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How to maximise energy efficiency and cost effectiveness of different type heat pump projects: three case studies.

Number: pap. 8

Author(s) : KONCAR A.

Summary

This paper discusses applications of diverse range of heat pums for energy efficiency HVAC projects and associated opportunities and challenges. Three case studies are presented. First case study discusses use of efficient ground sourced heat pumps in a poorly designed and controlled HVAC System, and rectification measures. High energy efficiency features of HVAC Equipment were overshadowed by inadequate design and controls of the entire HVAC System, resulting in overall energy inefficient HVAC System, with high energy consumption and poor comfort conditions. Several design and control rectification measures have significantly improved energy efficiency and comfort conditions in the building,resulting in energy reduction of almost 50%, confirmed by utility electricity costs. Second case study discusses an integrated approach for design and implementation of a new HVAC System for a close control environment of an art gallery, located in one heritage building in a remote location. The main innovative design feature is modification of a standard design of air-to-air heat pumps, for close control environment applications (accurate control of space temperature and relative humidity), so that waste heat from condensers, when AC unit runs in dehumidification mode, can be used for reheating of dry and overcooled supply air. This is achieved by introduction of an additional condensing coil, downstream of the cooling/ dehumidification coil, controlled by comprehensive computerised HVAC Control system, BMS (Building Management System). Third case study, heating of seweage for a high-altitude sewerage treatment plant for a ski resort, discusses introduction of an off-peak water-to-water heat pump that recycles heat from an effluent pond, to reduce high cost of the existing heating (LPG that involves expensive over-snow transport). The project not only reduces cost of heating but also reduces thermal pollution of the nearby creek to which the ffuents are discharged after the treatments.

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  • Original title: How to maximise energy efficiency and cost effectiveness of different type heat pump projects: three case studies.
  • Record ID : 30023438
  • Languages: English
  • Source: 48th International HVAC&R Congress and Exhibition.
  • Publication date: 2017/12/06

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