test conditions. The session also compares the heat gain distribution between LED lighting fixtures and conventional lighting fixtures.
3 Field Application of LED Lighting Heat Gain Distribution Data
Field application of LED lighting heat gain distribution data. Widespread application of LED lighting is having a significant impact on HVAC systems design. This presentation compares LED lighting load densities for typical office spaces with vs more traditional lighting designs. Data gathered as part of recent research will be used to calculate comparative impact on cooling loads and resulting air handler and chiller loads.