From 7fad9e263569db7eaf392c56e47e01c552343342 Mon Sep 17 00:00:00 2001 From: Lissy Langer <54096244+lilanger@users.noreply.github.com> Date: Tue, 16 May 2023 14:57:45 +0200 Subject: [PATCH] Update supply_demand.rst Heat pump COP equations signs are wrong: https://pubs.rsc.org/en/content/articlelanding/2012/EE/c2ee22653g --- doc/supply_demand.rst | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/doc/supply_demand.rst b/doc/supply_demand.rst index 16242405..b043268b 100644 --- a/doc/supply_demand.rst +++ b/doc/supply_demand.rst @@ -133,12 +133,12 @@ The coefficient of performance (COP) of air- and ground-sourced heat pumps depen For the sink water temperature Tsink we assume 55 °C [`Config `_ file]. For the time- and location-dependent source temperatures Tsource, we rely on the `ERA5 `_ reanalysis weather data. The temperature differences are converted into COP time series using results from a regression analysis performed in the study by `Stafell et al. `_. For air-sourced heat pumps (ASHP), we use the function: .. math:: - COP (\Delta T) = 6.81 + 0.121\Delta T + 0.000630\Delta T^2 + COP (\Delta T) = 6.81 - 0.121\Delta T + 0.000630\Delta T^2 for ground-sourced heat pumps (GSHP), we use the function: .. math:: - COP(\Delta T) = 8.77 + 0.150\Delta T + 0.000734\Delta T^2 + COP(\Delta T) = 8.77 - 0.150\Delta T + 0.000734\Delta T^2 **Resistive heaters**