V. Penjam, “Heat Pumps COP in the Estonian Context and Environmental Pollution Emissions Compare to Localized Heating System Commonly Used Fuels (Estonian),” Tallinn, 2005.

has been cited by the following article:

• TITLE: The Application of the Ground Source and Air-to-Water Heat Pumps in Cold Climate Areas

  AUTHORS: Kaspar Tennokese, Teet-Andrus Kõiv, Alo Mikola, Villu Vares

  KEYWORDS: Ground Source Heat Pump; Air-Water Heat Pump; Heat Requirement; COP

  JOURNAL NAME: Smart Grid and Renewable Energy, Vol.4 No.7, October 23, 2013

  ABSTRACT: This article gives an overview of using the ground source heat pump (GSHP) and air-to-water heat pump (A&WHP) in cold climate areas for heating and for domestic hot water production of buildings. Computer simulation and analysis were carried out for a typical detached house, with 200 m2 of living area, the heat demand of 9 kW and the average heat demand for DHW production of 1 kW. In heating period the average Coefficient of Performance (COP) of the A&WHP is considerably lower than COP of the GSHP.