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Richard J. Peppin

Bio: Richard J. Peppin is an academic researcher from Silver Spring Networks. The author has contributed to research in topics: ASHRAE 90.1 & Noise control. The author has an hindex of 2, co-authored 8 publications receiving 53 citations.

Papers
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Journal ArticleDOI
TL;DR: In this article, the authors present the extent of ASHRAE's involvement in sound and noise standards, and discuss the limitations and current controversial topics, summarizing the topics in the publications.
Abstract: This paper presents the extent of ASHRAE’s involvement in sound and noise standards. ASHRAE has only a limited number of formal standards in acoustics but its two volumes of the four‐volume set of handbooks contain many items that have become de facto standards. The ‘‘Fundamentals Handbook’’ and the ‘‘Applications Handbook’’ provide tables that show the power loss due to end reflection, attenuation of lined ducts, room criteria approaches and metrics, and other material properties that are used even though, and in spite of the fact that, they never were evaluated as a standard by Canvass or other means. I will summarize the topics in the ASHRAE publications and discuss the limitations and current controversial topics.

47 citations

Journal Article
TL;DR: The Simulation and prediction of outdoor sound propagation using advanced calculation methods are based on principles of physics with an effort to try to avoid empirical or approximate methods, often found in published outdoor propagation standards.
Abstract: Standardization provides methodologies by which independent investigations of the same situation are able to derive the same conclusions. However, standardization is sometimes also perceived as absolute and accurate, beyond which one should not investigate matters deeper. The responsibility of the accuracy of these methods does not lie with the developers but with the standards organizations. This is not the case with algorithms based on pure scientific research where the full responsibility lies with those who turn it into software applications. The Simulation and prediction of outdoor sound propagation using advanced calculation methods are based on principles of physics with an effort to try to avoid empirical or approximate methods, often found in published outdoor propagation standards.

2 citations

Journal ArticleDOI
TL;DR: In this article, the authors reviewed a standby in HVAC acoustics, the 1995 ASHRAE Handbook, and found that the Noise and Vibration chapter is far from perfect.
Abstract: Noise of heating, ventilating, and air conditioning (HVAC) systems could have been one of the most common single sources of noise in the developed countries, but it is not, partially because of well‐known methods of HVAC noise control promulgated by professional organizations such as ASHRAE, and trade associations such as the Air Conditioning and Refrigeration Institute (ARI) and the Air Movement and Control Association (AMCA). Most people who live in air conditioned spaces are unaware of the work that went into making their environment quiet by many private consultants and by many corporate engineers and acousticians working for the major HVAC companies. It is true there are problem jobs, usually low‐noise environments that do not meet expectations, but these jobs are constantly being worked on and the numbers are being reduced by people using the ASHRAE Handbook. But, unfortunately, the Noise and Vibration chapter is far from perfect. This paper reviews a standby in HVAC acoustics, the 1995 ASHRAE Handb...

2 citations

Journal ArticleDOI
TL;DR: In this paper, the authors present the results of a forensic investigation of a very brutal murder based on acoustics of the victims' screams, the structure housing the murder, and the witness.
Abstract: Often engineers and lawyers cannot communicate, in spite of repeated attempts. The lawyer has an idea and wants the engineer to prove it in front of a jury. As examples: a quiet, or briefly loud source must be shown to cause hearing damage, or a construction project in a backyard must be shown to be nonannoying. Often it is a no brainer, either way. But the testimony must be given! In this paper, I discuss a sad case. A young woman and her baby daughter were murdered. A witness claimed she heard something in the dead of night. If so, it was further evidence of guilt of the accused. If not, it was evidence of the lack of credibility of the witness and helped show innocence. I present the results of a forensic investigation of a very brutal murder based on acoustics of the victims’ screams, the structure housing the murder, and the witness. The results of the investigation attempted to help the case.

1 citations

Journal ArticleDOI
TL;DR: In this paper, the authors discuss the equipment needed, the test method, and the uncertainty of the measurement of sound generated by rainfall on building elements and discuss the evaluation of sound insulation in buildings and of building elements.
Abstract: About 10 years ago at an ISO TC 29 meeting, the concept of the measurement of rainfall noise was suggested. At the time it made no sense to me. Who cares about this? Not me, since I liked the sound of rain on my roof, and the louder the better. The concept was to evaluate roofs to assess the insulation capabilities from sound (vibration?) produced by rainfall. But in spite of my skepticism, wiser heads prevailed, and in the end, the approach was drafted into a work item, a draft, and a final draft standard. This paper is a summary of ISO FDIS 140‐18, ‘‘Acoustics—Measurement of sound insulation in buildings and of building elements—part 18: Laboratory measurement of sound generated by rainfall on building elements.’’ I discuss the equipment needed, the test method, and the uncertainty.

1 citations


Cited by
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Journal ArticleDOI
10 Jan 2014-BMJ
TL;DR: Unless specific remediation is used, reducing the ventilation of dwellings will improve energy efficiency only at the expense of population wide adverse impact on indoor exposure to radon and risk of lung cancer.
Abstract: Objective To investigate the effect of reducing home ventilation as part of household energy efficiency measures on deaths from radon related lung cancer.

131 citations

Journal ArticleDOI
Ala Hasan1
TL;DR: In this article, a method is presented to produce air at a sub-wet bulb temperature by indirect evaporative cooling, without using a vapour compression machine, by branching the working air from the product air, which is indirectly pre-cooled before it is finally cooled and delivered.

121 citations

Journal ArticleDOI
TL;DR: In this paper, a genetic algorithm (GA) was used to solve the optimal chiller loading (OCL) problem, which overcomes the flaw that Lagrangian method is not suitable as there is non-convex kW-PLR function in a system.

74 citations

Journal ArticleDOI
TL;DR: Theoretical analysis and computational modelling of closed wet cooling towers (CWCTs) are presented in this paper. But the authors focus on the performance of a cooling system used to cool office buildings and use the transient system (TRNSYS) simulation environment.

69 citations

Journal ArticleDOI
TL;DR: In this paper, the performance of two evaporatively cooled heat exchangers is analyzed, one has plain circular tubes while the other has plain oval tubes, and both are investigated under similar operating conditions in relation to airflow rates and inlet hot water temperatures.

67 citations